java我应该如何创建这个新页面？JSP还是servlet？

4 月 Questions & Answers 380

我对网络开发完全陌生，我希望能得到一些帮助。我正在使用JavaEclipseEE、tomcat服务器和mysql做一个工资系统web应用程序项目。我使用了一个教程，并设法创建了下面的登录界面。所以现在，当我点击“输入我的登录详细信息”并点击“登录”（在localhost:8080/Payroll）时，我希望它进入一个网页（我不知道如何创建），并显示一个按钮列表（我以后可以重命名的任意按钮）。谁能帮帮我吗。我不知道怎么用。JSP。html。java和我真的很困惑这些文件类型将如何帮助我获得我想要的东西。请帮助别人，我只想登录按钮重定向到一个有按钮的网页。谢谢

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.sql.*;

public class Login extends HttpServlet {

protected void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    response.setContentType("text/html;charset=UTF-8");
    PrintWriter out = response.getWriter();

    String employee_id = request.getParameter("employee_id");
    String password = request.getParameter("password");
    if(Validate.checkUser(employee_id, password)) { 
        RequestDispatcher rs = request.getRequestDispatcher("**SOME FILE NAME HERE TO REDIRECT TO?**");
        rs.forward(request, response);
    }
    else
    {
       out.println("Employee ID or Password is incorrect. Please try again.");
       RequestDispatcher rs = request.getRequestDispatcher("index.html");
       rs.include(request, response);
    }
}  


    }

索引。html

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Login</title>
</head>
<body>
<form action="login" method="post">
<h3>
Employee Login
</h3>
 <b>Employee ID:</b> <br>
 <input type="text"name="employee_id" size="20"><br><br>
<b>Password:</b><br>
<input type="password" name="password" size="20"><br><br>
<input type="submit" value="Login"><br><br>
</form>
</body>
</html>

验证。java（类文件）

import java.sql.*;
public class Validate
{
    public static boolean checkUser(String employee_id, String password)
    {
        boolean st = false;
        try { 
            Class.forName("com.mysql.jdbc.Driver").newInstance();
            Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/payroll_system", "root", ""); 
            PreparedStatement ps = con.prepareStatement("select * from employee_login where employeeID = ? and pwd = ?");
            ps.setString(1, employee_id);
            ps.setString(2, password);
            ResultSet rs =ps.executeQuery();
             st = rs.next();

         }catch(Exception e)
          {
              e.printStackTrace();
          }
             return st;                 
      }   
    }

public static boolean checkUser(String employee_id, String password) { boolean st = false; try (Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/payroll_system", "root", ""); PreparedStatement ps = con.prepareStatement("select * from employee_login where employeeID = ? and pwd = ?")) { ps.setString(1, employee_id); ps.setString(2, password); try(ResultSet rs =ps.executeQuery()) { return rs.next(); } }catch(Exception e) { e.printStackTrace(); } return false; }

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java我应该如何创建这个新页面？JSP还是servlet？

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