repackage failed: Unable to find main class

一.错误信息
SpringBoot进行Maven install操作时报repackage failed: Unable to find main class -> [Help 1]的错误,信息如下

[ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.0.4.RELEASE:repackage (default) on project qfxSpringbootReadPropertiesDemo: Execution default of goal org.springframework.boot:spring-boot-maven-plugin:2.0.4.RELEASE:repackage failed: Unable to find main class -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException

二.错误原因
因为没有正式环境的入口类,项目结构如下:

pom.xml文件的配置信息如下:

三.解决方案1
pom.xml文件的中指定入口类,代码如下

        com.qfx.App

如图

四.解决方案2
去掉配置信息中spring热部署的配置，如图

五.解决方案3
修改pom.xml配置文件内容如下,添加一个标签，代码如下

    
        test
        
            
                
                    org.springframework.boot
                    spring-boot-maven-plugin
                    
                        
                        
                            org.springframework
                            springloaded
                            1.2.8.RELEASE
                        
                    
                
            
        
    

六.再次执行 Maven install,一切正常