SpringBoot项目eclipse运行正常maven install打包启动后报错ClassNotFoundException

parent的pom.xml

    <groupId>cn.licoy</groupId>
    <artifactId>parent</artifactId>
    <version>0.1</version>
    <packaging>pom</packaging>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.6.RELEASE</version>
    </parent>

    <modules>
        <module>../rest</module>
        <module>../service</module>
    </modules>

    <dependencies>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.16.16</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <mainClass>cn.licoy.rest.RestApplication</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>

</project>

直接在IDEA里面运行SpringBoot启动类是可以正常访问的，但是使用mvn install打包后，报出如下错误：

java.lang.ClassNotFoundException: cn.licoy.service.entity.User
        at java.net.URLClassLoader.findClass(Unknown Source) ~[na:1.8.0_131]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[na:1.8.0_131]
        at org.springframework.boot.loader.LaunchedURLClassLoader.loadClass(LaunchedURLClassLoader.java:94) ~[rest-0.1.jar:0.1]

其中,Springboot启动包是rest包，当中引用了service包中的User类，在打包之后的rest.jar里面lib目录下有service.jar，但是一访问就找不到类

解决方法：要给被依赖的module的pom.xml中添加

<build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <classifier>exec</classifier>
                </configuration>
            </plugin>
        </plugins>
    </build>