The type javax.servlet.http.HttpServletRequest cannot be resolved. 解決辦法

報錯信息: The type javax.servlet.http.HttpServletRequest cannot be resolved. It is indirectly referenced from required .class files 原因是缺少serverlet的引用庫,解決辦法: 1.右鍵工程 -properties->java build path->在java bu
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