Maven对项目拆分（idea版本）

一 创建父工程

输入项目名称和包名

删除红色框中内容

保留如下内容

修改pom.xml文件的打包方式为pom

选中父项目创建Module

这里我选择创建springboot项目

输入项目信息

选择对应的项目初始化所需要的库，也可以在之后自己再添加

下一步

复制刚刚创建的文件中的pom中的parent到父级pom.xml


修改子项目的pom.xml添加父pom的信息

父项目pom.xml中添加子项目模块

在application.properties中添加配置数据库mysql的地址

spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.url=jdbc:mysql://localhost:3306/learn?useUnicode=true&characterEncoding=utf8&allowMultiQueries=true&serverTimezone=GMT%2b8
spring.datasource.username=root
spring.datasource.password=qwerasdf123

然后就可以运行服务了，

另外我们还可以创建其他子模块


在dome-service中java目录下添加包名

创建添加各自的类

复制dome-main中的dependencies进父pom.xml中

在dome-service中创建CityService

然后在dome-main的pom.xml中添加dome-service子模块

再创建一个CityController

由于我们创建的包名不一样所以，我们要修改SpringbootApplication的扫描路径为com.daijunyi下

运行项目输入网址localhost:8080/city/test 运行成功

至此我们打包成功 附上如下各个包的pom.xml
主pom.xml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">
    <modelVersion>4.0.0</modelVersion>

    <modules>
        <module>demo-main</module>
        <module>dome-service</module>
    </modules>

    <groupId>com.daijunyi</groupId>
    <artifactId>Dome</artifactId>
    <version>1.0-SNAPSHOT</version>

    <packaging>pom</packaging>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.5.2</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.2.0</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>


</project>

demo-main的内容

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <groupId>com.daijunyi</groupId>
        <artifactId>Dome</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.daijunyi</groupId>
    <artifactId>demo-main</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>demo-main</name>
    <description>Demo project for Spring Boot</description>
    <packaging>jar</packaging>
    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <artifactId>dome-service</artifactId>
            <groupId>com.daijunyi</groupId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

demo-service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>Dome</artifactId>
        <groupId>com.daijunyi</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
    <packaging>jar</packaging>

    <artifactId>dome-service</artifactId>


</project>

最后，有时候我们也会把mybatis的xml文件写在mapper文件下所以我们要配置build，这样就可以把xml文件打包进去了

<build>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
            </resource>
        </resources>
</build>