RunZeBlog项目开发流程
2024-05-18 02:28:28
今天正式开始做一个开发blog的练手项目。
第一天
今天实现项目搭建以及首页内容以及博客作者和标签的显示，前端时使用vue编写的，直接拿过来用，后台创建一个maven的父项目blog-parents，在其中添加子模块blog-api，父子项目依赖如下。
父项目依赖
<?xml version="1.0" encoding="UTF-8"?>
<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>com.runze</groupId><artifactId>blog-parents</artifactId><version>1.0-SNAPSHOT</version><modules><module>blogapi</module></modules><packaging>pom</packaging><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.5.0</version><relativePath/></parent><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding><java.version>1.8</java.version></properties><dependencyManagement></dependencyManagement><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project>
子项目依赖
<?xml version="1.0" encoding="UTF-8"?>
<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"><parent><artifactId>blog-parents</artifactId><groupId>com.runze</groupId><version>1.0-SNAPSHOT</version></parent><modelVersion>4.0.0</modelVersion><artifactId>blog-api</artifactId><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter</artifactId><!-- 排除 默认使用的logback --><exclusions><exclusion><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-logging</artifactId></exclusion></exclusions></dependency><!-- log4j2 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-log4j2</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-aop</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-mail</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-redis</artifactId></dependency><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.2.76</version></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-configuration-processor</artifactId><optional>true</optional></dependency><dependency><groupId>org.apache.commons</groupId><artifactId>commons-lang3</artifactId></dependency><dependency><groupId>commons-collections</groupId><artifactId>commons-collections</artifactId><version>3.2.2</version></dependency><dependency><groupId>com.baomidou</groupId><artifactId>mybatis-plus-boot-starter</artifactId><version>3.4.3</version></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId></dependency><!-- https://mvnrepository.com/artifact/joda-time/joda-time --><dependency><groupId>joda-time</groupId><artifactId>joda-time</artifactId><version>2.10.10</version></dependency></dependencies>
</project>
导入依赖之后创建dao、service、controller、vo、config包，
由于是前后端分离的项目，所以在config包下创建WebMVCConfig进行跨域配置，代码如下：
package com.runze.blog.config;import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;@Configuration
public class WebMVCConfig implements WebMvcConfigurer {@Overridepublic void addCorsMappings(CorsRegistry registry) {//跨域控制，前端是8080端口，后端是8888端口registry.addMapping("/**").allowedOrigins("http://localhost:8080");}
}在config包下创建MyBatisPlusConfig配置分页插件,代码如下
package com.runze.blog.config;import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;@Configuration
@MapperScan("com.runze.blog.dao.mapper")
public class MyBatisPlusConfig {//分页插件@Beanpublic MybatisPlusInterceptor mybatisPlusInterceptor(){MybatisPlusInterceptor interceptor=new MybatisPlusInterceptor();interceptor.addInnerInterceptor(new PaginationInnerInterceptor());return interceptor;}
}在vo包下创建返回对象Result
package com.runze.blog.vo;import lombok.AllArgsConstructor;
import lombok.Data;@Data
@AllArgsConstructor
public class Result {//Controller的返回值private Boolean success;private int code;private String msg;private Object data;//两个静态方法public static Result success(Object data){return new Result(true,200,"success",data);}//两个静态方法public static Result fail(int code,String msg){return new Result(false,code,msg,null);}
}vo包下创建ArticleVo,TagVo,SysUserVo，代码如下
package com.runze.blog.vo;import lombok.Data;import java.util.List;@Data
