手把手教你开发属于自己的代码生成器

哈哈，猿设计终于讲完了，接下来的一段时间，工厂君打算和大家一起来实现我们之间的设计——构建一个自己的电商系统来玩耍。嗯，这个可是一个大工程，代码量很大，业务也比较复杂，要搞就好好搞，代码方面还是需要一些规范的。

在这个背景下，工厂君为了解决代码的编写速度，也差点被逼上梁山——一个人的力量实在太有限了。工厂君灵机一动，决定搞一个适合项目开发的利器出来——pz-cg。在它的帮帮助下，工厂君节约了开发时间，大大地提高了工作效率。

其实对于新手而言，过度的依赖这类工具，深受其害的事情是大概率事件，如果你是一个新手，希望你在以后的学习中，尽量的去手写代码。虽然会吃力一些，遇到各种稀奇古怪的问题，但这是你的猿人生涯中，必须去面对和解决的事情。言尽于此，不再絮叨。

其实代码生成器有很多，网络上也有各种各样的版本，自然是各有各的好处，也各有各的弊端，今天工厂君会带着大家去造轮子——造一个符合大多数公司编码规范，也能够支持你快速修改的代码生成轮子。造轮子其实也是快速提升你技术实力的一种方式，你经常吐槽CRUD没技术含量，那么你就写个制造CRUD的代码机器出来如何？这个过程也是能提高你的技术实力的，准备好你的收藏，今天的东西，以后你大概率用得上，能够帮你解决实际问题。

既然要搞一个轮子，我们还是希望这个轮子相对通用，不但可以支持springMVC、Spring、Mybatis，在SpringBoot,SpringCloud的框架下依然可用才是硬道理^_^

既然是代码生成器，那么我们不妨来想一想，我们要生成什么样的代码？什么样的代码是需要我们去生成的？我们要搞的代码生成的本质是什么？关于这个答案，我们需要从一些需要去完成的功能中，管中窥豹一番。就以我们后续会讲到的品牌管理为例吧。

上图的功能就是一个较为典型的管理功能，像这一类功能，都有一些共同的特点——新增、修改、删除、列表查询（包括分页功能）。这些功能是相对固定的，代码的编写方式也相对有一定的痕迹可以寻觅。我们先一起来看一看后端的代码。

一般来说，在使用SpringMVC、Spring、Mybatis框架，进行开发的方式，像上述这样一个比较基本的页面，对应的后端代码，会分为Controller、service、dao三个层面。Controller层负责页面数据的封装、service层负责组织业务逻辑，dao层负责持久化数据。当然，如果你要分得细一点，会加入一个manager层面，用于组织数据持久层的代码，将业务逻辑交由service进行管控也是常见的做法。考虑到这个功能比较简单，我们并没有使用manager层，稍微简单一些，我们先看代码。


/*** Copyright(c) 2004-2020 pangzi*com.pz.basic.mall.controller.sys.MallBrandController.java*/
package com.pz.basic.mall.controller.sys;import com.pz.basic.mall.domain.base.Result;
import com.pz.basic.mall.dmain.base.enums.DataActiveStatusEnum;
import com.pz.basic.mall.domain.base.enums.DataStatusEnum;
import com.pz.basic.mall.domain.sys.MallBrand;
import com.pz.basic.mall.domain.sys.query.QueryMallBrand;
import com.pz.basic.mall.service.sys.MallBrandService;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;import java.util.List;/**** @author pangzi* @date 2020-06-22 20:47:27***/
@RestController
@RequestMapping("/brandManage")
public class MallBrandController {private MallBrandService mallBrandService;public void setMallBrandService(MallBrandService mallBrandService) {this.mallBrandService =mallBrandService;}/*** 新增品牌* @param mallBrand* @return*/@RequestMapping("/addMallBrand")public Result<MallBrand>  addMallBrand(@RequestBody MallBrandmallBrand){try{return   mallBrandService.addMallBrand(mallBrand);}catch(Exception e){e.printStackTrace();return new Result(false);}}/*** 修改品牌* @param mallBrand* @return*/@RequestMapping("/updateMallBrand")public Result updateMallBrand(@RequestBodyMallBrand mallBrand){try{return mallBrandService.updateMallBrandById(mallBrand);}catch(Exception e){e.printStackTrace();return new Result(false);}}/*** 删除品牌* @param mallBrand* @return*/@RequestMapping("/deleteMallBrand")public Result deleteMallBrand(@RequestBodyMallBrand mallBrand){try{return mallBrandService.deleteMallBrandById(mallBrand);}catch(Exception e){e.printStackTrace();return new Result(false);}}/*** 分页返回品牌列表* @param queryMallBrand* @return*/@RequestMapping("/findByPage")public Result<List<MallBrand>> findByPage(@RequestBody  QueryMallBrand queryMallBrand){returnmallBrandService.getMallBrandsByPage(queryMallBrand);}}


/*** Copyright(c) 2004-2020 pangzi*com.pz.basic.mall.service.sys.MallBrandService.java*/
package com.pz.basic.mall.service.sys;
import java.util.List;import com.pz.basic.mall.domain.base.Result;
import com.pz.basic.mall.domain.sys.query.QueryMallBrand;import com.pz.basic.mall.domain.sys.MallBrand;
import java.util.Map;
import java.io.Serializable;/*** service层，组装外部接口 和 本地业务，为本业务 或者其他业务提供服务，统一返回Result* 通过Result.isSuccess判断调用是否成功* 此类中新增业务接口设计（接口命令，入参数据，返回值）要 能尽量完整的表达业务 含义* @author pangzi* @date 2020-06-26 11:20:40*/
public interface MallBrandService {/*** 新增 mallBrand* 返回result，通过result.isSuccess()判断服务调用是否成功* 通过result.getModel()得到新增mallBrand* @param mallBrand* @return*/public Result<MallBrand> addMallBrand(MallBrand mallBrand) ;/*** 按照主键id更新mallBrand，请重新newMallBrand 的更新对象，设置要更新的字段* 返回result，通过result.isSuccess()判断更新是否成功* @param id* @param mallBrand* @return*/public Result updateMallBrandById(MallBrandmallBrand);/*** 按照主键id 删除 记录* 返回result，通过result.isSuccess()判断删除是否成功* @param id* @return*/public Result deleteMallBrandById(MallBrandmallBrand);/*** 查询列表，此接口不包含分页查询* 返回result，通过result.isSuccess()判断服务调用是否成功* 通过result.getModel()得到列表信息* @param queryMallBrand* @return*/public Result<List<MallBrand>> getMallBrandsByQuery(QueryMallBrand queryMallBrand);/*** 通过主键id查询MallBrand* 返回result，通过result.isSuccess()判断服务调用是否成功* 通过result.getModel()得到查询的单条mallBrand信息* @param id* @return*/public Result<MallBrand> getMallBrandById(long id);/*** 查询列表，包含分页查询* 查询分页信息，请设置* QueryMallBrand.setIndex(设置当前页数)* QueryMallBrand.setPageSize(设置当前页面数据行数)* 返回result，通过result.isSuccess()判断服务调用是否成功* 通过result.getTotal()返回结果总数* 通过result.getModel()得到查询的单页列表信息* @param queryMallBrand* @return*/public Result<List<MallBrand>> getMallBrandsByPage(QueryMallBrand queryMallBrand);/*** 查询总数* @param queryMallBrand* @return*/public Result<Long>count(QueryMallBrand queryMallBrand);}


/*** Copyright(c) 2004-2020 pangzi*com.pz.basic.mall.service.sys.impl.MallBrandService.java*/
package com.pz.basic.mall.service.sys.impl;
import com.pz.basic.mall.dao.sys.MallBrandDao;import java.util.ArrayList;
import java.util.List;import com.pz.basic.mall.domain.base.Result;
import com.pz.basic.mall.domain.base.enums.DataActiveStatusEnum;
import com.pz.basic.mall.domain.base.enums.DataStatusEnum;
import com.pz.basic.mall.domain.sys.query.QueryMallBrand;
import com.pz.basic.mall.service.sys.MallBrandService;import com.pz.basic.mall.domain.sys.MallBrand;/**** @author pangzi* @date 2020-06-26 11:25:00*/
public class MallBrandServiceImpl implements MallBrandService {private MallBrandDao mallBrandDao;public void setMallBrandDao (MallBrandDaomallBrandDao) {this.mallBrandDao = mallBrandDao;}public Result<MallBrand>addMallBrand(MallBrand mallBrand) {Result<MallBrand>result = new Result<MallBrand>();try {QueryMallBrand query= new QueryMallBrand();query.setBrandName(mallBrand.getBrandName());long count =mallBrandDao.countByQuery(query);if(count>0){result.setSuccess(false);result.setMessage("品牌名已存在");returnresult;}mallBrand.setStatus(DataStatusEnum.STATUS_ENABLE.getStatusValue());mallBrand.setActive(DataActiveStatusEnum.STATUS_ACTIVE.getStatusValue());mallBrandDao.insertMallBrand(mallBrand);result.addDefaultModel(mallBrand);} catch(Exception e) {result.setSuccess(false);}return result;}public Result updateMallBrandById(MallBrandmallBrand) {Result result = new Result();try {int count=mallBrandDao.updateMallBrandByIdModified(mallBrand);if(count>0){result.setSuccess(true);}} catch(Exception e) {result.setSuccess(false);}return result;}public Result deleteMallBrandById(MallBrandmallBrand) {Result result = new Result();try {int count=0;MallBrandmodifiedMallBrand = new MallBrand();modifiedMallBrand.setId(mallBrand.getId());modifiedMallBrand.setActive(DataActiveStatusEnum.STATUS_DELETED.getStatusValue());count=mallBrandDao.updateMallBrandByIdModified(modifiedMallBrand);if(count>0){result.setSuccess(true);}} catch(Exception e) {result.setSuccess(false);}return result;}       public Result<List<MallBrand>>getMallBrandsByQuery(QueryMallBrand queryMallBrand) {Result<List<MallBrand>>result = new Result<List<MallBrand>>();try {queryMallBrand.setActive(DataActiveStatusEnum.STATUS_ACTIVE.getStatusValue());result.addDefaultModel("MallBrands",mallBrandDao.selectMallBrandByQuery(queryMallBrand));} catch(Exception e) {result.setSuccess(false);}return result;  }public Result<MallBrand>getMallBrandById(long id) {Result<MallBrand>result = new Result<MallBrand>();try {          result.addDefaultModel("MallBrand",mallBrandDao.selectMallBrandById(id));} catch(Exception e) {result.setSuccess(false);}return result;  }public Result<List<MallBrand>>getMallBrandsByPage(QueryMallBrand queryMallBrand) {Result<List<MallBrand>>result = new Result<List<MallBrand>>();queryMallBrand.setActive(DataActiveStatusEnum.STATUS_ACTIVE.getStatusValue());long totalItem =mallBrandDao.countByQuery(queryMallBrand);queryMallBrand.setTotalItem(totalItem);queryMallBrand.repaginate();if (totalItem > 0) {result.addDefaultModel(mallBrandDao.selectMallBrandByPage(queryMallBrand));} else {result.addDefaultModel(newArrayList<MallBrand>());}result.setTotalItem(totalItem);result.setPageSize(queryMallBrand.getPageSize());result.setPage(queryMallBrand.getPage());return result;}public Result<Long>count(QueryMallBrand queryMallBrand) {Result<Long> result =new Result<Long>();queryMallBrand.setActive(DataActiveStatusEnum.STATUS_ACTIVE.getStatusValue());try { result.addDefaultModel(mallBrandDao.countByQuery(queryMallBrand));} catch(Exception e) {result.setSuccess(false);}return result;  }}


