建立了一个Javaweb工程，并在eclipse中配置了Web容器Tomcat。新建的jsp页面，添加一个简单的Java类。可是，JSP页面顶端出现“红色”的报错信息：The superclass "javax.servlet.http.HttpServlet" was not found on the Java Build Path。原来Javaweb工程类中没有添加Tomcat运行时相关类导致。解决方法是点击自己所建的Web工程，选择build path，点击configure build path，然后找到 Libraries，选择 add Library 。选择myeclipse server library 。选择自己的tomcat服务器。点添加即可。
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