Request 获取根据页面获取用户输入判断登陆成功或者失败
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebServlet("/validateUser") //注意加/
public class ValidateUser extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
String[] usernames = {"小孙", "小王", "小刘"};
String[] passwords = {"000000", "111111", "222222"};
//接收客户端的表单数据
req.setCharacterEncoding("utf-8");
//用户名 和 密码
String username = req.getParameter("username");
String password = req.getParameter("password");
//判断
for (int i = 0; i < usernames.length; i++) {
if (usernames[i].equals(username)) {
//再次判断密码是否相同
if (passwords[i].equals(password)) {
//跳转到成功页面
req.getRequestDispatcher("/登陆成功.html").forward(req, resp);
return;//结束
}
}
}
req.getRequestDispatcher("/登陆失败.html").forward(req, resp);
}
}
登陆页面
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<!--<a href="/admin.html">这是爆炸信息！嘿嘿嘿</a>
<form action="/login" method="get">
<input type="text" placeholder="用户名" name="username">
<input type="password" placeholder="密码" name="password">
<input type="submit" value="登陆">
</form>-->
<form action="/day48/validateUser" method="get">
<input type="text" placeholder="用户名" name="username">
<input type="password" placeholder="密码" name="password">
<input type="submit" value="校验">
</form>
</body>
</html>
登陆成功.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h2>登陆成功</h2>
</body>
</html>
登陆失败.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h2>登陆失败</h2>
</body>
</html>
