搭建SSM环境整合通用Mapper和PageHelper

新建Maven工程

填写项目的Maven坐标

创建父工程依赖 ssm-parent

修改ssm-parent 的 pom.xml

<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/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>my.ssm.parent</groupId><artifactId>ssm-parent</artifactId><version>0.0.1-SNAPSHOT</version><packaging>pom</packaging><!-- 集中定义依赖版本号 --><properties><junit.version>4.10</junit.version><spring.version>4.1.3.RELEASE</spring.version><mybatis.version>3.2.8</mybatis.version><mybatis.spring.version>1.2.2</mybatis.spring.version><mybatis.paginator.version>1.2.15</mybatis.paginator.version><mysql.version>5.1.32</mysql.version><slf4j.version>1.6.4</slf4j.version><jackson.version>2.4.2</jackson.version><druid.version>1.0.9</druid.version><httpclient.version>4.3.5</httpclient.version><jstl.version>1.2</jstl.version><servlet-api.version>2.5</servlet-api.version><jsp-api.version>2.0</jsp-api.version><joda-time.version>2.5</joda-time.version><commons-lang3.version>3.3.2</commons-lang3.version><commons-io.version>1.3.2</commons-io.version></properties><!-- 依赖管理，依赖该工程的子工程可以自己选择进行依赖 --><dependencyManagement><dependencies><!-- 单元测试 --><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>${junit.version}</version><scope>test</scope></dependency><!-- Spring --><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-beans</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-aspects</artifactId><version>${spring.version}</version></dependency><!-- Mybatis --><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>${mybatis.version}</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>${mybatis.spring.version}</version></dependency><!-- 分页助手 --><dependency><groupId>com.github.pagehelper</groupId><artifactId>pagehelper</artifactId><version>3.7.5</version></dependency><dependency><groupId>com.github.jsqlparser</groupId><artifactId>jsqlparser</artifactId><version>0.9.1</version></dependency><!-- 通用Mapper --><dependency><groupId>com.github.abel533</groupId><artifactId>mapper</artifactId><version>2.3.4</version></dependency><!-- MySql --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>${mysql.version}</version></dependency><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-log4j12</artifactId><version>${slf4j.version}</version></dependency><!-- Jackson Json处理工具包 --><dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId><version>${jackson.version}</version></dependency><!-- 连接池 --><dependency><groupId>com.jolbox</groupId><artifactId>bonecp-spring</artifactId><version>0.8.0.RELEASE</version></dependency><!-- httpclient --><dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpclient</artifactId><version>${httpclient.version}</version></dependency><!-- JSP相关 --><dependency><groupId>jstl</groupId><artifactId>jstl</artifactId><version>${jstl.version}</version></dependency><dependency><groupId>javax.servlet</groupId><artifactId>servlet-api</artifactId><version>${servlet-api.version}</version><scope>provided</scope></dependency><dependency><groupId>javax.servlet</groupId><artifactId>jsp-api</artifactId><version>${jsp-api.version}</version><scope>provided</scope></dependency><!-- 时间操作组件 --><dependency><groupId>joda-time</groupId><artifactId>joda-time</artifactId><version>${joda-time.version}</version></dependency><!-- Apache工具组件 --><dependency><groupId>org.apache.commons</groupId><artifactId>commons-lang3</artifactId><version>${commons-lang3.version}</version></dependency><dependency><groupId>org.apache.commons</groupId><artifactId>commons-io</artifactId><version>${commons-io.version}</version></dependency></dependencies></dependencyManagement><build><finalName>${project.artifactId}</finalName><plugins><!-- 资源文件拷贝插件 --><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-resources-plugin</artifactId><version>2.7</version><configuration><encoding>UTF-8</encoding></configuration></plugin><!-- java编译插件 --><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId><version>3.2</version><configuration><source>1.8</source><target>1.8</target><encoding>UTF-8</encoding></configuration></plugin></plugins><pluginManagement><plugins><!-- 配置Tomcat插件 --><plugin><groupId>org.apache.tomcat.maven</groupId><artifactId>tomcat7-maven-plugin</artifactId><version>2.2</version></plugin></plugins></pluginManagement></build>
</project>

