The superclass "javax.servlet.http.HttpServlet" was not found on the Java Build Path

问题遇到的现象和发生背景

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问题相关代码，请勿粘贴截图 报错

The superclass "javax.servlet.http.HttpServlet" was not found on the Java Build Path

运行结果及报错内容

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我的解答思路和尝试过的方法
我想要达到的结果

解决方法是：项目右键->Properties->Java Build Path->Libraries->Add Library->Server Runtime。但是我的选项里面没有server runtime选项