网上有很多解决方法，如这种

下面是具体的解决方法：
1、右击web工程-》属性或Build Path-》Java Build Path->Libraries-> Add Libray...->Server Runtime -》Tomcat Server
2、切换到Java Build Path界面中的Orader and Export，选择Tomcat。

完成之后，切记点击build project。马丹

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