继承parent

继承parent之后，ssm项目可能会出现小红叉，解决方法如下：

继承parent之后可以发现，编译的jdk版本从1.5变为1.8：

默认创建的jdk版本为1.5，然而在ssm-parent中设置了编译的jdk版本。

子工程使用依赖

Parent中的依赖管理

修改ssm项目中的pom.xml

<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/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>my.ssm</groupId><artifactId>ssm</artifactId><version>0.0.1-SNAPSHOT</version><packaging>war</packaging><parent><groupId>my.ssm.parent</groupId><artifactId>ssm-parent</artifactId><version>0.0.1-SNAPSHOT</version></parent><dependencies><!-- 单元测试 --><dependency><groupId>junit</groupId><artifactId>junit</artifactId><scope>test</scope></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-aspects</artifactId></dependency><!-- Mybatis --><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId></dependency><!-- MySql --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId></dependency><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-log4j12</artifactId></dependency><!-- Jackson Json处理工具包 --><dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId></dependency><!-- 连接池 --><dependency><groupId>com.jolbox</groupId><artifactId>bonecp-spring</artifactId></dependency><!-- JSP相关 --><dependency><groupId>jstl</groupId><artifactId>jstl</artifactId></dependency><dependency><groupId>javax.servlet</groupId><artifactId>servlet-api</artifactId><scope>provided</scope></dependency><dependency><groupId>javax.servlet</groupId><artifactId>jsp-api</artifactId><scope>provided</scope></dependency><!-- Apache工具组件 --><dependency><groupId>org.apache.commons</groupId><artifactId>commons-lang3</artifactId></dependency><dependency><groupId>org.apache.commons</groupId><artifactId>commons-io</artifactId></dependency><dependency><groupId>com.github.pagehelper</groupId><artifactId>pagehelper</artifactId></dependency><dependency><groupId>com.github.jsqlparser</groupId><artifactId>jsqlparser</artifactId></dependency><dependency><groupId>com.github.abel533</groupId><artifactId>mapper</artifactId></dependency></dependencies><build><plugins><!-- 配置Tomcat插件 --><plugin><groupId>org.apache.tomcat.maven</groupId><artifactId>tomcat7-maven-plugin</artifactId><configuration><port>80</port><!-- http://127.0.0.1:{port}/{path} --><path>/</path></configuration></plugin></plugins></build>
</project>

运行tomcat插件

运行发现：

解决方法：需要把ssm-parent安装到本地仓库。

再次运行ssm项目，错误已经不在了。

配置Web.xml

在ssm工程中的webapp下面创建WEB-INF

然后在创建web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5"><display-name>ssm</display-name><context-param><!--指定spring的配置文件所在位置 --><param-name>contextConfigLocation</param-name><param-value>classpath:spring/applicationContext*.xml</param-value></context-param><!--Spring的ApplicationContext 载入 --><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><!-- 编码过滤器，以UTF8编码 --><!-- 只能解决POST的请求乱码，不能解决GET请求 --><filter><filter-name>encodingFilter</filter-name><filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class><init-param><param-name>encoding</param-name><param-value>UTF8</param-value></init-param></filter><filter-mapping><filter-name>encodingFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping><!-- 解决PUT请求无法提交表单数据的问题 --><filter><filter-name>HttpMethodFilter</filter-name><filter-class>org.springframework.web.filter.HttpPutFormContentFilter</filter-class></filter><filter-mapping><filter-name>HttpMethodFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping><!-- 将POST请求转化为DELETE或者是PUT要用_method指定真正的请求方法--><filter><filter-name>HiddenHttpMethodFilter</filter-name><filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class></filter><filter-mapping><filter-name>HiddenHttpMethodFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping><!-- 配置SpringMVC框架入口 --><servlet><servlet-name>my-ssm</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><init-param><param-name>contextConfigLocation</param-name><!-- spring mvc的配置文件 --><param-value>classpath:spring/ssm-servlet.xml</param-value></init-param><load-on-startup>1</load-on-startup><!-- 1表示容器启动的时候就初始化这个servlet，0表示第一次访问的时候初始化这个servlet --></servlet><servlet-mapping><servlet-name>ssm</servlet-name><!-- 可行：/、*.xxx、/xxx/*不行：/*--><url-pattern>/rest/*</url-pattern></servlet-mapping><welcome-file-list><welcome-file>index.jsp</welcome-file></welcome-file-list></web-app>

