loginservlet.java

运用jsp/servlet技术 通过bs方式 在网上购买MP3

package com.servlet;

import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.LinkedHashMap;
import java.util.Map;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import com.dto.Mp3;
import com.dto.User;
import com.sun.org.apache.commons.beanutils.BeanUtils;

public class LoginServlet extends HttpServlet {

	
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
        Map<String, Mp3> buyMp3List=new LinkedHashMap<String,Mp3>();
        HttpSession session=request.getSession();
        session.setAttribute("buyMp3List", buyMp3List);
		ServletContext sc=this.getServletContext();
		Map<String,User> userList=(Map<String,User>)sc.getAttribute("userList");
		
		User user=new User();
		try {
			BeanUtils.populate(user,request.getParameterMap());
		} catch (IllegalAccessException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (InvocationTargetException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		if(userList!=null){
		String username=user.getUsername();
		String password=user.getPassword();
		System.out.println(username);
		System.out.println(password);
		
		User tempUser=userList.get(username);
		if(tempUser!=null&&tempUser.getUsername().equals(username)&&tempUser.getPassword().equals(password)){
		     System.out.println("登陆成功");
		     session.setAttribute("isLogin", true);
		     response.sendRedirect("../jsp/Mp3List.jsp");
		}
		else{
			System.out.println("登陆失败");
			response.sendRedirect("../jsp/Login.jsp");
		}
		}
		else{
			System.out.println("用户列表为空");
		}
	}

	
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

	    doGet(request,response);
	}

}