我遇到了使页面正常工作的问题。我的表单方法设置为post，我的servlet实现了doPost()，但它一直显示我不支持POST方法。
我只是想做一个简单的网站并将值插入到我的MySQL数据库中。
*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).*
这个静态页面：
<?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>
这个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：移除了 doGet(request,response);
init()方法中打开数据库连接不是一个好主意。打开和关闭应该放在同一个try-finally块中，就像执行查询一样。 - BalusC