An internal error occurred during: "Redeploy"和Exploded location overlaps an existing deployment

An internal error occurred during: "Redeploy".
org/maven/ide/eclipse/embedder/ProjectUpdater 解决办法
将plugins文件件把org.maven开头的文件删除掉即可。

Exploded location overlaps an existing deployment解决办法
项目->properties->MyEclipse->Web->Web Context-root的名字为重命名之后的名字即可