学生管理系统之简单工具类

package com.xll.util;
import com.xll.model.*;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.util.*;



import com.xll.manage.Menu;
public class Tools {
	static Scanner input=new Scanner(System.in);	
	public static void pl(String arg){	
		System.out.println(arg);
	}
	public static void p(String arg){	
		System.out.println(arg);
	}
	public static void pl(Object arg){	
		System.out.println(arg);
	}
	
	public static String getString(String str){
		pl(str);
			return input.next();
			
	
	}
	public static int getInt(int str){
		pl(str);
		try {
			Scanner input=new Scanner(System.in);
			return input.nextInt();
			
		} catch (Exception e) {
			// TODO: handle exception
			pl("请输入合法数字");
			return 100;
		}
	}
	public static int getInt(String str){
		pl(str);
		try {
			Scanner input=new Scanner(System.in);
			return input.nextInt();
			
		} catch (Exception e) {
			// TODO: handle exception
			pl("请输入合法数字");
			return 100;	
		}
	}
	
	public static String select(String s){
		pl(s);
		String str="";
		while(true){
			String temp=input.next();
			if(temp.equalsIgnoreCase("n")||temp.equalsIgnoreCase("y")||temp.equalsIgnoreCase("是")||temp.equalsIgnoreCase("否")){
				str=temp;
				break;
			}
			else
				pl("输入错误，请重新输入");
		}		
		return str;
	}

	public static boolean isContinue(String str){
			if(select(str).equalsIgnoreCase("n"))
				return false;
			else 
				return true;
		
		
		
		
		
	}
	//菜单生成器
		public static int menuFactory(String msg){
			String[] strs=msg.split(",");
			
			StringBuffer sb=new StringBuffer();
			sb.append("--------------------------------------\n");
			for (int i=0;i