我是jsp和google app引擎的新手，但出现此错误：此URL不支持HTTP方法GET。

Question

This is my JSP File. 这是我的JSP文件。 It has 3 text fields and a submit button.. 它具有3个文本字段和一个提交按钮。

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"

"http://www.w3.org/TR/html4/loose.dtd">
<html>
  <head>
  <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
    <title>Insert title here</title>
  </head>
<body>
   <form action="buttontoserv" method="post">
    <input type="text" name="name"/><br>        
    <input type="text" name="group"/>
    <input type="text" name="pass"/>
    <input type="submit" value="submit">            
  </form>
</body>
</html>

This is my web.xml 这是我的web.xml

<?xml version="1.0" encoding="utf-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
<servlet>
    <servlet-name>ButtontoServ</servlet-name>
    <servlet-class>pack.exp.ButtontoServServlet</servlet-class>
</servlet>
<servlet-mapping>
    <servlet-name>ButtontoServ</servlet-name>
    <url-pattern>/buttontoserv</url-pattern>
</servlet-mapping>
<welcome-file-list>
    <welcome-file>index.html</welcome-file>
</welcome-file-list>
</web-app>

This is the servlet under pack.exp package with file name ButtontoServServlet.java 这是pack.exp包下的servlet，文件名为ButtontoServServlet.java

package pack.exp;
import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.*;

@SuppressWarnings("serial")
public class ButtontoServServlet extends HttpServlet 
{
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException 
    {
    String name = request.getParameter("name");
    String group = request.getParameter("group");
    String pass = request.getParameter("pass");
    System.out.println("Name :"+ name);
    System.out.println("group :"+ group);
    System.out.println("pass :"+ pass);
    }
}

When I am deploying it to the google app engineit is throwing this error "Error: HTTP method GET is not supported by this URL" 当我将其部署到Google App Engine时，它会引发此错误“错误：此URL不支持HTTP方法GET”

I also tried on tomcat and the error says "HTTPO 405 Method not allowed. The website cannot display the page HTTP 405 Most likely cause: •The website has a programming error." 我也尝试了tomcat，错误消息为“不允许使用HTTPO 405方法。该网站无法显示页面HTTP 405最有可能的原因：•该网站存在编程错误。”

Answer 1

As your servlet has only doPost method. 由于您的servlet只有doPost方法。 So, you can't get access the servlet with URL. 因此，您无法使用URL访问servlet。 Your URL should be for JSP page where action="buttontoserv" is assigned. 您的URL应该用于分配了action="buttontoserv" JSP页面。 When you click the submit button of JSP page than it will forwarded to /buttontoserv servlet. 当您单击JSP页面的/buttontoserv按钮时，它将被转发到/buttontoserv servlet。

To solve your problem, you should include a doGet method on Servlet or forward to Servlet with form submit from JSP page. 为了解决您的问题，您应该在Servlet上包含一个doGet方法，或者使用从JSP页面提交的表单将其转发到Servlet。

public class ButtontoServServlet extends HttpServlet {

    protected void processRequest(HttpServletRequest request,
        HttpServletResponse response)
            throws ServletException, IOException {
    String name = request.getParameter("name");
    String group = request.getParameter("group");
    String pass = request.getParameter("pass");
    System.out.println("Name :"+ name);
    System.out.println("group :"+ group);
    System.out.println("pass :"+ pass);

    }    
    @Override
    protected void doGet(HttpServletRequest request,
             HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    @Override
    protected void doPost(HttpServletRequest request, 
            HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }
}

Answer 2

Make sure you type the url to the jsp file instead of the servlet. 确保您将URL键入到jsp文件而不是servlet。 Also try overriding the doGet method too like: 也可以尝试覆盖doGet方法，例如：

protected void doGet (HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException 
    {
         doPost(request, response);
    }

我是jsp和google app引擎的新手，但出现此错误：此URL不支持HTTP方法GET。

问题描述

2 个解决方案

解决方案1
1 2013-12-10 09:57:23

解决方案2
0 2013-12-10 06:43:30

我是jsp和google app引擎的新手，但出现此错误：此URL不支持HTTP方法GET。

问题描述

2 个解决方案

解决方案1 1 2013-12-10 09:57:23

解决方案2 0 2013-12-10 06:43:30

解决方案1
1 2013-12-10 09:57:23

解决方案2
0 2013-12-10 06:43:30