Serervlet | 慕课课程实战 | 编写登录逻辑

Users.java

package com.po;

public class Users {
    private String username;
    private String password;
    
    public Users()
    {
        
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
}

LoginServlet.java

处理post请求 + 判定用户 + 页面跳转

package com.servlet;

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;

import com.po.Users;
@WebServlet(value="/servlet/LoginServlet")
public class LoginServlet extends HttpServlet{

    /**
     * Constructor of the object.
     */
    public LoginServlet() {
        super();
    }

    /**
     * Destruction of the servlet. <br>
     */
    public void destroy() {
        super.destroy(); // Just puts "destroy" string in log
        // Put your code here
    }

    /**
     * The doGet method of the servlet. <br>
     *
     * This method is called when a form has its tag value method equals to get.
     * 
     * @param request the request send by the client to the server
     * @param response the response send by the server to the client
     * @throws ServletException if an error occurred
     * @throws IOException if an error occurred
     */
    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        doPost(request,response);
    }

    /**
     * The doPost method of the servlet. <br>
     *
     * This method is called when a form has its tag value method equals to post.
     * 
     * @param request the request send by the client to the server
     * @param response the response send by the server to the client
     * @throws ServletException if an error occurred
     * @throws IOException if an error occurred
     */
    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        Users u = new Users();
        String username = request.getParameter("username");
        String password = request.getParameter("password");
        u.setUsername(username);
        u.setPassword(password);
        
        if(u.getUsername().equals("admin")&&u.getPassword().equals("admin"))
        {
            response.sendRedirect(request.getContextPath()+"/login_success.jsp");
        }
        else
        {
            response.sendRedirect(request.getContextPath()+"/login_failure.jsp");
        }
    }

    /**
     * Initialization of the servlet. <br>
     *
     * @throws ServletException if an error occurs
     */
    public void init() throws ServletException {
        // Put your code here
    }
}