【Maven】009-Maven 简单父子工程搭建

一、需求说明

1、结构

父工程为学校，子工程（模块）有两个：通用模块、教师模块。

2、第三方库

lombok：每个子工程都需要，直接在父工程引入依赖；

hutool：在父工程管理依赖版本。

二、工程搭建

1、父工程

第一步：创建父工程

第二步：引入公共依赖 lombok 和管理 hutool 依赖版本

<?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.zibo</groupId><artifactId>school</artifactId><version>1.0-SNAPSHOT</version><properties><maven.compiler.source>17</maven.compiler.source><maven.compiler.target>17</maven.compiler.target><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding></properties><!-- 公共依赖 --><dependencies><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>1.18.30</version></dependency></dependencies><!-- 依赖版本管理 --><dependencyManagement><dependencies><dependency><groupId>cn.hutool</groupId><artifactId>hutool-all</artifactId><version>5.8.24</version></dependency></dependencies></dependencyManagement>
</project>

2、公共子模块

第一步：创建子模块

IDEA 中选择将 school 作为父工程后会自动修改 pom.xml 文件！

父工程的 pom.xml 文件

<?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.zibo</groupId><artifactId>school</artifactId><version>1.0-SNAPSHOT</version><packaging>pom</packaging><modules><module>common</module></modules><properties><maven.compiler.source>17</maven.compiler.source><maven.compiler.target>17</maven.compiler.target><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding></properties><!-- 公共依赖 --><dependencies><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>1.18.30</version></dependency></dependencies><!-- 依赖版本管理 --><dependencyManagement><dependencies><dependency><groupId>cn.hutool</groupId><artifactId>hutool-all</artifactId><version>5.8.24</version></dependency></dependencies></dependencyManagement>
</project>

子工程的 pom.xml 文件：

<?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><parent><groupId>com.zibo</groupId><artifactId>school</artifactId><version>1.0-SNAPSHOT</version></parent><artifactId>common</artifactId><properties><maven.compiler.source>17</maven.compiler.source><maven.compiler.target>17</maven.compiler.target><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding></properties></project>

第二步：公共子模块引入 hutool 依赖

在 pom.xml 中

<!-- 引入 hutool -->
<dependencies><dependency><groupId>cn.hutool</groupId><artifactId>hutool-all</artifactId></dependency>
</dependencies>

第三步：写一个简单的工具类

package com.zibo;import cn.hutool.core.util.StrUtil;public class MyStringUtils {public static boolean isBlank(String str){return StrUtil.isBlank(str);}}

3、教师子模块

第一步：创建子模块，并引入公共子模块

<?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><parent><groupId>com.zibo</groupId><artifactId>school</artifactId><version>1.0-SNAPSHOT</version></parent><artifactId>teacher</artifactId><properties><maven.compiler.source>17</maven.compiler.source><maven.compiler.target>17</maven.compiler.target><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding></properties><dependencies><!-- 引入公共子模块的依赖 --><dependency><groupId>com.zibo</groupId><artifactId>common</artifactId><version>1.0-SNAPSHOT</version></dependency></dependencies></project>

第二步：使用公共子模块内的工具类

package com.zibo;
public class Main {public static void main(String[] args) {// 使用自定义的字符串工具类System.out.println(MyStringUtils.isBlank(" "));}
}

三、最终的 Maven 父子工程

1、pom.xml 文件

父工程

<?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.zibo</groupId><artifactId>school</artifactId><version>1.0-SNAPSHOT</version><packaging>pom</packaging><modules><module>common</module><module>teacher</module></modules><properties><maven.compiler.source>17</maven.compiler.source><maven.compiler.target>17</maven.compiler.target><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding></properties><!-- 公共依赖 --><dependencies><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>1.18.30</version></dependency></dependencies><!-- 依赖版本管理 --><dependencyManagement><dependencies><dependency><groupId>cn.hutool</groupId><artifactId>hutool-all</artifactId><version>5.8.24</version></dependency></dependencies></dependencyManagement>
</project>

公共子模块

<?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><parent><groupId>com.zibo</groupId><artifactId>school</artifactId><version>1.0-SNAPSHOT</version></parent><artifactId>common</artifactId><properties><maven.compiler.source>17</maven.compiler.source><maven.compiler.target>17</maven.compiler.target><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding></properties><!-- 引入 hutool --><dependencies><dependency><groupId>cn.hutool</groupId><artifactId>hutool-all</artifactId></dependency></dependencies></project>

教师模块

<?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><parent><groupId>com.zibo</groupId><artifactId>school</artifactId><version>1.0-SNAPSHOT</version></parent><artifactId>teacher</artifactId><properties><maven.compiler.source>17</maven.compiler.source><maven.compiler.target>17</maven.compiler.target><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding></properties><dependencies><!-- 引入公共子模块的依赖 --><dependency><groupId>com.zibo</groupId><artifactId>common</artifactId><version>1.0-SNAPSHOT</version></dependency></dependencies></project>

2、整体结构