package library;

import java.util.Scanner;

import java.io.IOException;
import java.util.Scanner;

import com.edu.dao.impl.UserDaoImpl;
import com.edu.domain.User;


public class test {



public static void main(String[] args) throws IOException {

while (true) { //缺少一个大括号，后续需要补充


Scanner sc = new Scanner(System.in);

System.out.println("+------------------------------------------------------------+");
System.out.println(" 欢迎使用图书管理系统！");
System.out.println("+------------------------------------------------------------+");
System.out.println(">>开始菜单");
System.out.println("");
System.out.println(" 1.查询图书");
System.out.println(" 2.登录系统");
System.out.println(" 3.退出系统");
System.out.println("");
System.out.println("+------------------------------------------------------------+");
System.out.println("请输入选项前的数字选择功能");

String choice = sc.nextLine();
UserDaoImpl udi = new UserDaoImpl();

//int i = 0;
//Scanner r = new Scanner(System.in);
//i=r.nextInt();

switch( choice ){
case "1" :
System.out.println(1);
break;
case "2" :

System.out.println("+------------------------------------------------------------+");
System.out.println("");
System.out.println(" 1.用户登录");
System.out.println(" 2.管理员登录");
System.out.println(" 3.退出系统");
System.out.println("");
System.out.println("+------------------------------------------------------------+");
System.out.println("请输入选项前的数字选择功能");



int u = 0;
Scanner o = new Scanner(System.in);
u=o.nextInt();

switch( u ){
case 1 :

System.out.println("");
System.out.println("登录功能未实现，默认登录成功");
System.out.println("");

System.out.println("+------------------------------------------------------------+");
System.out.println("");
System.out.println(" 1.借书");
System.out.println(" 2.还书");
System.out.println(" 3.退出系统");
System.out.println("");
System.out.println("+------------------------------------------------------------+");
System.out.println("请输入选项前的数字选择功能");

int num = 0;
Scanner man = new Scanner(System.in);
num=man.nextInt();

switch( num ){
case 1 :
break;
case 2:
huanshu s = new huanshu();

}
case 2:
System.out.println("");
System.out.println("登录功能未实现，默认登录成功");
System.out.println("");

System.out.println("+------------------------------------------------------------+");
System.out.println("");
System.out.println(" 1.添加书籍");
System.out.println(" 2.删除书籍");
System.out.println(" 3.退出系统");
System.out.println("");
System.out.println("+------------------------------------------------------------+");
System.out.println("请输入选项前的数字选择功能");


case 3:
System.exit(0);
break;




}

break;


case "3" :
System.exit(0);
break;
default :

}





}

}
}



@LeeSeoung 这是我的代码，其他的输入的包都跟我网址上给的一模一样，为了版面就不再贴了