配置数据库文件 Jdbc.properties

数据库表我们已经准备好了。

配置jdbc.properties文件：

Spring容器配置文件

接下来我们根据在web.xml配置的<param-value>classpath:spring/applicationContext*.xml</param-value>路径下创建spring的配置文件。

<beans xmlns="http://www.springframework.org/schema/beans"xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsdhttp://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd"><!-- 使用spring自带的占位符替换功能 --><bean
        class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"><!-- 允许JVM参数覆盖 --><!-- java -Djdbc.url=123 -jar xxx.jar --><property name="systemPropertiesModeName" value="SYSTEM_PROPERTIES_MODE_OVERRIDE" /><!-- 忽略没有找到的资源文件 --><property name="ignoreResourceNotFound" value="true" /><!-- 配置资源文件 --><property name="locations"><list><value>classpath:jdbc.properties</value></list></property></bean><!-- 扫描包 --><context:component-scan base-package="my.ssm"/><!-- 定义数据源 --><bean id="dataSource" class="com.jolbox.bonecp.BoneCPDataSource"destroy-method="close"><!-- 数据库驱动 --><property name="driverClass" value="${jdbc.driverClassName}" /><!-- 相应驱动的jdbcUrl --><property name="jdbcUrl" value="${jdbc.url}" /><!-- 数据库的用户名 --><property name="username" value="${jdbc.username}" /><!-- 数据库的密码 --><property name="password" value="${jdbc.password}" /><!-- 检查数据库连接池中空闲连接的间隔时间，单位是分，默认值：240，如果要取消则设置为0 --><property name="idleConnectionTestPeriod" value="60" /><!-- 连接池中未使用的链接最大存活时间，单位是分，默认值：60，如果要永远存活设置为0 --><property name="idleMaxAge" value="30" /><!-- 每个分区最大的连接数 --><!-- 判断依据：请求并发数--><property name="maxConnectionsPerPartition" value="100" /><!-- 每个分区最小的连接数 --><property name="minConnectionsPerPartition" value="5" /></bean></beans>

Spring事务

<beans xmlns="http://www.springframework.org/schema/beans"xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsdhttp://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd"><!-- 定义事务管理器 --><bean id="transactionManager"class="org.springframework.jdbc.datasource.DataSourceTransactionManager"><property name="dataSource" ref="dataSource" /></bean><!-- 定义事务策略 --><tx:advice id="txAdvice" transaction-manager="transactionManager"><tx:attributes><!--所有以query开头的方法都是只读的 --><tx:method name="query*" read-only="true" /><!--其他方法使用默认事务策略 --><tx:method name="*" /></tx:attributes></tx:advice><aop:config><!--pointcut元素定义一个切入点，execution中的第一个星号 用以匹配方法的返回类型，这里星号表明匹配所有返回类型。 com.abc.dao.*.*(..)表明匹配cn.itcast.mybatis.service包下的所有类的所有 方法 --><aop:pointcut id="myPointcut" expression="execution(* my.ssm.service.*.*(..))" /><!--将定义好的事务处理策略应用到上述的切入点 --><aop:advisor advice-ref="txAdvice" pointcut-ref="myPointcut" /></aop:config></beans>

SpringMVC配置文件

根据web.xml配置的<param-value>classpath:spring/ssm-servlet.xml</param-value>路径下我们来创建spring mvc的配置文件。

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"xmlns:context="http://www.springframework.org/schema/context"xmlns:mvc="http://www.springframework.org/schema/mvc"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsdhttp://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd"><!-- 注解驱动 --><mvc:annotation-driven/><!-- 扫描Controller --><context:component-scan base-package="my.ssm.controller"/><!-- 视图解析器 --><!-- Example: prefix="/WEB-INF/jsp/", suffix=".jsp", viewname="test" -> "/WEB-INF/jsp/test.jsp" --><bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="prefix" value="/WEB-INF/views/"/><property name="suffix" value=".jsp"/></bean></beans>