/*** Copyright(c) 2004-2020 pangzi* com.pz.basic.mall.dao.sys.MallBrandDao.java*/
package com.pz.basic.mall.dao.sys;
import java.util.List;
import com.pz.basic.mall.domain.sys.MallBrand;
import com.pz.basic.mall.domain.sys.query.QueryMallBrand;import java.util.Map;
import java.io.Serializable;/**** @author pangzi* @date 2020-06-26 10:56:01*/
public interfaceMallBrandDao {/*** 根据条件查询总数* @param QueryMallBrand query* @return*/long countByQuery(QueryMallBrand query);/*** 根据条件删除记录* @param MallBrandQuery query* @return*/int deleteMallBrandByQuery(QueryMallBrandquery);/*** 根据ID删除记录* @param id* @return*/int deleteMallBrandById(long id);/*** 新增记录* @param MallBrand record* @return*/long insertMallBrand(MallBrand record);/*** 新增记录 注意：有值的记录才新增* @param MallBrand record* @return*/long insertMallBrandModified(MallBrandrecord);/*** 根据查询条件返回列表* @param QueryMallBrand query* @return*/List<MallBrand>selectMallBrandByQuery(QueryMallBrand query);/*** 根据查询条件返回列表* @param QueryMallBrand query* @return*/List<MallBrand> selectMallBrandByPage(QueryMallBrandquery);/*** 根据ID查询对象* @param Long id* @return*/MallBrand selectMallBrandById(long id);/*** 根据id修改记录 注意：有值的字段才更新* @param MallBrand record* @return*/int updateMallBrandByIdModified(MallBrandrecord);}

Mapper文件：


<?xmlversion="1.0" encoding="UTF-8" ?>
<!DOCTYPEmapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd" ><mappernamespace="com.pz.basic.mall.dao.sys.MallBrandDao"><resultMap id="ResultMap"type="MallBrand"><idproperty="id" column="id"/><idproperty="brandName" column="brand_name"/><idproperty="logo" column="logo"/><idproperty="firstChar" column="first_char"/><idproperty="status" column="status"/><idproperty="active" column="active"/><idproperty="createUser" column="create_user"/><idproperty="modifyUser" column="modify_user"/><idproperty="created" column="created"/><idproperty="modified" column="modified"/></resultMap><sql id="ALL_TABLE_COLOUM">   id,brand_name,logo,first_char,status,active,create_user,modify_user,created,modified</sql><sqlid="Query_Where_Clause" ><where >1=1<choose><when test="id != null and id !=''">and      id = #{id}</when><whentest="brandName != null and brandName != ''">and      brand_name =  #{brandName}</when><whentest="logo != null and logo != ''">and      logo = #{logo}</when><whentest="firstChar != null and firstChar != ''">and      first_char =  #{firstChar}</when><whentest="status != null and status != ''">and      status = #{status}</when><whentest="active != null and active != ''">and      active = #{active}</when><whentest="createUser != null and createUser != ''">and      create_user =  #{createUser}</when><whentest="modifyUser != null and modifyUser != ''">and      modify_user =  #{modifyUser}</when><whentest="created != null and created != ''">and      created = #{created}</when><whentest="modified != null and modified != ''">and      modified =  #{modified}</when></choose></where></sql><select id="selectMallBrandByQuery" resultMap="ResultMap"parameterType="QueryMallBrand" >select<includerefid="ALL_TABLE_COLOUM" />from mall_brand<if test="page != null" ><include refid="Query_Where_Clause"/></if></select><select id="selectMallBrandByPage" resultMap="ResultMap"parameterType="QueryMallBrand" >select<includerefid="ALL_TABLE_COLOUM" />from mall_brand<if test="page != null"><includerefid="Query_Where_Clause" /></if>LIMIT #{startRow},#{pageSize}</select><select id="selectMallBrandById"resultMap="ResultMap" parameterType="java.lang.Long" >select<include refid="ALL_TABLE_COLOUM"/>from mall_brandwhere id = #{id}</select><delete id="deleteMallBrandById"parameterType="java.lang.Integer" >delete from mall_brandwhere id = #{id}</delete><delete id="deleteMallBrandByQuery" parameterType= "QueryMallBrand">delete from mall_brand<if test="page != null" ><includerefid="Query_Where_Clause" /></if></delete><insert id="insertMallBrand"parameterType="MallBrand" >INSERT INTOmall_brand(id,brand_name,logo,first_char,status,active,create_user,modify_user,created,modified)VALUES(#{id},#{brandName},#{logo},#{firstChar},#{status},#{active},#{createUser},#{modifyUser},#{created},#{modified})<selectKey resultType="long"keyProperty="id">SELECT @@IDENTITY AS ID</selectKey></insert><insert id="insertMallBrandModified" parameterType="MallBrand" >insert into mall_brand<trim prefix="("suffix=")" suffixOverrides="," ><if test="id != null">id,</if><if test="brandName !=null" >brand_name,</if><if test="logo !=null" >logo,</if><if test="firstChar !=null" >first_char,</if><if test="status !=null" >status,</if><if test="active !=null" >active,</if><if test="createUser !=null" >create_user,</if><if test="modifyUser !=null" >modify_user,</if><if test="created !=null" >created,</if><if test="modified !=null" >modified,</if></trim><trim prefix="values ("suffix=")" suffixOverrides="," ><if test="id != null" >#{id},</if><if test="brandName != null" >#{brandName},</if><if test="logo != null" >#{logo},</if><if test="firstChar != null" >#{firstChar},</if><if test="status != null" >#{status},</if><if test="active != null" >#{active},</if><if test="createUser != null" >#{createUser},</if><if test="modifyUser != null" >#{modifyUser},</if><if test="created != null" >now(),</if><if test="modified != null" >now(),</if></trim><selectKey resultType="long"keyProperty="id">SELECT @@IDENTITY AS ID</selectKey></insert><select id="countByQuery"parameterType="QueryMallBrand" resultType="java.lang.Long" >select count(*) from mall_brand<if test="page != null" ><includerefid="Query_Where_Clause" /></if></select><update id="updateMallBrandByIdModified" parameterType="MallBrand">update mall_brand<set ><iftest="brandName != null" >brand_name =  #{brandName},</if><iftest="logo != null" >logo =  #{logo},</if><iftest="firstChar != null" >first_char =  #{firstChar},</if><iftest="status != null" >status =  #{status},</if><iftest="active != null" >active =  #{active},</if><iftest="createUser != null" >create_user =  #{createUser},</if><iftest="modifyUser != null" >modify_user =  #{modifyUser},</if><iftest="created != null" >created =  #{created},</if><iftest="modified != null" >modified=now(),</if></set>where id = #{id}</update></mapper>

以上就是品牌管理功能的基本代码，看上去，这些代码确实很多，而且mapper文件的编写，往往容易出错，当然，mybatis也提供了官方工具——Mybatis Genrator帮你生成代码。但是Mybatis Genrator生成的东西，在命名上有些固定，而且会生成的查寻类太过冗余，生成的痕迹太强，真拿那样的代码用到工作中去，容易被吐槽的。

废话不多说了，我们先观察这中基础类别代码的一个规律——根据数据库字段，进行简单的新增，编辑，删除功能。对于数据操作，持久时离不开数据实体，也就是我们常常说的domain类，而为了数据查询，会往往需要一个单独的查询类进行封装。从某个层面来讲，这种代码生成程序的基本思路就找到了——查询数据库表结构->生成对应实体->生成dao需要的mapper->生成dao接口。

