基于SpringBoot 2.3.7.RELEASE的Maven多模块示例极简教程
在搞懂Maven多模块应用开发前，建议阅读以下 该博客，夯实一下基础，其实也就是规范的问题，每个Maven项目标签的使用方式及含义。搞清楚后，对后面的项目创建就轻松很多。笔者已经将整个项目建了Git仓库，点击此处访问 项目。
一、在初始化器上创建SpringBoot全局工程
1.1 阿里初始化器
1.2 填写配置清单
1.3 选择版本
1.4 填写工程名
此时看一下整个项目的目录：
1.5 裁剪项目文件
删除选中的文件
二、创建两个Maven子模块
2.1 创建demo-web模块
2.2 导入Spring Web依赖
在子模块的pom文件里添加如下依赖：
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
2.3 整个pom文件内容
<?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>demo</artifactId>
<groupId>com.example</groupId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>demo-web</artifactId>
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
</project>
Maven会自动将子模块添加到主pom文件中。
2.4 创建demo-common模块
同demo-web子模块的创建一样，该模块用于提供通用工具类。
2.5 创建demo-common模块
三、子模块间的联系
3.1 web模块依赖common模块
在web模块的pom文件中引入common模块依赖：
<dependency>
<groupId>com.example</groupId>
<artifactId>demo-common</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
3.2 Maven打包结果
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Build Order:
[INFO]
[INFO] demo [pom]
[INFO] demo-common [jar]
[INFO] demo-web [jar]
[INFO]
[INFO] --------------------------< com.example:demo >--------------------------
[INFO] Building demo 0.0.1-SNAPSHOT [1/3]
[INFO] --------------------------------[ pom ]---------------------------------
[INFO]
[INFO] --- spring-boot-maven-plugin:2.3.7.RELEASE:repackage (repackage) @ demo ---
[INFO]
[INFO] --- maven-install-plugin:2.4:install (default-install) @ demo ---
[INFO] Installing F:\respository\MultiModulesApp\pom.xml to E:\respository\com\example\demo\0.0.1-SNAPSHOT\demo-0.0.1-SNAPSHOT.pom
[INFO]
[INFO] ----------------------< com.example:demo-common >-----------------------
[INFO] Building demo-common 0.0.1-SNAPSHOT [2/3]
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ demo-common ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 0 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile) @ demo-common ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 1 source file to F:\respository\MultiModulesApp\demo-common\target\classes
[INFO]
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ demo-common ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory F:\respository\MultiModulesApp\demo-common\src\test\resources
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:testCompile (default-testCompile) @ demo-common ---
[INFO] Changes detected - recompiling the module!
[INFO]
[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ demo-common ---
[INFO]
[INFO] --- maven-jar-plugin:2.4:jar (default-jar) @ demo-common ---
[INFO] Building jar: F:\respository\MultiModulesApp\demo-common\target\demo-common-0.0.1-SNAPSHOT.jar
[INFO]
[INFO] --- spring-boot-maven-plugin:2.3.7.RELEASE:repackage (repackage) @ demo-common ---
[INFO] Attaching repackaged archive F:\respository\MultiModulesApp\demo-common\target\demo-common-0.0.1-SNAPSHOT-EXEC.jar with classifier EXEC
[INFO]
[INFO] --- maven-install-plugin:2.4:install (default-install) @ demo-common ---
[INFO] Installing F:\respository\MultiModulesApp\demo-common\target\demo-common-0.0.1-SNAPSHOT.jar to E:\respository\com\example\demo-common\0.0.1-SNAPSHOT\demo-common-0.0.1-SNAPSHOT.jar
[INFO] Installing F:\respository\MultiModulesApp\demo-common\pom.xml to E:\respository\com\example\demo-common\0.0.1-SNAPSHOT\demo-common-0.0.1-SNAPSHOT.pom
[INFO] Installing F:\respository\MultiModulesApp\demo-common\target\demo-common-0.0.1-SNAPSHOT-EXEC.jar to E:\respository\com\example\demo-common\0.0.1-SNAPSHOT\demo-common-0.0.1-SNAPSHOT-EXEC.jar
[INFO]
[INFO] ------------------------< com.example:demo-web >------------------------
[INFO] Building demo-web 0.0.1-SNAPSHOT [3/3]
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ demo-web ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 0 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile) @ demo-web ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 2 source files to F:\respository\MultiModulesApp\demo-web\target\classes
[INFO]
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ demo-web ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory F:\respository\MultiModulesApp\demo-web\src\test\resources
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:testCompile (default-testCompile) @ demo-web ---
[INFO] Changes detected - recompiling the module!
[INFO]
[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ demo-web ---
[INFO]
[INFO] --- maven-jar-plugin:2.4:jar (default-jar) @ demo-web ---
[INFO] Building jar: F:\respository\MultiModulesApp\demo-web\target\demo-web-0.0.1-SNAPSHOT.jar
[INFO]
[INFO] --- spring-boot-maven-plugin:2.3.7.RELEASE:repackage (repackage) @ demo-web ---
[INFO] Replacing main artifact with repackaged archive
[INFO]
[INFO] --- maven-install-plugin:2.4:install (default-install) @ demo-web ---
[INFO] Installing F:\respository\MultiModulesApp\demo-web\target\demo-web-0.0.1-SNAPSHOT.jar to E:\respository\com\example\demo-web\0.0.1-SNAPSHOT\demo-web-0.0.1-SNAPSHOT.jar
[INFO] Installing F:\respository\MultiModulesApp\demo-web\pom.xml to E:\respository\com\example\demo-web\0.0.1-SNAPSHOT\demo-web-0.0.1-SNAPSHOT.pom
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary for demo 0.0.1-SNAPSHOT:
[INFO]
[INFO] demo ............................................... SUCCESS [ 1.084 s]
[INFO] demo-common ........................................ SUCCESS [ 1.587 s]
[INFO] demo-web ........................................... SUCCESS [ 1.289 s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 4.299 s
[INFO] Finished at: 2021-10-20T14:33:44+08:00
[INFO] ------------------------------------------------------------------------