eclipse引入web項目報錯

eclipse上的tomcat版本爲8.5 引入項目tomcat版本爲7.5 引入項目後工作區報錯，打開報錯文件，報錯信息爲：Multiple annotations found at this line:     - The superclass "javax.servlet.http.HttpServlet" was not found on the Java      Build Path

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