错误405

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

错误提示：

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).

原因：

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);

web.config的配置

<servlet>

<servlet-name>com.panjun.servlets.HelloWorld</servlet-name>

<servlet-class>com.panjun.servlets.HelloWorld</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>com.panjun.servlets.HelloWorld</servlet-name>

<url-pattern>/HelloWorld</url-pattern>

</servlet-mapping>

package com.panjun.servlets;

import java.io.IOException;

import java.io.PrintWriter;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

public class HelloWorld extends HttpServlet {

/* (non-Javadoc)

* @see javax.servlet.http.HttpServlet#doGet(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)

*/

@Override

protected void doGet(HttpServletRequest req, HttpServletResponse resp)

throws ServletException, IOException {

// TODO Auto-generated method stub

//super.doGet(req, resp);

resp.setContentType("text/html");

PrintWriter out = resp.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>");

}

public void doPost(HttpServletRequest req, HttpServletResponse res)

throws ServletException, IOException {

doGet(req, res);

}

}

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