如何才能做到这些事情呢？还记得猿思考系列里，工厂君给你提及的一些事情吗？DatabaseMetaData这个东西还记得吗？为了在命名时更加规范，方法名可以更加灵活，还记得动态模板技术吗？现在前后端分离了，JSP、velocity、freemarker这类后端渲染技术是用得少了一些，但是不是说就没有使用场景了噢。你可以使用这些东西来生成HTML页面返回给浏览器，为什么就不能使用这些东西输出成你需要的.java文件还有.xml文件呢？技术这玩意儿，有时候还是需要一点想象力哒。

嗯，工厂君这套代码生成轮子，基本上就是这个套路了，DatabaseMetaData来解决数据库字段和java字段的映射问题，使用velocity的模板技术来渲染生成需要的代码文件。我们可以一起来看下。

数据库里的字段名，和java种的字段名往往不一致，要实现，数据库字段，到domain字段的映射，我们需要先对字段进行抽象，那么字段这个类自然会具有以下几个属性。


/*** Copyright(c) 2004-2020 pangzi* Field.java*/
package com.pz.cg.db;public class Field {//java属性名private String propertyName;//字段名private String fieldName;//java数据完整类型private String javaFullType;//java数据类型private String javaType;//数据库字段类型private String jdbcType;//getter名private String getterName;//setter名private String setterName;//数据库字段注释private String comment;//长度private int length;}

既然已经提及到了需要通过数据库的来生成我们需要的代码，对于数据库的访问自然是少不了的，我们简单封装一个数据库连接池的工具类。


/*** Copyright(c) 2004-2020 pangzi* ConnectionPool.java*/
package com.pz.cg.db;import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.Properties;import com.pz.cg.GenerateEngine;
import org.apache.log4j.Logger;public class ConnectionPool {private static Properties prop = newProperties();private static String userName;private static String password;private static String url;private static String driver;private static Logger log =Logger.ge tLogger(GenerateEngine.class);static {try {prop =GenerateEngine.getProp();userName =prop.getProperty("jdbc.username");password =prop.getProperty("jdbc.password");url =prop.getProperty("jdbc.url");driver =prop.getProperty("jdbc.driver");} catch (Exception ex) {ex.printStackTrace();}}public static void close(Connectionconn) {try {if (conn != null) {conn.close();conn =null;}} catch (Exception e) {e.printStackTrace();}}public static void close(Statement st){try {if (st != null) {st.close();st = null;}} catch (Exception e) {e.printStackTrace();}}public static void close(ResultSet rs){try {if (rs != null) {rs.close();rs = null;}} catch (Exception e) {e.printStackTrace();}}public static ConnectiongetConnection() {Connection con = null;log.info("正在连接到数据库...");try {Class.forName(driver);con =DriverManager.getConnection(url, userName, password);} catch (Exception e) {e.printStackTrace();log.info("连接数据库失败",e);}return con;}}

我们都知道，数据库字段的命名规范，往往是英文单词加下划线的形式出现的，而java字段的命名规范，往往是驼峰式的命名。为此了方便我们进行数据处理，我们封装一个工具类吧。


/*** Copyright(c) 2004-2020 pangzi* MetaDataUtil.java*/
package com.pz.cg.db.util;import java.sql.Connection;
import java.util.HashMap;
import java.util.Map;import org.apache.commons.lang.CharUtils;
import org.apache.commons.lang.StringUtils;public class MetaDataUtil {public static Map<String, String>getTableColumns(Connection con, String tableName) {Map<String, String>columns = new HashMap<String, String>();return columns;}public static String createSetterName(StringfieldName) {return "set" +fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1);}public static StringcreateGetterName(String fieldName) {return "get" +fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1);}public static StringcreateJavaType(String dbJavaType) {String javaType =dbJavaType.substring(dbJavaType.lastIndexOf(".") + 1);//将jdbc的Timedstamp变为Date类型if("Timestamp".equals(javaType)) {javaType ="Date";}return javaType;}public static String propertyToField(Stringproperty) { if (null == property) { return ""; } char[] chars =property.toCharArray(); StringBuffer sb = newStringBuffer(); for (char c : chars) { if (CharUtils.isAsciiAlphaUpper(c)){ sb.append("_" +StringUtils.lowerCase(CharUtils.toString(c))); } else { sb.append(c); } } return sb.toString(); } public static String fieldToProperty(Stringfield) { if (null == field) { return ""; } char[] chars =field.toCharArray(); StringBuffer sb = newStringBuffer(); for (int i = 0; i < chars.length;i++) { char c = chars[i]; if (c == '_') { int j = i + 1; if (j < chars.length) { sb.append(StringUtils.upperCase(CharUtils.toString(chars[j]))); i++; } } else { sb.append(c); } } return sb.toString(); }}

好了，接下来，我们就要为生成代码做一些准备了，编写我们需要的核心代码了。不过在这之前，还有一些问题需要解决。比如，我们需要连接的数据库实例在哪里？我们需要生成的代码存放在哪里？代码的包结构如何定义？这些东西，为了灵活起见，我们定义一个配置文件吧。我们在resoures目录下建立一个conf/config-local.properties的配置文件。

## databaseconnection setting
jdbc.driver=com.mysql.jdbc.Driverjdbc.url=jdbc:mysql://127.0.0.1:3306/pz_mall_basic?characterEncoding=utf-8
jdbc.username=root
jdbc.password=13456## encodingsetting ##
in.encoding=utf-8
out.encoding=utf-8## class metadata setting ##
class.author=pangzi
package=com.pz.basic.mall
##package.catalog=## packagesetting ##
package.domain=domain.brand
package.dao=dao.brand
package.manager=manager.brand
package.service=service.brand
package.action=controller.brand
package.querydomain=domain.brand.query## file out pathsetting ##
domain.out.path=D:/workspace-pangzi/pangzi-client/src/main/java
querydomain.out.path=D:/workspace-pangzi/pangzi-client/src/main/java
dao.out.path=D:/workspace-pangzi/pangzi-dao/src/main/java
manager.out.path=D:/workspace-pangzi/pangzi-manager/src/main/java
sqlmap.out.path=D:/workspace-pangzi/pangzi-dao/src/main/resources/sqlmapservice.out.path=D:/workspace-pangzi/pangzi-service/src/main/javaaction.out.path=D:/workspace-pangzi/pangzi-controller/src/main/java## code templatesetting ##
## domain ##
domain=pojo.vm
## query##
querydomain=querypojo.vm
##分页##
querybase=PaginateBaseDO.vm
##dao##
dao=dao.vm
##dao实现类##
dao.impl=dao.impl.vm
##测试类##
dao.test=
##manager##
manager=manager.vm
##manager实现##
manager.impl=manager.impl.vm
##service##
service=service.vm
##service实现##
service.impl=service.impl.vm
##mapper##
sqlmap=sql_map.vm

考虑到Controller层在实际的应用场景种，会需要编写页面逻辑以及很多后端验证性的代码，用代码生成的方式去编写，意义不是很大。对于相对简单的系统而言，manager层存在的意义不是很大，所以我们重点需要的是domin,query,dao,service,以及重中之重的mapper文件。

