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

　　新項目，新建jsp頁面的時候報異常：

Multiple annotations found at this line:
    - The superclass "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 Path

　　右擊項目 -> Properties -> Java Build Path -> Libraries 選項 -> 點擊 Add Library -> Server Runtime

　　選擇tomcate -> 完成。

　　以下：

　　再看jsp 頁面已經正常了。