application.java

java编写的控制台用户注册登陆小程序.

package day08.user_management;

import java.io.File;

public class Application {
	private UserDao dao;
	
	public Application(UserDao dao){
		this.dao=dao;
	}
	
	public void register(User user){
		if(dao.addUser(user)){
			System.out.println(user.getUserName()+",注册成功！");
		}else{
			System.out.println("注册失败，可能已经存在同名用户！");
		}
	}
	
	public void login(String name,String passwd){
		User user=dao.getUser(name, passwd);
		if(user==null){
			System.out.println("登录失败，请检查用户名和密码！");
		}else{
			System.out.println(user.getUserName()+",欢迎回来，您当前的积分是："+user.getScore());
		}
	}

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		UserDao dao=new UserDaoFromFile(new File("d:\\student.dat"));
		Application app=new Application(dao);
		User u1=new User("zhangsan","1234","[e-mail]",1000);
		User u2=new User("lisi","4321","[e-mail]",500);
		User u3=new User("zhangsan","8888","[e-mail]",800);
		app.register(u1);
		app.register(u2);
		app.register(u3);
		
		app.login("zhangsan", "1234");
		app.login("lisi", "4321");	
	}
}