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项目忽然出现 The superclass "javax.servlet.http.HttpServlet" was not found on the Java Build Path 解决方法

项目忽然出现 The superclass "javax.servlet.http.HttpServlet" was not found on the Java Build Path 解决方法

0.环境:

  新装win8.1系统,Tomcat配置无误。

1.错误:

  项目中某一.jps页面忽然出现错误,鼠标点上去为:The superclass "javax.servlet.http.HttpServlet" was not found on the Java Build Path.

忽视错误,在Eclipse下启动tomcat的时候,报错为:Eclipse下启动tomcat报错:The archive: D:/Program Files/apache-tomcat-7.0.52/bin/bootstrap.jar which is referenced by the classpath, does not exist.

2.查找原因:

  原本我的Tomcat路径为:D:\Program Files\apache-tomcat-7.0.52\,后来由于重装系统,改为:D:\ProgramFiles\apache-tomcat-7.0.52\,在报错中可以发现是缺少servlet-api.jar,也即tomcat路径问题。

3.尝试解决:

①.  

  1.右键点击项目->build path->configure build path->add library->server runtime->apache tomcat

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