架子已经搭好了，我们的重头戏来了，读取配置文件，然后生成对应的代码的事情需要开始了。


/*** Copyright(c) 2004-2020 pangzi* GenerateEngine.java*/
package com.pz.cg;import com.pz.cg.db.ConnectionPool;
import com.pz.cg.db.Field;
import com.pz.cg.db.util.MetaDataUtil;
import com.pz.cg.test.CgTest;
import org.apache.commons.io.FileUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang.time.DateFormatUtils;
import org.apache.log4j.Logger;
import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.Velocity;import java.io.*;
import java.sql.*;
import java.util.*;public classGenerateEngine {protected static final String FIELDS ="fields";protected static final StringPACKAGE_NAME = "package";protected static final StringCLASS_NAME = "className";protected static final StringQUERY_CLASS_NAME = "queryClassName";protected static final StringTABLE_NAME = "tableName";protected static final String INST_NAME= "instName";protected static final StringQUERY_INST_NAME = "queryInstName";protected static final String IMPORTS ="imports";protected static final String AUTHOR ="author";protected static final String PK_ID ="pkid";protected static final String PK_TYPE="pkType";protected static final String PK_FILED="pkFiled";protected static final StringPK_SIMPLE_TYPE= "pkSimpleType";protected static final String PK_NAME ="pkname";public static final String configFile ="config.properties";protected static Properties prop = newProperties();protected static Map<String,Object> context = null;protected static Map<String,Object> commonContext = null;protected String tableName;protected String className ="";public String classType = "";protected String queryClassType ="";protected static final String ANOTATION= "annotation";protected static final String DOMAIN ="domain";protected static final String DAO ="dao";protected static final String DAO_IMPL= "dao.impl";protected static final String DAO_TEST= "dao.test";protected static final String MANAGER ="manager";protected static final StringMANAGER_IMPL = "manager.impl";protected static final String SERVICE ="service";protected static final StringSERVICE_IMPL = "service.impl";protected static final String SQL_MAP ="sqlmap";protected static final StringQUERYDOMAIN = "querydomain";private String location;private String fileName;private String packagee;private Set<String> imports = newHashSet<String>();private String template;private static Logger log =Logger.getLogger(GenerateEngine2.class);protected String getSecondDir() {if(StringUtils.isEmpty(prop.getProperty(PACKAGE_NAME + ".catalog"))) {return "";} else {return "."+ prop.getProperty(PACKAGE_NAME + ".catalog");}}static {try {log.info("正在初始化环境...");context = newHashMap<String, Object>();File file =FileUtils.toFile(CgTest.class.getResource("/conf/config-local.properties"));prop.load(newFileInputStream(file));} catch (IOException e) {e.printStackTrace();log.info("始化环境失败",e);}}protected void init(String classType) {this.classType = classType;this.queryClassType ="query"+classType;if (commonContext == null) {initCommonContext();}initClassMetaInfo();intitLocation();this.setTemplate(prop.getProperty(classType));}//根据配置完成数据库到字段的映射protected void initCommonContext() {commonContext = newHashMap<String, Object>();List<Field> fields =new ArrayList<Field>();Connection conn = null;Statement st = null;ResultSet rs = null;Set<String> ip = null;Field pkField = new Field();String pkId = "";String pkName = "";String pkType = "";String pkSimpleType ="";Map<String, String>comment = new HashMap<String, String>();try {log.info("正在初始化表:"+ tableName + "元数据...");conn =ConnectionPool.getConnection();DatabaseMetaData dmd= conn.getMetaData();rs =dmd.getPrimaryKeys(null, null, tableName);if (rs.next()) {pkId =rs.getString("COLUMN_NAME");pkName =rs.getString("PK_NAME");}// 获取得列的注释rs =dmd.getColumns(null, null, tableName, null);int ix = 1;while(rs.next()) {comment.put(String.valueOf(ix),rs.getString("REMARKS"));ix += 1;}st =conn.createStatement();rs =st.executeQuery("select * from " + tableName);ResultSetMetaDatameta = rs.getMetaData();Field field = null;String propertyName= "";String fieldName ="";String javaType ="";ip = newHashSet<String>();System.out.println(meta.getColumnCount());for (int i = 1; i<= meta.getColumnCount(); i++) {fieldName =meta.getColumnName(i);javaType =meta.getColumnClassName(i);propertyName= MetaDataUtil.fieldToProperty(fieldName);field = newField();field.setPropertyName(propertyName);field.setFieldName(meta.getColumnName(i));field.setSetterName(MetaDataUtil.createSetterName(propertyName));field.setGetterName(MetaDataUtil.createGetterName(propertyName));field.setJavaType(MetaDataUtil.createJavaType(meta.getColumnClassName(i)));field.setJdbcType(meta.getColumnTypeName(i));field.setJavaFullType(meta.getColumnClassName(i));field.setComment(comment.get(String.valueOf(i)));fields.add(field);if(field.getJavaFullType().indexOf("java.lang") == -1) {ip.add(field.getJavaFullType());}//一定要放在最后if(pkId.equals(fieldName)) {pkType= javaType;pkSimpleType= MetaDataUtil.createJavaType(meta.getColumnClassName(i));if(pkSimpleType.equals("Integer")) {pkSimpleType= "int";}else if (pkSimpleType.equals("Long")) {pkSimpleType= "long";}pkField= field;}}} catch (Exception e) {e.printStackTrace();log.info("初始化表:" +tableName + "元数据失败", e);} finally {ConnectionPool.close(rs);ConnectionPool.close(st);ConnectionPool.close(conn);}commonContext.put(CLASS_NAME,className);commonContext.put(TABLE_NAME,tableName);commonContext.put(INST_NAME,className.substring(0, 1).toLowerCase() + className.substring(1));commonContext.put(QUERY_INST_NAME,"query"+className);commonContext.put(INST_NAME,className.substring(0, 1).toLowerCase() + className.substring(1));commonContext.put(FIELDS,fields);commonContext.put(PK_ID,pkId);commonContext.put(PK_SIMPLE_TYPE,pkSimpleType);commonContext.put(PK_NAME,pkName);commonContext.put(PK_TYPE,pkType);commonContext.put(PK_FILED,pkField);context.putAll(commonContext);if("true".equals(prop.getProperty(ANOTATION))) {context.put("Resource","@Resource");context.put("Component","@Component");}this.setImports(ip);log.info("元数据初始化完成.");System.out.println();}public void intitLocation() {String path =this.getPackagee();location =prop.getProperty(this.classType + ".out.path");// 为减少配置,config.properties中并没有配置impl的输出位置// 因此在生成impl类时需要替换其中中impl获取得其接口的输出位置if(StringUtils.isBlank(location)) {String str ="";// 替换掉impl用接口的输出位置// 如:在生成dao.impl时,实际上取的是配置文件中// dao.out.path的值if(this.classType.indexOf(".impl") != -1) {str =this.classType.substring(0, this.classType.indexOf(".impl"));}location =prop.getProperty(str + ".out.path");}// 除了sqlmap之外其它文件的输出位置均与package有关if(StringUtils.isNotBlank(path)) {path =path.replace(".", System.getProperty("file.separator"));location += System.getProperty("file.separator") + path;}location += System.getProperty("file.separator");try {FileUtils.forceMkdir(newFile(location));} catch (IOException e) {e.printStackTrace();}}public void initClassMetaInfo() {context.put(PACKAGE_NAME,this.getPackagee());context.put(AUTHOR,prop.getProperty("class.author"));context.put("year",DateFormatUtils.format(System.currentTimeMillis(), "yyyy"));context.put("dateTime",DateFormatUtils.format(System.currentTimeMillis(), "yyyy-MM-ddHH:mm:ss"));}public void generate() {try {log.info("正在生成 " +context.get(CLASS_NAME) + " -> " + this.classType + "代码...");Properties p = newProperties();p.put("resource.loader","file");p.put("file.resource.loader.class","org.apache.velocity.runtime.resource.loader.FileResourceLoader");p.put("file.resource.loader.path",FileUtils.toFile(CgTest.class.getResource("/com/pz/cg/vm/")).getAbsolutePath());p.put("input.encoding",prop.getProperty("in.encoding"));p.put("output.encoding",prop.getProperty("out.encoding"));Velocity.init(p);//Template template= Velocity.getTemplate("./resources/com/pz/cg/vm/" +this.getTemplate());Template template =Velocity.getTemplate(this.getTemplate());VelocityContext ctx= new VelocityContext(context);//Writer writer =new StringWriter();Writer writer = newBufferedWriter(new OutputStreamWriter(new FileOutputStream(newFile(this.getLocation() + "/" + this.getFileName())),prop.getProperty("out.encoding")));template.merge(ctx,writer);writer.flush();writer.close();log.info("生成 " +context.get(CLASS_NAME) + " -> " + this.classType + "代码结束.");log.info("输出位置:" +this.getLocation() + this.getFileName());System.out.println();} catch (Exception e) {e.printStackTrace();}}protected String getLocation() {return location;}protected void setLocation(Stringlocation) {this.location = location;}protected String getFileName() {return this.fileName;}protected void setFileName(StringfileName) {this.fileName = fileName;}protected String getPackagee() {return packagee;}public void setPackagee(Stringpackagee) {this.packagee = packagee;}protected Set<String>getImports() {return imports;}protected voidsetImports(Set<String> imports) {this.imports = imports;}protected String getTemplate() {return template;}protected void setTemplate(Stringtemplate) {this.template = template;}public static Properties getProp() {return prop;}//清理common上下文public static void clearContext() {commonContext = null;}
}

输入输出的核心问题解决了，我们可以看看具体到每一种类型的代码生成了，我们为每一种需要的类型，编写一种具体的生成器就可以了。


package com.pz.cg.gen;import java.util.HashSet;
import java.util.Set;import com.pz.cg.CodeGenerator;
import com.pz.cg.GenerateEngine;/*** 生成一些基本类，例如queryDO,resultDO等* @author pangzi**/
public class BaseGenerator extends GenerateEngine implements CodeGenerator {public void generate(String tableName,String className) {//由PaginateBaseDO.vm生成PaginateBaseDO.javathis.classType = QUERYDOMAIN;this.setTemplate("PaginateBaseDO.vm");this.setFileName("PaginateBaseDO.java");this.setPackagee(prop.getProperty(GenerateEngine.PACKAGE_NAME)+ "." + prop.getProperty("package.querydomain"));initClassMetaInfo();intitLocation();         this.generate();//由Result.vm生成Result.javathis.classType = DOMAIN;this.setTemplate("Result.vm");this.setFileName("Result.java");this.setPackagee(prop.getProperty(GenerateEngine.PACKAGE_NAME)+ ".domain.base" );this.setImports(getResultImport());initClassMetaInfo();intitLocation();         this.generate();//生成BaseDOthis.classType = DOMAIN;this.setTemplate("BaseDO.vm");this.setFileName("BaseDO.java");this.setPackagee(prop.getProperty(GenerateEngine.PACKAGE_NAME)+ ".domain.base");this.setImports(getResultImport());initClassMetaInfo();intitLocation();         this.generate();//生成输出文件格式this.classType = DOMAIN;this.setTemplate("NoNullFieldStringStyle.vm");this.setFileName("NoNullFieldStringStyle.java");this.setPackagee(prop.getProperty(GenerateEngine.PACKAGE_NAME)+ ".domain.base" );this.setImports(getResultImport());initClassMetaInfo();intitLocation();         this.generate();                }public Set<String>getResultImport() {Set<String> imports =new HashSet<String>();imports.add(prop.getProperty(PACKAGE_NAME)+ ".domain.base"  +".PaginateBaseDO" );context.put(IMPORTS,imports);return imports;}
}

