“javax.servlet.http.HttpServlet” was not found on the Java Build Path

The superclass “javax.servlet.http.HttpServlet” was not found on the Java Build Pathjava 在WEB-INF目录下建立index.jsp 代码出现错误 一、在出现此错误的项目上单击鼠标右键–>Build Path–>Configure Build Path… 二、java Build Path–>Librarie
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