1、定义一个登录的html页面，定义一个form表单
html代码
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<h2>请输入以下内容</h2>
<form action="RegisterDemo" method="get">
账号:<input type="text" name="username"/><br>
密码:<input type="password" name="password"/><br>
<input type="submit" value="登录"/>
</form>
</body>
</html>
2、定义一个Servlet，名为RegisterDemo
package com.itheima.servlet;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@SuppressWarnings("serial")
public class RegisterDemo extends HttpServlet{
/**
* 1.request：包含请求信息
* 2.response：响应数据给浏览器，就靠这个对象
*/
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
}
3、针对登录成功或者失败进行判断，然后跳转到另一个网页
/**
* 1.request：包含请求信息
* 2.response：响应数据给浏览器，就靠这个对象
*/
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//1.获取数据
String username = request.getParameter("username");
String password = request.getParameter("password");
System.out.println("username = " + username);
System.out.println("password = " + password);
//2.校验数据
//向客户端输出内容
PrintWriter pw = response.getWriter();
if ("admin".equals(username) && "123".equals(password)) {
//System.out.println("登录成功！");
//pw.write("login success!");
//成功跳转到login_success页面
//设置状态码,重新定位状态码
response.setStatus(302);
//定位跳转的是哪一个页面
response.setHeader("Location", "login_success.html");
}else {
//System.out.println("登录失败！");
pw.write("login failed..");
}
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
登录成功的html代码
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
登录成功啦！
<a href="">获取网站登录成功总数</a>
</body>
</html>
正在尝试写博客，把会的分享给你们，如有写的不好的地方，希望指点一下，喜欢的朋友们请点个赞，谢谢！