Servlet层

package com.neu.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.RequestDispatcher;
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 javax.servlet.http.HttpSession;

import com.neu.bean.User;
import com.neu.service.UserService;

/**
* 登录Servlet
*/
@WebServlet("/login")
public class LoginServlet extends HttpServlet {
private static final long serialVersionUID = 1L;

/**
* 登录验证
*/
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//代码编写处
request.setCharacterEncoding("UTF-8");
String userName=request.getParameter("userName");
String password=request.getParameter("password");
UserService service=new UserService();
User user=service.getUser(userName);
if(user!=null&&user.getPassword().equals(password)) {
request.getSession().setAttribute("user", userName);
response.sendRedirect("users");
}
else
response.sendRedirect("login.jsp");

}

}