在寫helloapp時login.html能打開，但提交后報404.。。。。。。求解決。。。。。。
初學者，原理不懂。。。。。。
uj5u.com熱心網友回復：
D:\apache-tomcat-8.5.61\webapps\Java\helloapp\login.html<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Hello App</title>
</head>
<body>
<form name="loginForm" method="POST" action="dispatcher">
<table>
<tr>
<td><div align="left">User Name:</div></td>
<td><input type="text" name="username"></td>
</tr>
<tr>
<td><div align="left">Password:</div></td>
<td><input type="password" name="password"></td>
</tr>
<tr>
<td><input type="submit" name="submit" value="https://bbs.csdn.net/topics/submit"></td>
<td><input type="reset" name="reset" value="https://bbs.csdn.net/topics/reset"></td>
</tr>
</table>
</form>
</body>
</html>
uj5u.com熱心網友回復：
D:\apache-tomcat-8.5.61\webapps\Java\helloapp\hello.jsp
<%@ 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>Hello App</title>
</head>
<body>
<b>Hello: <%= request.getAttribute("USER") %></b>
</body>
</html>
uj5u.com熱心網友回復：
?D:\apache-tomcat-8.5.61\webapps\Java\helloapp\src\mypack\DisparcherServlet.javapackage mypack;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
public class DisparcherServlet extends GenericServlet {
private String target = "/hello.jsp";
@Override
public void service(ServletRequest request, ServletResponse response) throws ServletException, IOException {
//讀取用戶名
String username = request.getParameter("username");
//讀取密碼
String password = request.getParameter("password");
//在request物件中添加USER屬性
request.setAttribute("USER", username);
//在request物件中添加PASSWORD屬性
request.setAttribute("PASSWORD", password);
//把請求發送給hello.jsp
ServletContext context = getServletContext();
RequestDispatcher dispatcher = context.getRequestDispatcher(target);
dispatcher.forward(request, response);
}
}
uj5u.com熱心網友回復：
你還真是初學者，怎么說呢。登錄就會使收參的servlet你有沒有設定標注，或者在web.xml設定在類的上邊添加@WebServlet("/login")
在你的jsp表單form里的action里寫上“你的專案名字/login”
uj5u.com熱心網友回復：
要看看你的web.xml里面的配置吧轉載請註明出處，本文鏈接：https://www.uj5u.com/houduan/238148.html
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