【HTML5入門】解決The superclass javax.servlet.http.HttpServlet was not found on the Java Build Path問題
問題：編譯其他人的程式碼或者教材書程式碼的時候經常會出現The superclass javax.servlet.http.HttpServlet was not found on the Java Build Path的問題。
問題中表示丟失HttpServlet 類，說明缺少必要包。
解決方法：右擊專案資料夾——>build path——>configure build path——>在右邊對話方塊“library”中找到 add library——>選擇“server runtime”——> 選擇已經安裝的tomcat版本，一路next。當tomcat包匯入時等待幾秒會重新整理，問題解決！
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