/*** Copyright(c) 2004-2020 pangzi* com.pz.cg.gen.PojoCodeGenerator.java*/
package com.pz.cg.gen;import java.util.HashSet;
import java.util.Set;import com.pz.cg.CodeGenerator;
import com.pz.cg.GenerateEngine;/*** @author pangzi**/
public class PojoGenerator extends GenerateEngine implements CodeGenerator {public void generate(String tableName,String className) {this.tableName = tableName;this.className = className;this.setFileName(this.className+ ".java");this.setPackagee(prop.getProperty(PACKAGE_NAME)+ "." + prop.getProperty("package.domain") +this.getSecondDir());this.init(DOMAIN);context.put(IMPORTS,this.getPojoImports());this.generate();}protected Set<String>getPojoImports() {Set<String> imports =new HashSet<String>();imports.add(prop.getProperty(PACKAGE_NAME)  + ".domain.base.BaseDO");return imports;}
}

/****/
package com.pz.cg.gen;import java.util.HashSet;
import java.util.Set;import com.pz.cg.CodeGenerator;
import com.pz.cg.GenerateEngine;/*** @author pangzi**/
public class QueryPojoGenerator extends GenerateEngine implements CodeGenerator {public void generate(String tableName,String className) {this.tableName = tableName;this.className = className;this.setFileName("Query"+this.className + ".java");this.setPackagee(prop.getProperty(PACKAGE_NAME)+ "." + prop.getProperty("package.querydomain") +  this.getSecondDir());this.setImports(getImport());this.init(QUERYDOMAIN);context.put(IMPORTS,this.getImports());this.generate();}public Set<String> getImport() {Set<String> imports =new HashSet<String>();imports.add(prop.getProperty(PACKAGE_NAME)+ ".domain.base.PaginateBaseDO" );context.put(IMPORTS,imports);return imports;}
}

/*** Copyright(c) 2004-2020 pangzi* com.pz.cg.gen.DaoCodeGenerator.java*/
package com.pz.cg.gen;import java.util.HashSet;
import java.util.Set;import com.pz.cg.CodeGenerator;
import com.pz.cg.GenerateEngine;public class DaoGenerator extends GenerateEngine implements CodeGenerator {public void generate(String tableName,String className) {this.tableName = tableName;this.className = className;this.setFileName(this.className+ "Dao" + ".java");this.setPackagee(prop.getProperty(PACKAGE_NAME)+ "." + prop.getProperty("package.dao") +this.getSecondDir());this.setImports(this.getDaoImport());this.init(DAO);this.generate();this.generateImpl(tableName,className);}private void generateImpl(StringtableName, String className) {this.tableName = tableName;this.className = className;this.setFileName(this.className+ "DaoImpl" + ".java");this.setPackagee(prop.getProperty(PACKAGE_NAME)+ "." + prop.getProperty("package.dao") +  this.getSecondDir() + ".impl");this.setTemplate(prop.getProperty("dao.impl"));this.setImports(this.getDaoImplImport());this.init(DAO_IMPL);this.generate();}public Set<String> getDaoImport(){Set<String> imports =new HashSet<String>();imports.add("java.util.List");imports.add(prop.getProperty(PACKAGE_NAME)+ "." + prop.getProperty("package.querydomain")+this.getSecondDir()  + "."+"Query"+ className);imports.add(prop.getProperty(PACKAGE_NAME)+ "." + prop.getProperty("package.domain") +this.getSecondDir()  + "." +className);context.put(IMPORTS,imports);return imports;}public Set<String>getDaoImplImport() {Set<String> imports =new HashSet<String>();imports.add("java.util.List");imports.add(prop.getProperty(PACKAGE_NAME)+ "." + prop.getProperty("package.domain") +  this.getSecondDir()  + "." + className);imports.add(prop.getProperty(PACKAGE_NAME)+ "." + prop.getProperty("package.querydomain")+this.getSecondDir()  + ".Query"+ className);imports.add(prop.getProperty(PACKAGE_NAME)+ "." + prop.getProperty("package.dao") +  this.getSecondDir()  + "." + className +"Dao");context.put(IMPORTS,imports);return imports;}}


package com.pz.cg.gen;import java.util.HashSet;
import java.util.Set;import com.pz.cg.CodeGenerator;
import com.pz.cg.GenerateEngine;public class ServiceGenerator extends GenerateEngine implements    CodeGenerator {public void generate(String tableName,String className) {this.tableName = tableName;this.className = className;this.setFileName(this.className+ "Service" + ".java");this.setPackagee(prop.getProperty(PACKAGE_NAME)+ "." + prop.getProperty("package.service") +this.getSecondDir());this.setImports(this.getServiceImport());this.init(SERVICE);this.generate();this.generateImpl(tableName,className);}private void generateImpl(StringtableName, String className) {this.tableName = tableName;this.className = className;this.setFileName(this.className+ "ServiceImpl" + ".java");this.setPackagee(prop.getProperty(PACKAGE_NAME)+ "." + prop.getProperty("package.service") +  this.getSecondDir() + ".impl");this.setTemplate(prop.getProperty("service.impl"));this.setImports(this.getServiceImplImport());this.init(SERVICE_IMPL);this.generate();}public Set<String>getServiceImport() {Set<String> imports =new HashSet<String>();imports.add("java.util.List");imports.add(prop.getProperty(PACKAGE_NAME)+ "." + prop.getProperty("package.domain") +".Result" );            imports.add(prop.getProperty(PACKAGE_NAME)+ "." + prop.getProperty("package.domain") +this.getSecondDir()  + "." +className);imports.add(prop.getProperty(PACKAGE_NAME)+ "." + prop.getProperty("package.querydomain")+this.getSecondDir()  + ".Query"+ className);context.put(IMPORTS,imports);return imports;}public Set<String>getServiceImplImport() {Set<String> imports =new HashSet<String>();imports.add("java.util.List");imports.add(prop.getProperty(PACKAGE_NAME)+ "." + prop.getProperty("package.domain") +".Result" );            imports.add(prop.getProperty(PACKAGE_NAME)+ "." + prop.getProperty("package.domain") +this.getSecondDir()  + "." +className);imports.add(prop.getProperty(PACKAGE_NAME)+ "." + prop.getProperty("package.querydomain")+this.getSecondDir()  + ".Query"+ className);imports.add(prop.getProperty(PACKAGE_NAME)+ "." + prop.getProperty("package.dao") +this.getSecondDir()  + "." +className + "Dao");imports.add(prop.getProperty(PACKAGE_NAME)+ "." + prop.getProperty("package.service") +this.getSecondDir() + "." + className + "Service");context.put(IMPORTS,imports);return imports;}}package com.pz.cg.gen;import com.pz.cg.CodeGenerator;
import com.pz.cg.GenerateEngine;public class SqlMapGenerator extends GenerateEngine implements CodeGenerator {public static String SQL_DOMAIN ="sqlDomain";public static String SQL_QUERYDOMAIN ="sqlQueryDomain";public static String DAO_DOMAIN ="daoDomain";public void generate(String tableName,String className) {this.tableName = tableName;this.className = className;this.setFileName(this.className+ "Mapper.xml");//设置sqlmap的domain和querydomain 的packagecontext.put(SQL_DOMAIN,prop.getProperty(PACKAGE_NAME) + "." +prop.getProperty("package.domain") + this.getSecondDir()  + "." + className);context.put(SQL_QUERYDOMAIN,prop.getProperty(PACKAGE_NAME) + "." +prop.getProperty("package.querydomain")+ this.getSecondDir()  + ".Query" + className);context.put(DAO_DOMAIN,prop.getProperty(PACKAGE_NAME) + "." +prop.getProperty("package.dao") + this.getSecondDir()  + "." + className);this.init(SQL_MAP);this.generate();}}

接下来就是你的重中之重的事情来了——为每一种你需要的代码，编写具体的vm模板文件。

Domian的基类模板 BaseDO.vm：

/*** Copyright(c) 2004-$!year pangzi* $!{package}.$!{className}.java*/
package $!package;import java.io.Serializable;import org.apache.commons.lang3.builder.ToStringBuilder;import $!{package}.NoNullFieldStringStyle;/**** @author $!author* @date $!dateTime***/
public class BaseDO implements Serializable {private static final longserialVersionUID = 1L;/*** 如果字段值为null将不包含在toString中*/@Overridepublic String toString() {returnToStringBuilder.reflectionToString(this);}
}

查询基础类模板 PaginateBaseDO.vm:

