【JAVA WEB应用开发】5-2转发和重定向

却尘 · 发表于 2023-3-31 10:17:22

转发和重定向

l 转发：forward

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>

<html>

<head>

<title>菜鸟教程(runoob.com)</title>

</head>

<body>

用户名：<input type="text" name="name">

<br />

密码：<input type="text" name="pwd" />

</form>

</body>

</html>

转发：forward（ForwordServlet.java）

//导入必需的 java 库

import java.io.IOException;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

@WebServlet("/ForwordServlet")

//扩展 HttpServlet 类

public class ForwordServlet extends HttpServlet {

// 处理 GET 方法请求的方法

public void doGet(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException{

}

// 处理 POST 方法请求的方法

protected void doPost(HttpServletRequest req, HttpServletResponse resp)

throws ServletException, IOException { // 处理POST请求

req.setCharacterEncoding("UTF-8");

// String name = req.getParameter("name");

// String pwd = req.getParameter("pwd");

req.getRequestDispatcher("success.jsp").forward(req, resp); // 跳转

}

转发：forward（success.jsp）

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>

<html>

<head>

<title>菜鸟教程(runoob.com)</title>

</head>

<body>

登录成功

</body>

</html>

l 重定向：redirect

重定向：redirect（PageRedirect.java）

import java.io.IOException;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

@WebServlet("/PageRedirect")

public class PageRedirect extends HttpServlet{

public void doGet(HttpServletRequest request,

HttpServletResponse response)

throws ServletException, IOException

{

// 设置响应内容类型

response.setContentType("text/html;charset=UTF-8");

// 要重定向的新位置

String site = new String("login.jsp");

response.setStatus(response.SC_MOVED_TEMPORARILY);

response.setHeader("Location", site);

}

		自动登录	找回密码
密码			立即注册