[英]HTTP Status 405 - HTTP method POST is not supported by this URL java servlet
我無法讓頁面工作。 我有我的表單方法發布，我的servlet實現了doPost() 。 但是，它一直向我顯示我不支持POST方法。
我只是想做一個簡單的網站，並將值插入我的MySQL數據庫。
*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).*
靜態頁面：
<?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中：
<?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>
編輯：刪除doGet（請求，響應）;
這是因為你調用doGet()沒有實際執行doGet() 這是doGet（）的默認實現，它會拋出錯誤，說明該方法不受支持。
如果您使用的是tomcat，可以嘗試一下
<servlet-mapping>
<http-method>POST</http-method>
</servlet-mapping>
除了<servlet-name>和<url-mapping>
它說“不支持POST”，因此請求不會調用您的servlet。 如果我是你，我將發出一個GET（例如使用瀏覽器訪問）到你發出POST請求的確切URL，看看你得到了什么。 我打賭你會看到意想不到的東西。
這件事發生在我身上：
而form方法=“POST”
我嘗試直接使用URL訪問操作，而不使用表單提交。 由於URL的默認方法是doGet方法，因此當您不使用表單提交時，您將看到@ your console的http 405錯誤。
解決方案：僅使用映射到servlet操作的表單按鈕。
如果您在使用doPost()替換doGet() doPost()並更改form method="post"后仍然遇到問題。 嘗試清除瀏覽器的緩存或在其他瀏覽器或隱身/私密模式下點擊URL。 它可能有效！
有關最佳做法，請點擊此鏈接。 https://www.oracle.com/technetwork/articles/javase/servlets-jsp-140445.html
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