/**
* Copyright(c)2004-$!year pangzi
*$!{package}.PaginateBaseDO.java
*/
package $!{package};
import java.io.Serializable;
/**
*
* @author$!author
* @date$!dateTime
*
*
*/
public class PaginateBaseDO{
/**
* 默认每页的记录数量
*/
public staticfinal int PAGESIZE_DEFAULT = 20;
/**
* 每页大小
*/
private int pageSize;
/**
* 当前页。第一页是1
*/
private int index;/**
* 总记录数
*/
private int totalItem;
/**
* 总页数
*/
private int totalPage;/**
* 分页后的记录开始的地方
* 第一条记录是1
*/
private int startRow;
/**
* 分页后的记录结束的地方
*/
private int endRow;/**排序字段**/
private String orderField;/**升序 还是 降序,true为升序，false为降序*/
private Boolean isAsc;/**
* 默认构造方法
*/
public PaginateBaseDO() {
repaginate();
}/**
* 带当前页和页大小的构造方法
* @param index 当前页
* @parampageSize 页大小
*/
public PaginateBaseDO(int index, int pageSize) {
this.index =index;
this.pageSize =pageSize;
repaginate();
}public void setStartRow(int startRow) {
this.startRow =startRow;
}public void setEndRow(int endRow) {
this.endRow =endRow;
}/**
* 表示是不是第一页
* @return true 是; false 不是
*/
public boolean isFirstPage(){
return index<= 1;
}public boolean isMiddlePage() {
return!(isFirstPage() || isLastPage());
}public boolean isLastPage() {
return index>= totalPage;
}public boolean isNextPageAvailable() {
return!isLastPage();
}public boolean isPreviousPageAvailable() {
return!isFirstPage();
}/**
* 下一页号
* @return 取得下一页号
*/
public int getNextPage() {
if(isLastPage()){
returntotalItem;
} else {
return index+1;
}
}public int getPreviousPage() {
if(isFirstPage()){
return 1;
} else {
return index -1;
}
}
/**
* MethodgetPageSize returns the pageSize of this PaginatedArrayList object.
*
*  每页大小
*
* @return thepageSize (type int) of this PaginatedArrayList object.
*/public int getPageSize() {
return pageSize;
}/**
* MethodsetPageSize sets the pageSize of this PaginatedArrayList object.
*
*  每页大小
*
* @parampageSize the pageSize of this PaginatedArrayList object.
*
*/public void setPageSize(int pageSize) {
this.pageSize =pageSize;
repaginate();
}/**
* MethodgetIndex returns the index of this PaginatedArrayList object.
*
*  当前页。第一页是1
*
* @return theindex (type int) of this PaginatedArrayList object.
*/public int getIndex() {
return index;
}/**
* MethodsetIndex sets the index of this PaginatedArrayList object.
*
*  当前页。第一页是1
*
* @param indexthe index of this PaginatedArrayList object.
*
*/public void setIndex(int index) {
this.index =index;
repaginate();
}/**
* MethodgetTotalItem returns the totalItem of this PaginatedArrayList object.
*
*  总记录数
*
* @return thetotalItem (type int) of this PaginatedArrayList object.
*/public int getTotalItem() {
returntotalItem;
}/**
* MethodsetTotalItem sets the totalItem of this PaginatedArrayList object.
*
*  总记录数
*
* @paramtotalItem the totalItem of this PaginatedArrayList object.
*
*/public void setTotalItem(int totalItem) {
this.totalItem =totalItem;
if(this.totalItem <= 0){
totalPage = 0;
index = 1;
startRow = 0;
}
repaginate();
}/**
* MethodgetTotalPage returns the totalPage of this PaginatedArrayList object.
*
*  总页数
*
* @return thetotalPage (type int) of this PaginatedArrayList object.
*/public int getTotalPage() {
return totalPage;
}/**
* MethodgetStartRow returns the startRow of this PaginatedArrayList object.
*
*  分页后的记录开始的地方
*
* @return thestartRow (type int) of this PaginatedArrayList object.
*/public int getStartRow() {
if (startRow> 0) {
return startRow;
}
if (index <=0) {
index = 1;
}
return (index -1) * pageSize;
}/**
* MethodgetEndRow returns the endRow of this PaginatedArrayList object.
*
*  分页后的记录结束的地方
*
* @return theendRow (type int) of this PaginatedArrayList object.
*/public int getEndRow() {
if (endRow >0) {
return endRow;
}
return index *pageSize;
}public String getOrderField() {
returnorderField;
}public void setOrderField(String orderField) {
this.orderField= orderField;
}public Boolean getIsAsc() {
return isAsc;
}public void setIsAsc(Boolean isAsc) {
this.isAsc =isAsc;
}/**
* Methodrepaginate ...
*/
public void repaginate() {
if (pageSize< 1) { //防止程序偷懒，list和分页的混合使用
pageSize =PAGESIZE_DEFAULT;
}
if (index <1) {
index = 1;//恢复到第一页
}
if (totalItem> 0) {
totalPage =totalItem / pageSize + (totalItem % pageSize > 0 ? 1 : 0);
if(index >totalPage) {
index =totalPage; //最大页
}
endRow = index *pageSize;
startRow =(index - 1) * pageSize;
if(endRow>totalItem){
endRow =totalItem;
}
}
}
}

Domain 模板 pojo.vm:

/*** Copyright(c) 2004-$!year pangzi* $!{package}.$!{className}.java*/
package $!package;import java.util.Date;
#foreach($importin $imports)
import $import;
#end/**** @author $!author* @date $!dateTime**/
public class $!className extends BaseDO {#foreach($fieldin $fields)/**$!field.comment**/private $!field.javaType$!field.propertyName;#endpublic $!className() {}#foreach($fieldin $fields)public $!field.javaType$field.getGetterName()() {return $field.propertyName;}public void $field.getSetterName()($!field.javaType $!field.propertyName) {this.$!field.propertyName =$!field.propertyName;}#end}

Query 模板 querypojo.vm:


/*** Copyright(c) 2004-$!year pangzi* $!{package}.$!{className}.java*/
package $!package;
import java.util.Date;
#foreach($importin $imports)
import $import;
#end/**** @author $!author* @date $!dateTime***/
public class Query$!className extends PaginateBaseDO {#foreach($fieldin $fields)/**$!field.comment**/private $!field.javaType$!field.propertyName;#end#foreach($fieldin $fields)public $!field.javaType$field.getGetterName()() {return $field.propertyName;}public void $field.getSetterName()($!field.javaType $!field.propertyName) {this.$!field.propertyName =$!field.propertyName;}#end}

Dao 模板 dao.vm:


/*** Copyright(c) 2004-$!year pangzi* $!{package}.$!{className}Dao.java*/
package $!{package};
#foreach($importin $imports)
import $import;
#end
import java.util.Map;
import java.io.Serializable;/**** @author $!author* @date $!dateTime*/
public interface $!{className}Dao {/*** 根据条件查询总数* @param Query$!{className} query* @return*/$!pkSimpleType countByQuery(Query$!{className} query);/*** 根据条件删除记录* @param $!{className}Query query* @return*/int delete$!{className}ByQuery(Query$!{className} query);/*** 根据ID删除记录* @param id* @return*/int delete$!{className}ById($!pkSimpleType$!{pkid});/*** 新增记录* @param $!{className} record* @return*/$!pkSimpleType insert$!{className}($!{className} record);/*** 新增记录 注意：有值的记录才新增* @param $!{className} record* @return*/$!pkSimpleType insert$!{className}Modified($!{className} record);/*** 根据查询条件返回列表* @param Query$!{className} query* @return*/List<$!{className}> select$!{className}ByQuery(Query$!{className} query);/*** 根据查询条件返回列表* @param Query$!{className} query* @return*/List<$!{className}> select$!{className}ByPage(Query$!{className} query);/*** 根据ID查询对象* @param Long id* @return*/$!{className} select$!{className}ById($!pkSimpleType $!{pkid});/*** 根据id修改记录 注意：有值的字段才更新* @param $!{className} record* @return*/int update$!{className}ByIdModified($!{className}record);}

mapper 模板sql_map.vm:


#set($mapName ="$!{className.toUpperCase()}-MAP")
#set($insertSql= "")
#set($insertFields= "")
#set($pageCommonSql= "PAGE-COMMON")
#set($queryCommonSql= "QUERY-COMMON")
#set($exampleCommonSql= "EXAMPLE-COMMON")
<?xmlversion="1.0" encoding="UTF-8" ?>
<!DOCTYPEmapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd" ><mappernamespace="$!{daoDomain}Dao"><typeAliasalias="$!{className}" type="$!{sqlDomain}"/><typeAliasalias="Query$!{className}" type="$!{sqlQueryDomain}"/><resultMap id="ResultMap"type="$!{className}">#foreach($field in $fields)<id property="$!{field.propertyName}"column="$!{field.fieldName}"/>#set($insertSql =$insertSql + "#{" + $!{field.propertyName} + "}" +",")#set($insertFields =$insertFields + $!{field.fieldName} + ",")#end#if($!$insertSql.endsWith(","))#set($insertSql =$!insertSql.substring(0, $insertSql.lastIndexOf(",")))#end#if($!$insertFields.endsWith(","))#set($insertFields =$!insertFields.substring(0, $insertFields.lastIndexOf(",")))#end</resultMap><sqlid="ALL_TABLE_COLOUM">   #set($index=1)#foreach($field in $fields)#if($index==$fields.size())$!{field.fieldName}#else$!{field.fieldName},#end#set($index =$index+1)#end</sql><sqlid="Query_Where_Clause" ><where >1=1#foreach($field in $fields)<iftest="$!{field.propertyName} != null and $!{field.propertyName} !=''">and $!field.fieldName = #{$!{field.propertyName}}</if>#end</where></sql><select id="select$!{className}ByQuery"resultMap="ResultMap" parameterType="Query$!{className}">select<includerefid="ALL_TABLE_COLOUM" />from $!{tableName}<if test="page != null" ><includerefid="Query_Where_Clause" /></if></select><selectid="select$!{className}ByPage" resultMap="ResultMap"parameterType="Query$!{className}" >select<includerefid="ALL_TABLE_COLOUM" />from $!{tableName}<if test="page != null"><includerefid="Query_Where_Clause" /></if>LIMIT #{startRow},#{pageSize}</select><selectid="select$!{className}ById" resultMap="ResultMap"parameterType="$!pkSimpleType" >select<includerefid="ALL_TABLE_COLOUM" />from $!{tableName}where $!pkFiled.fieldName =#{$!pkFiled.propertyName}</select><deleteid="delete$!{className}ById" parameterType="$!pkSimpleType">delete from $!{tableName}where $!pkFiled.fieldName =#{$!pkFiled.propertyName}</delete><deleteid="delete$!{className}ByQuery" parameterType="Query$!{className}" >delete from $!{tableName}<if test="page != null" ><includerefid="Query_Where_Clause" /></if></delete><insert id="insert$!{className}"parameterType="$!{className}" >INSERT INTO$!{tableName}($!insertFields)VALUES($!insertSql)<selectKeyresultType="$!pkSimpleType"keyProperty="$!pkFiled.propertyName">SELECT @@IDENTITY AS ID</selectKey></insert><insertid="insert$!{className}Modified"parameterType="$!{className}" >insert into $!{tableName}<trim prefix="("suffix=")" suffixOverrides="," >#foreach($field in $fields)#if($!field.propertyName=='created'||$!field.propertyName=='modified')<iftest="$!field.propertyName == null" >$!{field.fieldName},</if>#else<iftest="$!field.propertyName != null" >$!{field.fieldName},</if>#end#end</trim><trim prefix="values ("suffix=")" suffixOverrides="," >#foreach($field in $fields)#if($!field.propertyName=='created'||$!field.propertyName=='modified')<iftest="$!field.propertyName == null" >now(),</if>#else<iftest="$!field.propertyName != null" >#{$!{field.propertyName}},</if>#end#end</trim><selectKeyresultType="$!pkSimpleType"keyProperty="$!pkFiled.propertyName">SELECT @@IDENTITY AS ID</selectKey></insert><select id="countByQuery"parameterType="Query$!{className}" resultType="java.lang.Long" >select count(*) from $!{tableName}<if test="page != null" ><includerefid="Query_Where_Clause" /></if></select><update id="update$!{className}ByIdModified"parameterType="$!{className}" >update $!{tableName}<set >#foreach($field in $fields)#if($!field.fieldName!=$!pkFiled.fieldName)#if($!field.propertyName=='modified')<if test="$!field.propertyName!= null" >$!field.fieldName=now(),</if>#else<iftest="$!field.propertyName != null" >$!field.fieldName =  #{$!{field.propertyName}},</if>#end#end#end</set>where $!pkFiled.fieldName =#{$!pkFiled.propertyName}</update></mapper>