public class ArticleVo {private Long id;private String title;private String summary;private int commentCounts;private int viewCounts;private int weight;/*** 创建时间*/private String createDate;private String author;// private ArticleBodyVo body;private List<TagVo> tags;// private List<CategoryVo> categorys;}
package com.runze.blog.vo;import lombok.Data;@Data
public class TagVo {private long id;private String tagName;
}创建Controller.ArticleController
package com.runze.blog.controller;import com.runze.blog.service.ArticleService;
import com.runze.blog.vo.Result;
import com.runze.blog.vo.params.PageParams;
import com.sun.org.apache.regexp.internal.RE;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;@RestController
@RequestMapping("articles")
public class ArticleController {@Autowiredprivate ArticleService articleServiceImpl;/***@ClassName: 首页文章列表*@Param*@Author 李润泽*@Return*@Time*/@PostMappingpublic Result listArticles(@RequestBody PageParams pageParams){return articleServiceImpl.listArticles(pageParams);}
Service层代码
package com.runze.blog.service.impl;import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.runze.blog.dao.mapper.ArticleMapper;
import com.runze.blog.dao.pojo.Article;
import com.runze.blog.service.ArticleService;
import com.runze.blog.service.SysUserService;
import com.runze.blog.service.TagService;
import com.runze.blog.vo.ArticleVo;
import com.runze.blog.vo.Result;
import com.runze.blog.vo.TagVo;
import com.runze.blog.vo.params.PageParams;
import org.joda.time.DateTime;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import java.util.*;@Service
public class ArticleServiceImpl implements ArticleService {@Autowiredprivate ArticleMapper articleMapper;@Autowiredprivate TagService tagService;@Autowiredprivate SysUserService sysUserService;@Overridepublic Result listArticles(PageParams pageParams) {//1.分页查询Article数据库表Page<Article> page = new Page<>(pageParams.getPage(), pageParams.getPageSize());LambdaQueryWrapper<Article> queryWrapper = new LambdaQueryWrapper<>();//先进行置顶排序queryWrapper.orderByDesc(Article::getWeight);//再按照时间排序，倒序排列queryWrapper.orderByDesc(Article::getCreateDate);Page<Article> articlePage = articleMapper.selectPage(page, queryWrapper);List<Article> records = articlePage.getRecords();//不能将结果直接返回，需要将其转化成Vo对象List<ArticleVo> articleVoList = copyArticle(records, true, true);return Result.success(articleVoList);}private List<ArticleVo> copyArticle(List<Article> records, boolean isTag, boolean isAuthor) {List<ArticleVo> articleVoList = new ArrayList<ArticleVo>();for (Article record : records) {articleVoList.add(copy(record, isTag, isAuthor));}return articleVoList;}@Overridepublic Result hotArticle(int limit) {LambdaQueryWrapper<Article> queryWrapper = new LambdaQueryWrapper<>();//根据浏览量排序queryWrapper.orderByDesc(Article::getViewCounts);//查询id与titlequeryWrapper.select(Article::getId,Article::getTitle);//在sql语句的后来加上查询的数量queryWrapper.last("limit "+limit);List<Article> articles = articleMapper.selectList(queryWrapper);return Result.success(copyArticle(articles,false,false));}private ArticleVo copy(Article article, boolean isTag, boolean isAuthor) {ArticleVo articleVo = new ArticleVo();//Spring自带的属性复制工具，将名称一样类型一样的属性复制BeanUtils.copyProperties(article, articleVo);//creatTime类型不一致，手动进行转换articleVo.setCreateDate(new DateTime(article.getCreateDate()).toString("yyyy-MM-dd HH:mm"));Long articleId = article.getId();//并不是所有的博客都需要标签与作者，在添加之前需要进行一些判断if (isTag) {articleVo.setTags(tagService.findTagsByArticleId(articleId));}Long authorId = article.getAuthorId();if (isAuthor) {articleVo.setAuthor(sysUserService.findSysUserByAuthorId(authorId).getNickname());}return articleVo;}
}
pojo类代码
package com.runze.blog.dao.pojo;import lombok.Data;@Data
public class Article {public static final int Article_TOP = 1;public static final int Article_Common = 0;private Long id;private String title;private String summary;private int commentCounts;private int viewCounts;/*** 作者id*/private Long authorId;/*** 内容id*/private Long bodyId;/***类别id*/private Long categoryId;/*** 置顶*/private int weight = Article_Common;/*** 创建时间*/private Long createDate;}package com.runze.blog.dao.pojo;
