Servlet eroor：HTTP method GET is not supported by this URL

今天想复习一下servlet，采用Myeclipse新建了一个TestServlet类继承httpservlet，代码如下：

package edu.hubu.cst.testServlet;

import java.io.IOException;
import java.io.OutputStream;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class TestServlet extends HttpServlet {
 
 public TestServlet(){
  System.out.println("第一步：实例化");
 }

 protected void doGet(HttpServletRequest req, HttpServletResponse resp)
   throws ServletException, IOException {
//  super.doGet(req, resp);-------屏蔽此处即可
  System.out.println("第三步：doGet请求");
  System.out.println(req.getRequestURL());
//  req.getRequestDispatcher("success.jsp").forward(req, resp);
  resp.sendRedirect("success.jsp");
 }

 protected void doPost(HttpServletRequest req, HttpServletResponse resp)
   throws ServletException, IOException {
//  super.doPost(req, resp);------屏蔽此处即可
  System.out.println("第三步：doPost请求");
 }

 public void destroy() {
  super.destroy();
  System.out.println("第四步：销毁");
 }

 public void init() throws ServletException {
  super.init();
  System.out.println("第二步：初始化");
 }

 
}

访问时，一直报错：

type: Status report

message: HTTP method GET is not supported by this URL

description: The specified HTTP method is not allowed for the requested resource (HTTP

method GET is not supported by this URL).

经过上网查询，原因如下：

1，继承自HttpServlet的Servlet没有重写对于请求和响应的处理方法：doGet或doPost等方法；默认调

用父类的doGet或doPost等方法；

2，父类HttpServlet的doGet或doPost等方法覆盖了你重写的doGet或doPost等方法；

不管是1或2，父类HttpServlet的doGet或doPost等方法的默认实现是返回状态代码为405的HTTP错误表示

对于指定资源的请求方法不被允许。

解决方法：

1，子类重写doGet或doPost等方法；

 2，在你扩展的Servlert中重写doGet或doPost等方法来处理请求和响应时 不要调用父类HttpServlet的

doGet或doPost等方法，即去掉super.doGet(request, response)和super.doPost(request, response);

 

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