1.index.jsp代码：
<%--
Created by IntelliJ IDEA.
User: Administrator
Date: 2023-01-15
Time: 11:43
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>
登录
</title>
</head>
<body>
<div style="text-align: center">
<%--这里表单表示的意思，以post方式提交表单，提交到我们的login请求--%>
<%--${pageContext.request.contextPath}代表当前项目--%>
<form action="${pageContext.request.contextPath}/login" method="post">
用户名：<input type="text" name="username"><br>
密码：<input type="password" name="password"><br>
爱好：
<input type="checkbox" name="hobby">女孩</input>
<input type="checkbox" name="hobby">代码</input>
<input type="checkbox" name="hobby">唱歌</input>
<input type="checkbox" name="hobby">电影</input>
<br>
<input type="submit">
</form>
</div>
</body>
</html>
2.成功提示页面success.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <body> <h2>成功!</h2> </body> </html>
3.代码LoginServlet.jsp
package com.yin;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
public class LoginServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
String username=req.getParameter("username");
String password=req.getParameter("password");
String [] hobbies=req.getParameterValues("hobby");
//req.getParameter("hobby");
System.out.println("============================");
System.out.println(username+":"+password);
System.out.println("============================");
//通过请求转发，/代表当前的web应用
req.getRequestDispatcher("/success.jsp").forward(req,resp);
//req.getRequestDispatcher(req.getContextPath()+"/success.jsp").forward(req,resp);
resp.setCharacterEncoding("utf-8");
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
doGet(req, resp);
}
}
4.web.xml代码：
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0"
metadata-complete="true">
<servlet>
<servlet-name>req</servlet-name>
<servlet-class>com.yin.LoginServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>req</servlet-name>
<url-pattern>/login</url-pattern>
</servlet-mapping>
</web-app>
标签：resp,req,request,jsp,应用,转发,import,servlet,javax From： https://www.cnblogs.com/insoon/p/17053370.html