这是在使用maven打包方式启动springboot项目时出现的异常, 
我的异常原因属于下面的情况: 
此时maven指令行为:mvn spring-boot:run. 
如果写成这样会导致最终的maven指令为:mvn mvn spring-boot:run. 
所以需要注意修改为:spring-boot:run即可.

还有一种可能,Maven插件[Run As]-[Maven build]时并未为其指定goal或phase 
解决方法：

在pom.xml中找到

<build>

节点，

在里面加上

<defaultGoal>compile</defaultGoal>

即可

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