完整错误信息：
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Description Resource Path Location Type
The superclass "javax.servlet.http.HttpServlet" was not found on the Java Build Path add.jsp /dwz-java/WebContent/WEB-INF/jsp/management/news line 1 JSP Problem
在出现此错误的项目上单击鼠标右键》Build Path》Configure Build Path
添加tomcat服务器即可解决异常