An internal error occurred during: "Redeploy".

错误详情：

An internal error occurred during: "Redeploy".
Container with path org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/Java JDK VM 1.7.0_u45 Windows could not be found in project xxxxxxx

解决方法：

选择项目->右键->properties->java Build Path>Libraries ->查看下面JRE System Library 是不是有红色的提示? 有的话，选择它。删除。在右边 Add Libraty 重新添加一个就好了。