SpringBoot+Maven 多模块项目的构建、运行、打包

项目使用的工具:
IntelliJ IDEA
JDK 1.8

apache-maven-3.3.9
项目的目录:

主项目 springboot-multi
子模块 entity、dao、service、web
一、使用IDEA创建一个SpringBoot项目 : File -> new -> Project 项目名称为springboot-multi
二、删除项目中的src目录，把pom.xml中的项目打包方式改为pom，如下： <groupId>com.example</groupId>
<artifactId>springboot-multi</artifactId>
<version>0.0.1-SNAPSHOT</version>
<!-- 此处改为pom -->
<packaging>pom</packaging>三、创建springboot-multi项目的子模块，在项目上右键单击，选择：new -> Module。
四、创建四个子模块后，删除子模块中 src/main/java、src/main/java下的所有文件（如果没有文件跳过此操作），只保留web子模块的SpringBoot的Application主启动类。
五、主项目pom.xml (注意<modules>标签是否指定了子模块)<modelVersion>4.0.0</modelVersion>

<groupId>com.example</groupId>
<artifactId>springboot-multi</artifactId>
<version>0.0.1-SNAPSHOT</version>
<!-- 此处改为pom -->
<packaging>pom</packaging>

<name>springboot-multi</name>
<description>Demo project for Spring Boot</description>

<modules>
<module>web</module>
<module>service</module>
<module>dao</module>
<module>entity</module>
</modules>

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.10.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</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>

<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>

<!--指定使用maven打包-->
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
</configuration>
</plugin>

<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.19.1</version>
<configuration>
<skipTests>true</skipTests> <!--默认关掉单元测试 -->
</configuration>
</plugin>
</plugins>
</build>六、web子模块pom.xml（依赖service、dao、entity子模块）<modelVersion>4.0.0</modelVersion>

<groupId>com.example</groupId>
<artifactId>web</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>web</name>
<description>Demo project for Spring Boot</description>

<parent>
<groupId>com.example</groupId>
<artifactId>springboot-multi</artifactId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../pom.xml</relativePath>
</parent>

<dependencies>
<dependency>
<groupId>com.example</groupId>
<artifactId>service</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>com.example</groupId>
<artifactId>dao</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>com.example</groupId>
<artifactId>entity</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
</dependencies>

<!--spring boot打包的话需要指定一个唯一的入门-->
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<!-- 指定该Main Class为全局的唯一入口 -->
<mainClass>com.example.WebApplication</mainClass>
<layout>ZIP</layout>
</configuration>
<executions>
<execution>
<goals>
<goal>repackage</goal><!--可以把依赖的包都打包到生成的Jar包中-->
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>七、service子模块pom.xml(依赖 dao 、entity子模块)<modelVersion>4.0.0</modelVersion>

<groupId>com.example</groupId>
<artifactId>service</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>service</name>
<description>Demo project for Spring Boot</description>

<parent>
<groupId>com.example</groupId>
<artifactId>springboot-multi</artifactId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../pom.xml</relativePath>
</parent>

<dependencies>
<dependency>
<groupId>com.example</groupId>
<artifactId>dao</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>com.example</groupId>
<artifactId>entity</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
</dependencies>八、dao子模块pom.xml （依赖entity子模块） <modelVersion>4.0.0</modelVersion>

<groupId>com.example</groupId>
<artifactId>dao</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>dao</name>
<description>Demo project for Spring Boot</description>

<parent>
<groupId>com.example</groupId>
<artifactId>springboot-multi</artifactId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../pom.xml</relativePath>
</parent>

<dependencies>
<dependency>
<groupId>com.example</groupId>
<artifactId>entity</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
</dependencies>
九、entity子模块 <modelVersion>4.0.0</modelVersion>

<groupId>com.example</groupId>
<artifactId>entity</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>entity</name>
<description>Demo project for Spring Boot</description>

<paren
4000
t>
<groupId>com.example</groupId>
<artifactId>springboot-multi</artifactId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../pom.xml</relativePath>
</parent>十、pom.xml文件中需要注意的就是：

主项目的modules标签指定的子模块是否正确
子模块之间的依赖
子模块的parent标签
十一、web子模块的Application启动类:@RestController
@SpringBootApplication
public class WebApplication {

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

@RequestMapping(value = "/test",method = RequestMethod.GET)
public String test(){
return "test success";
}
}十二、执行main方法启动项目，访问localhost:8080/test，出现如下页面表示项目搭建成功：



十三、项目打包命令: mvn clean package 或者 使用右边工具栏的图形化界面打包也可以：



十四、打包成功日志：