MyEclipse 項目重新部署時出錯

錯誤：
Undeployment Failure
XXX could not be redeployed because it could not be completely removed in the undeployment phase. the most common cuase of this problem is attempting to redeploy while the server is running,which has locked one or more files.

to correct the deployment you will need to stop the server and then redeploy the project before restarting the server.


解決辦法：

把項目中引用的jar文件重新加一遍就行了，基本原因就是以前的jar文件不存在了，但是項目信息中還有，即項目的.classpath文件中還有不存在的jar文件引用。

可以右鍵點項目名稱，選擇Properties,選擇Java Build Path,選擇Libraries,把所有項目中的jar都remove，然後再點"add jars"，把項目中的jar文件都加進來，再次部署就正常了。