关于eclips中tomcat发布失败的问题

出错信息：
Deployment failure on Tomcat  6.x. Could not copy all resources to D:\Workspace\Tomcat6\webapps\ROOT. If a file is locked, you can wait until the lock times out to redeploy, or stop the server and redeploy, or manually remove the deployment at D:\Workspace\Tomcat6\webapps\ROOT
解决方法：
项目-properties-java build path页头报错2 build path entries are missing.
查看是否所需lib引入正确。