textview.java

纯JAVA代码实现的银行柜员机的基本功能

package view;
import biz.*;
import com.kettas.common.*;      

import Exception.LoginException;
import Exception.RegisterException;

public class TextView {
	private IBank bank;
	private long currentId;
	public TextView(IBank bank){
		this.bank=bank;
	}
	public void showMain() throws LoginException{
		System.out.println("-------------------");
		System.out.println("1:开户");
		System.out.println("2:登录");
		System.out.println("3:退出");
		System.out.println("-------------------");
		System.out.print("请选择");
		int choice=SystemIn.readInt();   
		switch(choice){     
			case 1:{ kaihu(); break;}
			case 2:{ denglu();  break;}
			case 3:{ System.exit(0);}
			default: showMain();
		}
	}
	
	public void kaihu() throws LoginException{
		int type;
		do{
			System.out.print("请输入帐户类型(0：储蓄账号1：信用账号):");
			type=SystemIn.readInt();
		}
		while(type!=0 && type!=1);
		
		System.out.print("请输入密码:");
		String pass=SystemIn.readString();
		
		System.out.print("再一次输入密码:  ");
		String pass2=SystemIn.readString();
		
		System.out.print("请输入姓名");
		String name=SystemIn.readString();
			
		System.out.print("请输入帐户ID: ");
		String personId=SystemIn.readString();
		try {this.currentId=bank.regist(name,pass, pass2,  personId, type);
		if(this.currentId!=  -1){
			System.out.println("注册成功，您的ID是"+currentId);
			jiaoyi();
		//	showMain();
		}
	}
	    catch(Exception e){
		e.printStackTrace();
		 showMain();
	}		
	}
	public void denglu() throws LoginException{
		System.out.print("请输入帐户ID: ");
		long id=SystemIn.readInt();
		
		System.out.print("请输入密码: ");
		String pass=SystemIn.readString();	
		try {
			this.currentId=bank.login(id, pass);
		  } catch (LoginException e) {
				e.printStackTrace();
				 showMain();
			} 
			if( currentId != -1){
			    System.out.println("您是第 "+currentId+"个使用者");  
			   jiaoyi();
          }else{ 
          	     System.out.println("密码错误");
          	    
          }
	}
	
	public void jiaoyi() throws LoginException{
		System.out.println("-------------------");
		System.out.println("1: 存钱");
		System.out.println("2: 取钱 ");
		System.out.println("3: 查询余额");
		System.out.println("4: 返回到主菜单");
		System.out.println("-------------------");
		System.out.print("请选择: ");
		int choice=SystemIn.readInt();
		
		if (choice==1){
			System.out.print("请输入存钱数额: ");  
			double money=SystemIn.readDouble();			
				bank.deposit(this.currentId, money);
				jiaoyi();
		}
		else if (choice==2){
			System.out.print("请输入取钱数额: ");            
			double money=SystemIn.readDouble();
			try{
				bank.withdraw(this.currentId, money);	
				jiaoyi();
			}
			catch(Exception e){
				e.printStackTrace();
				jiaoyi();
			}
		//	bank.withdraw(this.currentId, money);
			
		}
		else if (choice==3){
			double b=bank.queryBalance(this.currentId);
			System.out.println("你帐户余额为 "+b);          
			jiaoyi();
		}
		else if (choice==4){
			showMain();
		}
		else jiaoyi();
		
	}
}