如果您的项目是 Faceted ，请右键单击该项目，然后转到属性，然后在左侧窗格中选择 Deployment Assembly 。检查依赖项是否存在于构建路径条目或 Archives （罐子）中。完成此操作后，您可以执行项目> 清洁并重新启动服务器。

If your project is Faceted, right click on the project and go to Properties, and choose Deployment Assembly on the left pane. Check if the dependencies exists there as Build Path entries or Archives (jars). Once this is done you may do Project>Clean and restart the server.