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

  Maven異常：     maven-dependency-plugin (goals copy-dependencies unpack ) is not supported by m2e       解決辦法如下：     將<plugins>元素包裹在<pluginManagement>元素之內，如圖：    改好後，crel + s保存你的pom.xml,然後在項目上右鍵-->Maven

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