Springboot多模块项目搭建
新建项目，作为父模块
删除除pom.xml之外的所有文件
效果如下：
.gitignore和ReadMe.md是可选文件
创建子模块
工程上右键 -> new -> model -> 选择Spring Initializer -> 下一步
依此步骤分别建立 web、service、entity、dao,删除每个模块中无用的文件，只留下pom.xml
删除除web模块外其他模块的Application启动类和resources目录下的application.properties配置文件
各个模块建立关系
父POM配置
1. packaging改为pom
2. 声明子模块
3. properties/denpendencies下的配置都为公共配置
4. build模块是打包用的，这里声明了所有模块都跳过单元测试
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.5.6</version>
<relativePath/>
</parent>
<!--父POM-->
<groupId>com.xxx</groupId>
<artifactId>myblog</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>myblog</name>
<packaging>pom</packaging>
<!--声明子模块-->
<modules>
<module>entity</module>
<module>dao</module>
<module>service</module>
<module>web</module>
</modules>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<!--maven-surefire-plugin是执行测试用例的插件，这里声明跳过TEST-->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<skip>true</skip>
</configuration>
</plugin>
</plugins>
</build>
</project>
Entity的POM配置
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<!--声明父模块-->
<parent>
<groupId>com.xxx</groupId>
<artifactId>myblog</artifactId>
<version>0.0.1-SNAPSHOT</version>
<!--默认就是 ../pom.xml-->
<relativePath>../pom.xml</relativePath>
</parent>
<!--当前模块-->
<groupId>com.xxx</groupId>
<artifactId>entity</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>entity</name>
<packaging>jar</packaging>
<dependencies>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</dependency>
</dependencies>
</project>
Dao的POM配置
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<!--声明父模块-->
<parent>
<groupId>com.xxx</groupId>
<artifactId>myblog</artifactId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../pom.xml</relativePath>
</parent>
<!--当前模块-->
<groupId>com.xxx</groupId>
<artifactId>dao</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>dao</name>
<packaging>jar</packaging>
<!--依赖-->
<dependencies>
<!--数据库连接-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<!--Mybatis-->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.2.0</version>
</dependency>
<!--引入entity模块-->
<dependency>
<groupId>com.xxx</groupId>
<artifactId>entity</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
</dependencies>
</project>
Service的POM配置
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<!--声明父模块-->
<parent>
<groupId>com.xxx</groupId>
<artifactId>myblog</artifactId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../pom.xml</relativePath>
</parent>
<!--当前模块-->
<groupId>com.xxx</groupId>
<artifactId>service</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>service</name>
<packaging>jar</packaging>
<!--依赖-->
<dependencies>
<!--引入dao模块-->
<dependency>
<groupId>com.xxx</groupId>
<artifactId>dao</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
<!--引入entity模块-->
<dependency>
<groupId>com.xxx</groupId>
<artifactId>entity</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
</dependencies>
</project>
Web的POM配置
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<!--声明父模块-->
<parent>
<groupId>com.xxx</groupId>
<artifactId>myblog</artifactId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../pom.xml</relativePath>
</parent>
<!--当前模块-->
<groupId>com.xxx</groupId>
<artifactId>web</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>web</name>
<packaging>jar</packaging>
<!--依赖-->
<dependencies>
<!--Web-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!--引入service模块-->
<dependency>
<groupId>com.xxx</groupId>
<artifactId>service</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
<!--引入entity模块-->
<dependency>
<groupId>com.xxx</groupId>
<artifactId>entity</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
</dependencies>
<!--编译打包相关-->
<build>
<plugins>
<!--SpringBoot项目必须加入这个插件，才会将普通JAR打成SpringBoot的JAR-->
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<!--指定Main Class为全局的唯一入口-->
<mainClass>com.xxx.blog.WebApplication</mainClass>
</configuration>
</plugin>
</plugins>
</build>
</project>
代码
Entity
package com.xxx.blog;
import lombok.Data;
import java.util.Date;
/**
* @author computer
*/
@Data
public class UmsMenu {
private int id;
private String title;
private int level;
private Date createTime;
private int parentId;
}
Mapper
package com.xxx.blog;
import org.apache.ibatis.annotations.Param;
import java.util.List;
/**
* @author computer
*/
public interface UmsMenuMapper {
/**
* 根据ID查找
* @param id
* @return
*/
/*@Select("select * from ums_menu where id = #{id}")
@Results({
@Result(property = "createTime",column = "create_time",javaType = Date.class),
@Result(property = "parentId",column = "parent_id",javaType = int.class)
})*/
UmsMenu findById(@Param("id") int id);
/**
* 查找所有
* @return
*/
/*@Select("select * from ums_menu")
@Results({
@Result(property = "createTime",column = "create_time",javaType = Date.class),
@Result(property = "parentId",column = "parent_id",javaType = int.class)
})*/
List<UmsMenu> findAll();
}
Mapper.xml
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.xxx.blog.UmsMenuMapper">
<resultMap id="resultMap" type="com.xxx.blog.UmsMenu">
<result column="id" property="id" javaType="java.lang.Integer"/>
<result column="title" property="title" javaType="java.lang.String"/>
<result column="level" property="level" javaType="java.lang.Integer"/>
<result column="create_time" property="createTime" javaType="java.util.Date"/>
<result column="parent_id" property="parentId" javaType="java.lang.Integer"/>
</resultMap>
<select id="findById" parameterType="java.lang.Integer" resultMap="resultMap">
select * from ums_menu where id = #{id}
</select>
<select id="findAll" resultMap="resultMap">
select * from ums_menu
</select>
</mapper>
Service
package com.xxx.blog;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
/**
* @author computer
*/
@Service
public class WebService {
@Autowired
UmsMenuMapper mapper;
/**
* 获取所有Menu信息
* @return
*/
public List<UmsMenu> getAllMenu(){
return mapper.findAll();
}
}
Controller
package com.xxx.blog.controller;
import com.xxx.blog.WebService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
/**
* @author computer
*/
@RestController
@RequestMapping("/test")
public class WebTest {
@Autowired
WebService webService;
/**
* 获取所有Menu信息
* @return
*/
@RequestMapping(value = "/getAllMenu",produces = "application/json")
public String getAllMenu(){
return webService.getAllMenu().toString();
}
}
验证
效果
注意事项
1.父pom.xml 打包方式，jar要更改为pom，build 需要更改
2.不需要打包的模块pom.xml文件中不要写<build>，全删掉，例如有些工程中的common模块，utils模块，entity模块，service模 块都不需要打包
3.声明父工程时，填写父工程位置<relativePath>../pom.xml</relativePath>
4.关于applicatin.properties配置文件，只需要在启动的模块中配置就可以了，
5.关于打包为什么打包jar包，不打war包，打war包目的是war包可以运行在tomcat下，但是SpringBoot是内置tomcat，如果你打war包，前提是干掉内置的tomcat，然后才能打包，各种麻烦，直接打包可执行jar包，使用java -jar 命令就可以完美的运行起来很方便！
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版权声明：本文为CSDN博主「凌云冷海」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/baidu_41885330/article/details/81875395
参考资料
本文来自博客园，作者：江南西道，转载请注明原文链接：https://www.cnblogs.com/jiangnanxidao/p/15585948.html