Mybatis和Spring的整合

<beans xmlns="http://www.springframework.org/schema/beans"xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsdhttp://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd"><bean class="org.mybatis.spring.SqlSessionFactoryBean"><!-- 数据源 --><property name="dataSource" ref="dataSource"/><!-- 配置Mybatis的全局配置文件 --><property name="configLocation" value="classpath:mybatis/mybatis-config.xml"/><!-- 配置mapper.xml文件 --><!-- <property name="mapperLocations" value="classpath:mybatis/mappers/*.xml"/> --><!-- 别名包 --><property name="typeAliasesPackage" value="my.ssm.pojo"/></bean><!-- mapper接口的扫描器 --><bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"><property name="basePackage" value="my.ssm.mapper"/></bean></beans>

注意：配置mapper.xml文件暂时注释掉，因为现在我们还没有配置mapper.xml，这样启动会报错。

Mybatis的全局配置文件

配置通用mapper和pagehelper：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configurationPUBLIC "-//mybatis.org//DTD Config 3.0//EN""http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration><plugins><!-- 分页助手 --><plugin interceptor="com.github.pagehelper.PageHelper"><property name="dialect" value="mysql" /><!-- 该参数默认为false --><!-- 设置为true时，使用RowBounds分页会进行count查询 --><property name="rowBoundsWithCount" value="true" /></plugin><!-- 通用mapper --><plugin interceptor="com.github.abel533.mapperhelper.MapperInterceptor"><!--主键自增回写方法,默认值MYSQL,详细说明请看文档 --><property name="IDENTITY" value="MYSQL" /><!--通用Mapper接口，多个通用接口用逗号隔开 --><property name="mappers" value="com.github.abel533.mapper.Mapper" /></plugin></plugins></configuration>

导入jsp页面

通用页面跳转

package my.ssm.controller;import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;/*** 通用的页面跳转逻辑* @author c**/
@RequestMapping("page")
@Controller
public class PageController {@RequestMapping(value = "{pageName}", method = RequestMethod.GET)public String toPage(@PathVariable("pageName") String pageName){return pageName;}
}

测试发现报错了：

我们看来详细的错误信息：

严重: A child container failed during start
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost].StandardContext[]]at java.util.concurrent.FutureTask.report(Unknown Source)at java.util.concurrent.FutureTask.get(Unknown Source)at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123)at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:800)at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)at java.util.concurrent.FutureTask.run(Unknown Source)at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)at java.lang.Thread.run(Unknown Source)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost].StandardContext[]]at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)... 6 more
Caused by: java.lang.IllegalArgumentException: Servlet mapping specifies an unknown servlet name ssmat org.apache.catalina.core.StandardContext.addServletMapping(StandardContext.java:3241)at org.apache.catalina.core.StandardContext.addServletMapping(StandardContext.java:3220)at org.apache.catalina.deploy.WebXml.configureContext(WebXml.java:1367)at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1346)at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:878)at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:376)at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5322)at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)... 6 more四月 29, 2018 11:01:09 下午 org.apache.catalina.core.ContainerBase startInternal
严重: A child container failed during start
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost]]at java.util.concurrent.FutureTask.report(Unknown Source)at java.util.concurrent.FutureTask.get(Unknown Source)at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123)at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:302)at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443)at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:732)at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)at org.apache.catalina.startup.Tomcat.start(Tomcat.java:341)at org.apache.tomcat.maven.plugin.tomcat7.run.AbstractRunMojo.startContainer(AbstractRunMojo.java:1238)at org.apache.tomcat.maven.plugin.tomcat7.run.AbstractRunMojo.execute(AbstractRunMojo.java:592)at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:132)at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:120)at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:355)at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:155)at org.apache.maven.cli.MavenCli.execute(MavenCli.java:584)at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:216)at org.apache.maven.cli.MavenCli.main(MavenCli.java:160)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)at java.lang.reflect.Method.invoke(Unknown Source)at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost]]at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)at java.util.concurrent.FutureTask.run(Unknown Source)at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)at java.lang.Thread.run(Unknown Source)
Caused by: org.apache.catalina.LifecycleException: A child container failed during startat org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1131)at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:800)at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)... 6 more

