Servlet基礎範例 doGet&doPost

servlet java

airswalker 2016-10-18 23:31:03 ‧ 2219 瀏覽

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各位先進前輩們大家好
以下是一個基礎範例
我的疑問是為什麼程式碼中的goGet可以順利執行，但改成doPost後在執行時會跳出錯誤訊息405，HelloWorld不是已經繼承了HttpServlet類別的doGet()跟doPost()方法嗎?

// Import required java libraries
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

// Extend HttpServlet class
public class HelloWorld extends HttpServlet {
   public void doGet(HttpServletRequest req,
                    HttpServletResponse res)
            throws ServletException, IOException
  {
      // Set response content type
      res.setContentType("text/html");

      // Actual logic goes here.
      PrintWriter out = res.getWriter();
      out.println("<HTML>");
      out.println("<HEAD><TITLE>Hello World</TITLE></HEAD>");
      out.println("<BODY>");
      out.println("<BIG>Hello World!</BIG>");
      out.println("</BODY></HTML>");
  }
}