以上的模板，基本上解决了实际开发的需要。由于Mybatis框架使用代理模式的特性，无需再编写对应的实现类了。不过需要注意的是，dao接口中的方法名，需要于mapper文件中的id保持一致，如果因为需要，需要更换命名规范，同步修改即可^_^

Dao层之上的代码，比如service,比如manager这类代码是需要根据业务代码来具体编写的，一些简单的封装我们还是可以做的，比如说分页这类事情。为此，我们为了返回结果的需要，需要定义一个通用点的返回类，模板如下。

结果返回模板：Result.vm


/*** Copyright(c) 2004-$!year pangzi* $!{package}.Result.java*/
package $!{package};import java.io.Serializable;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
#foreach($importin $imports)
import $import;
#end/**** @author $!author* @date $!dateTime***/
public class Result<T> extends PaginateBaseDO implements Serializable {/****/private static final longserialVersionUID = 6028636097083630372L;/*** 是否成功*/private boolean success = true;/*** service返回的对象*/private Map<String, Object>result = new HashMap<String, Object>();/*** 默认的key*/public static final StringDEFAULT_MODEL_KEY = "value";/*** 当前的key*/private String modelKey =DEFAULT_MODEL_KEY;private T module;/*** 返回码*/private String resultCode;private String[] resultCodeParams;/*** 带是否成功的构造方法** @param success*/public Result(boolean success) {this.success = success;}/*** 默认构造方法*/public Result() {}/*** 新增一个返回结果** @param obj* @return*/public Object addDefaultModel(T obj) {return module = obj;}/*** 得到默认的模型* @return*/public T getModel(){return module;}/*** 新增一个带key的返回结果** @param key* @param obj* @return*/public Object addDefaultModel(Stringkey, Object obj) {modelKey = key;return result.put(key, obj);}/*** 取出所有的key** @return*/public Set<String> keySet() {return result.keySet();}/*** 取出默认的值** @return*/public Object get() {return result.get(modelKey);}/*** 取出值** @param key* @return*/public Object get(String key) {return result.get(key);}/*** 取出值集合** @return*/public Collection values() {return result.values();}/*** 返回是否成功** @return*/public boolean getSuccess() {return success;}public boolean isSuccess() {return success;}/*** 设置返回是否成功** @param success*/public void setSuccess(boolean success){this.success = success;}public String getResultCode() {return resultCode;}public void setResultCode(StringresultCode) {this.resultCode = resultCode;}public void setResultCode(StringresultCode, String... args) {this.resultCode = resultCode;this.resultCodeParams = args;}public String[] getResultCodeParams() {return resultCodeParams;}public void setResultCodeParams(String[] resultCodeParams) {this.resultCodeParams =resultCodeParams;}
}

service层的代码，对于业务相对简单来说的系统来说，主要解决的是一个分页的问题，我们看看如下图所示。

我们可以十分方便的将MallBrand替换成我们需要的实体就可以了，于是我们可以较为快速的编写初需要的模板。

Service 模板service.vm:


/*** Copyright(c) 2004-$!year pangzi* $!{package}.$!{className}Service.java*/
package $!{package};
#foreach($importin $imports)
import $import;
#end
import java.util.Map;
import java.io.Serializable;/*** service层，组装外部接口 和 本地业务，为本业务 或者其他业务提供服务，统一返回Result* 通过Result.isSuccess判断调用是否成功* 此类中新增业务接口设计（接口命令，入参数据，返回值）要 能尽量完整的表达业务 含义* @author $!author* @date $!dateTime*/
public interface $!{className}Service {/*** 新增 $!instName* 返回result，通过result.isSuccess()判断服务调用是否成功* 通过result.getModel()得到新增$!instName* @param $!instName* @return*/public Result<$!className> add$!{className}($!className $!instName) ;/*** 按照主键id更新$!instName，请重新new$!className 的更新对象，设置要更新的字段* 返回result，通过result.isSuccess()判断更新是否成功* @param id* @param $!instName* @return*/public Result update$!{className}ById($!className $!instName);/*** 按照主键id 删除 记录* 返回result，通过result.isSuccess()判断删除是否成功* @param id* @return*/public Result delete$!{className}ById($!pkSimpleType $!{pkid});/*** 查询列表，此接口不包含分页查询* 返回result，通过result.isSuccess()判断服务调用是否成功* 通过result.getModel()得到列表信息* @param $!queryInstName* @return*/publicResult<List<$!className>> get$!{className}sByQuery(Query$!className$!queryInstName);/*** 通过主键id查询$!className* 返回result，通过result.isSuccess()判断服务调用是否成功* 通过result.getModel()得到查询的单条$!instName信息* @param id* @return*/public Result<$!className> get$!{className}ById($!pkSimpleType $!{pkid});/*** 查询列表，包含分页查询* 查询分页信息，请设置* Query$!{className}.setIndex(设置当前页数)* Query$!{className}.setPageSize(设置当前页面数据行数)* 返回result，通过result.isSuccess()判断服务调用是否成功* 通过result.getTotal()返回结果总数* 通过result.getModel()得到查询的单页列表信息* @param $!queryInstName* @return*/public Result<List<$!className>> get$!{className}sByPage(Query$!className$!queryInstName);/*** 查询总数* @param $!queryInstName* @return*/public Result<$!pkType> count(Query$!className $!queryInstName);}

Service.impl模板service.impl.vm:

#set($managerName= "$!{instName}Manager")
#set($daoName ="$!{instName}Dao")/*** Copyright(c) 2004-$!year pangzi* $!{package}.$!{className}Service.java*/
package $!{package};
#foreach($importin $imports)
import $import;
#end
import java.util.ArrayList;
#if($!{Resource})
import javax.annotation.Resource;
import org.springframework.stereotype.Component;
#end
import java.util.Map;
import java.io.Serializable;/**** @author $!author* @date $!dateTime*/
#if($!{Resource})
$!Component
#end
public class $!{className}ServiceImpl implements $!{className}Service {$!{Resource}private $!{className}Dao $!{daoName};#if(!$!{Resource})public void set$!{className}Dao($!{className}Dao $!{daoName}) {this.$!{daoName} = $!{daoName};#endpublic Result<$!className> add$!{className}($!className $!instName) {Result<$!className>result = new Result<$!className>();try {$!{daoName}.insert$!{className}Modified($!instName);result.addDefaultModel($!instName);} catch(Exception e) {result.setSuccess(false);}return result;}public Result update$!{className}ById($!className $!instName) {Result result = new Result();try {int count=$!{daoName}.update$!{className}ByIdModified($!instName);if(count>0){result.setSuccess(true);}} catch(Exception e) {result.setSuccess(false);}return result;}public Result delete$!{className}ById($!pkSimpleType $!{pkid}) {Result result = new Result();try {int count=$!{daoName}.delete$!{className}ById($!{pkid});if(count>0){result.setSuccess(true);}} catch(Exception e) {result.setSuccess(false);}return result;}       public Result<List<$!className>> get$!{className}sByQuery(Query$!className$!queryInstName) {Result<List<$!className>> result = new Result<List<$!className>>();try {result.addDefaultModel($!{daoName}.select$!{className}ByQuery($!queryInstName));} catch(Exception e) {result.setSuccess(false);}return result;  }public Result<$!className> get$!{className}ById($!pkSimpleType $!{pkid}) {Result<$!className> result = new Result<$!className>();try {          result.addDefaultModel($!{daoName}.select$!{className}ById($!{pkid}));} catch(Exception e) {result.setSuccess(false);}return result;  }public Result<List<$!className>> get$!{className}sByPage(Query$!className$!queryInstName) {Result<List<$!className>> result = new Result<List<$!className>>();$!pkSimpleType totalItem =$!{daoName}.countByQuery($!queryInstName);$!{queryInstName}.setTotalItem(totalItem);$!{queryInstName}.repaginate();if (totalItem > 0) {result.addDefaultModel($!{daoName}.select$!{className}ByPage($!queryInstName));} else {result.addDefaultModel(newArrayList<$!className>());}result.setTotalItem(totalItem);result.setPageSize($!{queryInstName}.getPageSize());result.setPage($!{queryInstName}.getPage());return result;}public Result<$!pkType> count(Query$!className $!queryInstName) {Result<$!pkType> result= new Result<$!pkType>();try { result.addDefaultModel($!{daoName}.countByQuery($!queryInstName));} catch(Exception e) {result.setSuccess(false);}return result;  }}