我们来定位到错误的地方：

重新修改之后：

现在我们加入log4j日志再来测试：

log4j.rootLogger=DEBUG,A1
log4j.logger.com.taotao = DEBUG
log4j.logger.org.mybatis = DEBUGlog4j.appender.A1=org.apache.log4j.ConsoleAppender
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss,SSS} [%t] [%c]-[%p] %m%n

我们再次测试运行：

配置通用Mapper

配置通用Mapper的插件

User实体添加JPA注解

package my.ssm.pojo;import java.util.Date;import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;@Table(name = "tb_user")
public class User {@Id@GeneratedValue(strategy = GenerationType.IDENTITY)private Long id;// 用户名private String userName;// 密码private String password;// 姓名private String name;// 年龄private Integer age;// 性别，1男性，2女性private Integer sex;// 出生日期private Date birthday;// 创建时间private Date created;// 更新时间private Date updated;public Long getId() {return id;}public void setId(Long id) {this.id = id;}public String getuserName() {return userName;}public void setuserName(String userName) {this.userName = userName;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}public String getName() {return name;}public void setName(String name) {this.name = name;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}public Integer getSex() {return sex;}public void setSex(Integer sex) {this.sex = sex;}public Date getBirthday() {return birthday;}public void setBirthday(Date birthday) {this.birthday = birthday;}public Date getCreated() {return created;}public void setCreated(Date created) {this.created = created;}public Date getUpdated() {return updated;}public void setUpdated(Date updated) {this.updated = updated;}@Overridepublic String toString() {return "User [id=" + id + ", userName=" + userName + ", password=" + password + ", name=" + name+ ", age=" + age + ", sex=" + sex + ", birthday=" + birthday + ", created=" + created+ ", updated=" + updated + "]";}}

创建UserMapper接口

EasyUI的datagrid的数据结构

封装EasyUIResult

package my.ssm.bean;import java.util.List;public class EasyUIResult {private Long total;private List<?> rows;public EasyUIResult() {}public EasyUIResult(Long total, List<?> rows) {this.total = total;this.rows = rows;}public Long getTotal() {return total;}public void setTotal(Long total) {this.total = total;}public List<?> getRows() {return rows;}public void setRows(List<?> rows) {this.rows = rows;}}

实现用户列表的查询

Controller实现

package my.ssm.controller;import my.ssm.bean.EasyUIResult;
import my.ssm.service.UserService;import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;@Controller
@RequestMapping("user")
public class UserController {@Autowiredprivate UserService userService;/*** 查询用户列表* * @param page* @param rows* @return*/@RequestMapping(value = "list", method = RequestMethod.GET)@ResponseBodypublic EasyUIResult queryUserList(@RequestParam("page") Integer page, @RequestParam("rows") Integer rows) {EasyUIResult easyUIResult = this.userService.queryUserList(page, rows);return easyUIResult;}}

Service实现

配置分页助手：

使用分页助手：

package my.ssm.service;import java.util.List;import my.ssm.bean.EasyUIResult;
import my.ssm.mapper.UserMapper;
import my.ssm.pojo.User;import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;import com.github.abel533.entity.Example;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;@Service
public class UserService {@Autowiredprivate UserMapper userMapper;public EasyUIResult queryUserList(Integer page, Integer rows) {// 设置分页参数PageHelper.startPage(page, rows);// 查询User数据Example example = new Example(User.class);example.setOrderByClause("updated DESC"); // 设置排序条件List<User> users = this.userMapper.selectByExample(example);// 获取分页后的信息PageInfo<User> pageInfo = new PageInfo<User>(users);return new EasyUIResult(pageInfo.getTotal(), pageInfo.getList());}}

最终测试