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
     }
 }