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項目結(jié)構(gòu)如下：

各項目的pom.xml文件如下，

父項目

    4.0.0
    
        common
        controller
        domain
    
    com.hs
    demo
    0.0.1-SNAPSHOT
    spring-modules
    pom
    Demo project for Spring Boot
    
        1.8
        UTF-8
        2.4.2
        
        true
        true
    

    
        
            org.springframework.boot
            spring-boot-starter-test
            test
        
    

    
        
            
            
            
            
                org.springframework.boot
                spring-boot-dependencies
                2.4.4
                pom
                import
            
        
    
    
        
			
                org.springframework.boot
                spring-boot-maven-plugin
                
                    
                        
                            repackage
                        
                    
                
            
            
            
                org.apache.maven.plugins
                maven-compiler-plugin
                3.7.0
                
                    ${java.version}
                    ${java.version}
                    ${project.build.sourceEncoding}
                
            
            
            
                org.apache.maven.plugins
                maven-surefire-plugin
                2.19.1
                
                    ${maven.test.skip}
                    ${maven.test.failure.ignore}
                
            
        
    

controller子項目（主工程）

    
        demo
        com.hs
        0.0.1-SNAPSHOT
    
    4.0.0

    controller
    jar

    


        
            org.springframework.boot
            spring-boot-starter
        
        
            org.springframework.boot
            spring-boot-starter-web
        

        
            MySQL
            mysql-connector-java
        

        
            mysql
            mysql-connector-java
        

        
            com.hs
            domain
            0.0.1-SNAPSHOT
        

        
            com.hs
            common
            0.0.1-SNAPSHOT
        

    

domain子項目（model和service、repository）

    
        demo
        com.hs
        0.0.1-SNAPSHOT
    
    4.0.0

    domain

    

        
            org.springframework.boot
            spring-boot-starter-data-jpa
        

        
            com.hs
            common
            0.0.1-SNAPSHOT
        

    

common子項目（公共類項目）

    
        demo
        com.hs
        0.0.1-SNAPSHOT
    
    4.0.0

    common

下面開始測試，目前spring-boot-maven-plugin在父pom文件上，執(zhí)行后報錯找不到main class文件：Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.4.4:repackage (default) on project common: Execution default of goal org.springframework.boot:spring-boot-maven-plugin:2.4.4:repackage failed: Unable to find main class

按照提示，在父pom.xml中增加main class的配置

                org.springframework.boot
                spring-boot-maven-plugin
                
                    com.hs.demo.DemoApplication
                    ZIP
                
                
                    
                        
                            repackage
                        
                    
                
            

這會報了4個錯誤，都是報包不存在的

繼續(xù)測試，把spring-boot-maven-plugin放到主工程的pom中去

最終controller工程的pom.xml如下：

    
        demo
        com.hs
        0.0.1-SNAPSHOT
    
    4.0.0

    controller
    jar

    


        
            org.springframework.boot
            spring-boot-starter
        
        
            org.springframework.boot
            spring-boot-starter-web
        

        
            mysql
            mysql-connector-java
        

        
            mysql
            mysql-connector-java
        

        
            com.hs
            domain
            0.0.1-SNAPSHOT
        

        
            com.hs
            common
            0.0.1-SNAPSHOT
        

    

    
        
            
                org.springframework.boot
                spring-boot-maven-plugin
                
                    
                        
                            repackage
                        
                    
                
            
        
    

繼續(xù)測試，打包成功，文件大小正常

這個repackage有什么用呢？去了試試，最終變成這樣

        
            
                org.springframework.boot
                spring-boot-maven-plugin
            
        
    

同樣也打包成功，只不過主工程的jar大小有點問題，只有4kb

看看官網(wǎng)對這個的解釋：https://docs.spring.io/spring-boot/docs/2.4.4/maven-plugin/reference/htmlsingle/#repackage-example-exclude-dependency

這個其實就是把所有依賴的jar包都打進來。

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