IDEA搭建多模块项目

find_me
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1.建立父类maven项目dmk

1593846440942-8b440ca2-b3ef-45b9-adfb-42d2839bd68d

1.1父模块的pom.xm;

<?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>
 <!-- 继承说明：这里继承SpringBoot提供的父工程 --> 
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.1.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
  <!--工程说明-->
    <groupId>org.javaboy</groupId>
    <artifactId>dmk5</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>mm-web</module>
        <module>mm-service</module>
        <module>mm-mapper</module>
        <module>mm-dao</module>
    </modules>
    <!-- 版本说明：这里统一管理依赖的版本号  此处可加计不加-->
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context</artifactId>
                <version>5.2.7.RELEASE</version>
                <scope>compile</scope>
            </dependency>
            <dependency>
                <groupId>org.javaboy</groupId>
                <artifactId>mm-web</artifactId>
                <version>1.0-SNAPSHOT</version>
            </dependency>
            <dependency>
                <groupId>org.javaboy</groupId>
                <artifactId>mm-service</artifactId>
                <version>1.0-SNAPSHOT</version>
            </dependency>
            <dependency>
                <groupId>org.javaboy</groupId>
                <artifactId>mm-mapper</artifactId>
                <version>1.0-SNAPSHOT</version>
            </dependency>
            <dependency>
                <groupId>org.javaboy</groupId>
                <artifactId>mm-dao</artifactId>
                <version>1.0-SNAPSHOT</version>
            </dependency>

            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
                <version>2.3.1.RELEASE</version>
                <scope>compile</scope>
            </dependency>
               
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>5.1.42</version>
            </dependency>
        </dependencies>
    </dependencyManagement>

</project>

2.右键单击父模块建立子模块

image-20210526113059358

2.1web的pom.xml

<?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>dmk5</artifactId>
        <groupId>org.javaboy</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>mm-web</artifactId>
  <!--信息的说明也可以详细点-->
  <!--<modelVersion>4.0.0</modelVersion>-->
<!--<groupId>org.javaboy</groupId>-->
<!--<artifactId>mm-web</artifactId>-->
<!--<version>1.0-SNAPSHOT</version>-->
<!--<packaging>jar</packaging>-->
  
    <dependencies>
      <!--spring启动文件 ，如果没有此依赖会导致项目无法启动-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
      <!--spring boot启动包所需注解的依赖 @SpringBootApplication-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-autoconfigure</artifactId>
            <version>2.3.1.RELEASE</version>
        </dependency>
     <!--引入service层-->
        <dependency>
            <groupId>org.javaboy</groupId>
            <artifactId>mm-service</artifactId>
            <version>1.0-SNAPSHOT</version>
            <scope>compile</scope>
        </dependency>
				<!--连接数据库所需的包-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.20</version>
            <!--运行时才生去匹配需要什么版本的包-->
            <!--<scope>runtime</scope>-->
          <!--直接说明需要什么版本的包-->
            <!--<version>5.1.47</version>-->
        </dependency>
			<!--阿里的数据库连接池-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.10</version>
        </dependency>
      <!--测试类的依赖，测试包的坑见java爬坑-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>


</project>

2.2service的pom.xml

<?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>dmk5</artifactId>
        <groupId>org.javaboy</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>mm-service</artifactId>
    <!--信息的说明也可以详细点-->
  <!--<modelVersion>4.0.0</modelVersion>-->
	<!--<groupId>org.javaboy</groupId>-->
	<!--<artifactId>mm-service</artifactId>-->
	<!--<version>1.0-SNAPSHOT</version>-->
	<!--<packaging>jar</packaging>-->
    <dependencies>
      <!--注解所使用的包-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.2.7.RELEASE</version>
        </dependency>
      <!--引入mapper-->
        <dependency>
            <groupId>org.javaboy</groupId>
            <artifactId>mm-mapper</artifactId>
            <version>1.0-SNAPSHOT</version>
            <scope>compile</scope>
        </dependency>
    </dependencies>
</project>

2.3mapper的pom.xml

<?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>dmk5</artifactId>
        <groupId>org.javaboy</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>mm-mapper</artifactId>
    <!--信息的说明也可以详细点-->
  <!--<modelVersion>4.0.0</modelVersion>-->
	<!--<groupId>org.javaboy</groupId>-->
	<!--<artifactId>mm-mapper</artifactId>-->
	<!--<version>1.0-SNAPSHOT</version>-->
	<!--<packaging>jar</packaging>-->
    <dependencies>
      <!--mybatis和spring整合使用的包  import org.apache.ibatis.annotations.Mapper; 此处用来使用mapper注解-->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.1.1</version>
        </dependency>
      <!--spring注解所使用的包Component-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.2.7.RELEASE</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.javaboy</groupId>
            <artifactId>mm-dao</artifactId>
            <version>1.0-SNAPSHOT</version>
            <scope>compile</scope>
        </dependency>
    </dependencies>


</project>

2.4dao的pom.xml

<?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>dmk5</artifactId>
        <groupId>org.javaboy</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>mm-dao</artifactId>
    <!--信息的说明也可以详细点-->
  <!--<modelVersion>4.0.0</modelVersion>-->
	<!--<groupId>org.javaboy</groupId>-->
	<!--<artifactId>mm-dao</artifactId>-->
	<!--<version>1.0-SNAPSHOT</version>-->
	<!--<packaging>jar</packaging>-->

</project>

2.5启动类编写

在web项目下建立启动类

package org.javaboy.dmk5;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
 * @ClassName MmWebApplication
 * @Description
 * @Author find me
 * @Date 2020/7/4 0004 0:23
 * @Version 1.0
 */
@SpringBootApplication
public class MmWebApplication {

    public static void main(String[] args) {
        SpringApplication.run(MmWebApplication.class, args);
    }
}

2.6打包运行

注意，打包的时候不能直接对web项目进行打包 需要先对dkm5进行打包，然后在对web项目进行打包，否则会失败 在父项目下有的子项目在首次运行clean 和install前应该先运行父项目的clean和install

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