看起来咱们的代码生成器就要编写完成了，但是还有一点点问题，每中类别的代码生成入口在哪里？既然没有，那么就去编写一个就好了——针对每一种类别，编写一个即可，编写方式都大同小异。给你两个核心一点的就好了，剩下的自己去完善吧(至少domain dao mapper )。

package com.pz.cg.gen;import java.util.HashSet;
import java.util.Set;import com.pz.cg.CodeGenerator;
import com.pz.cg.GenerateEngine;/*** 生成一些基本类，例如queryDO,resultDO等* @author pangzi**/
public class BaseGenerator extends GenerateEngine implements CodeGenerator {public void generate(String tableName,String className) {//由PaginateBaseDO.vm生成PaginateBaseDO.javathis.classType = QUERYDOMAIN;this.setTemplate("PaginateBaseDO.vm");this.setFileName("PaginateBaseDO.java");this.setPackagee(prop.getProperty(GenerateEngine.PACKAGE_NAME)+ "." + prop.getProperty("package.querydomain"));initClassMetaInfo();intitLocation();         this.generate();//由Result.vm生成Result.javathis.classType = DOMAIN;this.setTemplate("Result.vm");this.setFileName("Result.java");this.setPackagee(prop.getProperty(GenerateEngine.PACKAGE_NAME)+ ".domain.base" );this.setImports(getResultImport());initClassMetaInfo();intitLocation();         this.generate();//生成BaseDOthis.classType = DOMAIN;this.setTemplate("BaseDO.vm");this.setFileName("BaseDO.java");this.setPackagee(prop.getProperty(GenerateEngine.PACKAGE_NAME)+ ".domain.base");this.setImports(getResultImport());initClassMetaInfo();intitLocation();         this.generate();//生成输出文件格式this.classType = DOMAIN;this.setTemplate("NoNullFieldStringStyle.vm");this.setFileName("NoNullFieldStringStyle.java");this.setPackagee(prop.getProperty(GenerateEngine.PACKAGE_NAME)+ ".domain.base" );this.setImports(getResultImport());initClassMetaInfo();intitLocation();         this.generate();                }public Set<String> getResultImport() {Set<String> imports =new HashSet<String>();imports.add(prop.getProperty(PACKAGE_NAME)+ ".domain.base"  +".PaginateBaseDO" );context.put(IMPORTS,imports);return imports;}
}

package com.pz.cg.gen;import java.util.HashSet;
import java.util.Set;import com.pz.cg.CodeGenerator;
import com.pz.cg.GenerateEngine;/*** 生成一些基本类，例如queryDO,resultDO等* @author pangzi**/
public class BaseGenerator extends GenerateEngine implements CodeGenerator {public void generate(String tableName,String className) {//由PaginateBaseDO.vm生成PaginateBaseDO.javathis.classType = QUERYDOMAIN;this.setTemplate("PaginateBaseDO.vm");this.setFileName("PaginateBaseDO.java");this.setPackagee(prop.getProperty(GenerateEngine.PACKAGE_NAME)+ "." + prop.getProperty("package.querydomain"));initClassMetaInfo();intitLocation();         this.generate();//由Result.vm生成Result.javathis.classType = DOMAIN;this.setTemplate("Result.vm");this.setFileName("Result.java");this.setPackagee(prop.getProperty(GenerateEngine.PACKAGE_NAME)+ ".domain.base" );this.setImports(getResultImport());initClassMetaInfo();intitLocation();         this.generate();//生成BaseDOthis.classType = DOMAIN;this.setTemplate("BaseDO.vm");this.setFileName("BaseDO.java");this.setPackagee(prop.getProperty(GenerateEngine.PACKAGE_NAME)+ ".domain.base");this.setImports(getResultImport());initClassMetaInfo();intitLocation();         this.generate();//生成输出文件格式this.classType = DOMAIN;this.setTemplate("NoNullFieldStringStyle.vm");this.setFileName("NoNullFieldStringStyle.java");this.setPackagee(prop.getProperty(GenerateEngine.PACKAGE_NAME)+ ".domain.base" );this.setImports(getResultImport());initClassMetaInfo();intitLocation();         this.generate();                }public Set<String>getResultImport() {Set<String> imports =new HashSet<String>();imports.add(prop.getProperty(PACKAGE_NAME)+ ".domain.base"  +".PaginateBaseDO" );context.put(IMPORTS,imports);return imports;}
}

/*** Copyright(c) 2004-2020 pangzi* com.pz.cg.gen.PojoCodeGenerator.java*/
package com.pz.cg.gen;import java.util.HashSet;
import java.util.Set;import com.pz.cg.CodeGenerator;
import com.pz.cg.GenerateEngine;public class PojoGenerator extends GenerateEngine implements CodeGenerator {public void generate(String tableName,String className) {this.tableName = tableName;this.className = className;this.setFileName(this.className+ ".java");this.setPackagee(prop.getProperty(PACKAGE_NAME)+ "." + prop.getProperty("package.domain") +this.getSecondDir());this.init(DOMAIN);context.put(IMPORTS,this.getPojoImports());this.generate();}protected Set<String>getPojoImports() {Set<String> imports =new HashSet<String>();imports.add(prop.getProperty(PACKAGE_NAME)  + ".domain.base.BaseDO");return imports;}
}

/****/
package com.pz.cg.gen;import java.util.HashSet;
import java.util.Set;import com.pz.cg.CodeGenerator;
import com.pz.cg.GenerateEngine;/*** @author pangzi**/
public class QueryPojoGenerator extends GenerateEngine implements CodeGenerator {public void generate(String tableName,String className) {this.tableName = tableName;this.className = className;this.setFileName("Query"+this.className + ".java");this.setPackagee(prop.getProperty(PACKAGE_NAME)+ "." + prop.getProperty("package.querydomain") +  this.getSecondDir());this.setImports(getImport());this.init(QUERYDOMAIN);context.put(IMPORTS,this.getImports());this.generate();}public Set<String> getImport() {Set<String> imports =new HashSet<String>();imports.add(prop.getProperty(PACKAGE_NAME)+ ".domain.base.PaginateBaseDO" );context.put(IMPORTS,imports);return imports;}
}

嗯,最后，咱们的生成器当然是使用maven的方式编写的啦，不看到最后，不想坚持的人，自然是得不到好东西的。

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion>  <groupId>com.pz</groupId>  <artifactId>pz-cg</artifactId>  <version>0.0.1-SNAPSHOT</version>  <dependencies>                   <dependency>                            <groupId>commons-beanutils</groupId>                            <artifactId>commons-beanutils</artifactId>                            <version>1.8.3</version>                   </dependency>                   <dependency>                            <groupId>commons-collections</groupId>                            <artifactId>commons-collections</artifactId>                            <version>3.2.1</version>                   </dependency>                   <dependency>                            <groupId>commons-io</groupId>                            <artifactId>commons-io</artifactId>                            <version>1.3.2</version>                   </dependency>                   <dependency>                            <groupId>commons-lang</groupId>                            <artifactId>commons-lang</artifactId>                            <version>2.5</version>                   </dependency>                   <dependency>                            <groupId>commons-logging</groupId>                            <artifactId>commons-logging</artifactId>                            <version>1.1.1</version>                   </dependency>                                                       <dependency>                            <groupId>mysql</groupId>                            <artifactId>mysql-connector-java</artifactId>                            <version>5.1.5</version>                   </dependency>                      <dependency>                            <groupId>velocity-tools</groupId>                            <artifactId>velocity-tools</artifactId>                            <version>1.2</version>                   </dependency>                   <dependency>                            <groupId>org.apache.velocity</groupId>                            <artifactId>velocity</artifactId>                            <version>1.6.3</version>                   </dependency>                   <dependency>                            <groupId>log4j</groupId>                            <artifactId>log4j</artifactId>                            <version>1.2.15</version>                             <exclusions>                                     <exclusion>                                               <groupId>javax.jms</groupId>                                               <artifactId>jms</artifactId>                                     </exclusion>                                     <exclusion>                                               <groupId>com.sun.jdmk</groupId>                                               <artifactId>jmxtools</artifactId>                                     </exclusion>                                     <exclusion>                                               <groupId>com.sun.jmx</groupId>                                               <artifactId>jmxri</artifactId>                                     </exclusion>                            </exclusions>                   </dependency>                          <dependency>                            <groupId>org.springframework</groupId>                            <artifactId>spring</artifactId>                            <version>2.5.6</version>                   </dependency>         </dependencies></project>

猿人君并没有把完整的东西放出来，因为猿人君是真心希望你认真去思考，完善一些东西，剩下的已经不多了，service的生成器并没有什么特别，只是希望你自己稍微完善下即可，如果实在想不出来，可以在blog中寻找我的联系方式。

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