import lombok.Data;@Data
public class SysUser {private Long id;private String account;private Integer admin;private String avatar;private Long createDate;private Integer deleted;private String email;private Long lastLogin;private String mobilePhoneNumber;private String nickname;private String password;private String salt;private String status;
}package com.runze.blog.dao.pojo;import lombok.Data;@Data
public class Tag {private Long id;private String avatar;private String tagName;}
根据文章id获取作者以及文章标签，多表查询，其mapper文件如下
<?xml version="1.0" encoding="UTF-8" ?>
<!--MyBatis配置文件-->
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"><mapper namespace="com.runze.blog.dao.mapper.SysUserMapper"><select id="findSysUserByArticleId" parameterType="long" resultType="com.runze.blog.dao.pojo.SysUser">SELECT</select>
</mapper>
<?xml version="1.0" encoding="UTF-8" ?>
<!--MyBatis配置文件-->
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"><mapper namespace="com.runze.blog.dao.mapper.TagMapper"><select id="findTagsByArticleId" parameterType="long" resultType="com.runze.blog.dao.pojo.Tag">SELECT id,avatar,tag_name as tagNamefrom ms_tagWHERE id IN(SELECT tag_id from ms_article_tag WHERE article_id=#{articleId})</select>
第二天查询最热标签
查询最热标签需要进行多表查询，首先获取article表的最多文章的前几个标签的tag_id,再根据标签id获取tabName即可，
controller层的代码
package com.runze.blog.controller;import com.runze.blog.service.TagService;
import com.runze.blog.vo.Result;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;@RestController
@RequestMapping("tags")
public class TagController {@Autowiredprivate TagService tagService;@GetMapping("hot")public Result hot(){//创建最热标签的数量int limit=3;return tagService.hot(limit);}
}service层代码如下
@Overridepublic Result hot(int limit) {//标签拥有的文化数量最多称为最热标签List<Long> tagIds=tagMapper.findHotsTags(limit);//得到ids之后查询tag,先进行判断是否为空,如果为空，返回一个空列表if(CollectionUtils.isEmpty(tagIds)){return Result.success(Collections.emptyList());}List<Tag> tagList=tagMapper.findTagByIds(tagIds);return Result.success(tagList);}mapper.xml如下
<select id="findHotsTags" parameterType="int" resultType="java.lang.Long">SELECT tag_id FROM ms_article_tag GROUP BY tag_id ORDER BY COUNT(*) DESC LIMIT #{limit}</select><select id="findTagByIds" parameterType="list" resultType="com.runze.blog.dao.pojo.Tag">select id,tag_name as tagName from ms_tagwhere id in<foreach collection="tagIds" item="tagId" separator="," open="(" close=")">#{tagId}</foreach></select></mapper>第三天
- 查询最热文章
@PostMapping("hot")public Result hot(){int limit=5;return articleServiceImpl.hotArticle(limit);}
@PostMapping("hot")public Result hot(){int limit=5;return articleServiceImpl.hotArticle(limit);}
@Overridepublic Result hotArticle(int limit) {LambdaQueryWrapper<Article> queryWrapper = new LambdaQueryWrapper<>();//根据浏览量排序queryWrapper.orderByDesc(Article::getViewCounts);//查询id与titlequeryWrapper.select(Article::getId,Article::getTitle);//在sql语句的后来加上查询的数量queryWrapper.last("limit "+limit);List<Article> articles = articleMapper.selectList(queryWrapper);return Result.success(copyArticle(articles,false,false));}
- 最新文章与最热文章类似，不做赘述
- 文章归档
@PostMapping("listArchives")public Result listArchives(){return articleServiceImpl.listArchives();}
@Overridepublic Result listArchives() {List<Archives> archives=articleMapper.listArchives();return Result.success(archives);}<mapper namespace="com.runze.blog.dao.mapper.ArticleMapper"><select id="listArchives" resultType="com.runze.blog.dao.dos.Archives">SELECT year(FROM_UNIXTIME(create_date/1000)) as year,month(FROM_UNIXTIME(create_date/1000)) as month,COUNT(*) as account from ms_articlegroup by year,month</select>
</mapper>
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