userdaoimpl.java

一个简单的银行系统

package com.bank.ata.dao.impl;

import com.bank.ata.dao.IUserDAO;
import com.bank.ata.entity.User;

public class UserDAOImpl implements IUserDAO {

	public User[] users = new User[100];
	public int i = 0;
	public int uid;

	public UserDAOImpl() {
		User user = new User();
		user.setUid("ata");
		user.setPwd("ata");
		user.setMoney(100);
		users[0] = user;
	}

	public void addMoneyKinds(String moneyKind, double hl) throws Exception {

	}

	public void addUser(User user) {
		users[i++] = user;
	}

	public void checkMony(User user, double money, String moneyKind) {
		user = users[uid];
		double hl = this.moneyKindConvert(moneyKind);
		user.setMoney(user.getMoney() - money * hl);
		users[uid] = user;
		this.showInfo(users[uid]);

	}

	// user.getUid().equals(users[n].getUid())&&user.getPwd().equals(users[n].getPwd()
	public boolean login(User user) throws Exception {
		for (int n = 0; n <= i; n++) {
			try {
				if (user.getUid().equals(users[n].getUid())
						&& user.getPwd().equals(users[n].getPwd())) {
					this.uid = n;
					this.showInfo(users[n]);
					return true;
				}
			} catch (Exception ex) {
				System.out.println("输入的用户名和密码有误,请重新登陆");
			}
		}
		System.out.println("user do not exist~!");
		return false;
	}

	public void savaMoney(User user, double money, String moneyKind)
			throws Exception {

		user = users[uid];
		// System.out.println(uid);
		// System.out.println(user.getMoney());
		double hl = this.moneyKindConvert(moneyKind);
		System.out.println(hl);
		users[uid].setMoney(users[uid].getMoney() + money * hl);
		System.out.println(users[uid].getMoney() + money * hl);
		// users[uid] = user;
		this.showInfo(users[uid]);

	}

	public void showInfo(User usr) {
		System.out.println("用户名是:" + usr.getUid());
		System.out.println("您现在帐号总额为:" + usr.getMoney());
	}

	public double moneyKindConvert(String moneyKind) {
		if (moneyKind.equals("1")) {
			return 1;
		} else if (moneyKind.equals("2")) {
			return 7;
		} else if (moneyKind.equals("3")) {
			return 13.5;
		} else if (moneyKind.equals("4")) {
			return 1 / 100.0;
		}
		return 0;
	}
}