HTTP状态405-此URL Java Servlet不支持HTTP方法POST

阮昊阳

2023-03-14

问题内容：

我无法使页面正常工作。我有要发布的form方法和servlet实现doPost()。但是，它不断向我显示我不支持 POST 方法。

我只是想做一个简单的网站，并将值插入到我的MySQL DB中。

*type Status report
message HTTP method POST is not supported by this URL
description The specified HTTP method is not allowed for the requested resource (HTTP method POST is not supported by this URL).*

静态页面：

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//WAPFORUM//DTD XHTML Mobile 1.0//EN"
        "http://www.wapforum.org/DTD/xhtml-mobile10.dtd" >

<html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <title>XHTML Mobile Profile Document</title>
        <!-- 
            Change href="style.css" below to the file name and
            relative path or URL of your external style sheet.
          --> 
        <link rel="stylesheet" href="index.css" type="text/css"/>
        <!-- 
        <style> document-wide styles would go here </style>
        -->
    </head>
    <body>

        <h1> Register Here </h1>
       <form action="regSuccess.do" method = "POST">
         UserName: <input type="text" name="txtregUsername" size="15" maxlength="15">
                   <br/>
         Password: <input type="password" name="txtregPassword" size="15" 
                    maxlength="15"><br/>
         Name: <input type="text" name="txtregName" size="20" maxlength="30"><br/>
         Email: <input type="text" name="txtregEmail" size="20" maxlength="30">
                <br/><br/> 
               <input type="submit" name="btnRegister" value="Register Me"/>
        </form>
    </body>
</html>

Servlet：

package core;

import java.io.*;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.*;
import javax.servlet.http.*;
import java.sql.*;

public class handlingReg extends HttpServlet {

    //database parameters
    private static final String db_server = "localhost/";
    private static final String db_name ="bus_guide";
    private Connection con = null;

    //init of connection to dabatase
    public void init(ServletConfig config) throws ServletException {
    try {
        Class.forName("com.mysql.jdbc.Driver").newInstance();
        }
    catch (Exception e) {
        System.out.println("Exception in init(): unable to load JDBC DriverA");
        }
    try {
    con = DriverManager.getConnection("jdbc:mysql://"+ db_server + db_name , "root" , "");
        System.out.println("conn: "+con);
        }
    catch (Exception e) {
        System.out.println(e.getMessage());
        }
    }
    //end init()

    public void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
       //response handling

       response.setContentType("text/html");
       PrintWriter out = response.getWriter();

       //handling request
       String enteredUsername = request.getParameter("txtregUsername");
       String enteredPw = request.getParameter("txtregPassword");
       String enteredName = request.getParameter("txtregName");
       String enteredEmail = request.getParameter("txtregEmail");

        //inserting values into database
        try {
            Statement stmnt = con.createStatement();
            stmnt.executeUpdate("INSERT INTO regUsers VALUES('"+enteredUsername+"','"+enteredPw+"','"+enteredName+"','"+enteredEmail+"')");
        } catch (SQLException ex) {
            System.out.println(ex.getMessage());
        }

       //output html out.println("");
       out.println("<?xml version = \"1.0\" encoding =\"utf-8\"?>");
       out.println("<!DOCTYPE html PUBLIC \"-//WAPFORUM/DTD XHTML Mobile 1.0//EN\"");
       out.println("    \"http://www.wapforum.org/DTD/xhtml-mobile10.dtd\">");
       out.println("<html xmlns=\"http://www.w3.org/1000/xhtml\">");

       out.println("<head>");
       out.println("<title></title>");
       out.println("</head>");
       out.println("<body>");
       out.println("Register Success!");
       out.println("<a href = \"index.xhtml\"> Click here to go back to main page. 
                    </a>");
       out.println("</body>");
       out.println("</html>");
    }

}

web.xml：

<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
    version="2.4">

 <!--Self declared servlet mapping starts here-->
 <servlet>
  <servlet-name>handleRegister</servlet-name>
  <servlet-class>core.handlingReg</servlet-class>
 </servlet>

 <servlet-mapping>
  <servlet-name>handleRegister</servlet-name>
  <url-pattern>/regSuccess.do</url-pattern>
 </servlet-mapping>

 <!--Self declared servlet mapping ends here-->  
 <servlet-mapping>
  <servlet-name>invoker</servlet-name>
  <url-pattern>/servlet/*</url-pattern>
 </servlet-mapping>
 <mime-mapping>
  <extension>xhtml</extension>
  <mime-type>text/html</mime-type>
 </mime-mapping>
 <mime-mapping>
  <extension>jad</extension>
  <mime-type>text/vnd.sun.j2me.app-descriptor</mime-type>
 </mime-mapping>
 <mime-mapping>
  <extension>jar</extension>
  <mime-type>application/java-archive</mime-type>
 </mime-mapping>
</web-app>

编辑：删除doGet（request，response）;

问题答案：

这是因为您在打电话时doGet()并未实际实现doGet()。这是doGet（）的默认实现，会引发错误，指出该方法不受支持。

HTTP状态405-此URL Java Servlet不支持HTTP方法POST

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