maven-dependency-plugin(goals copy-dependencies unpack ) is not supported by m2e

Maven异常：     maven-dependency-plugin (goals copy-dependencies unpack ) is not supported by m2e        解决办法如下：      将<plugins>元素包裹在<pluginManagement>元素之内，如图：    改好后，crel + s保存你的pom.xml,然后在项目上右键-->Maven

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