fileinout.java

ATM的实现,简单的操作具体应用于界面将其出来

package com.gaoying.util;

import java.io.EOFException;
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.util.ArrayList;

import com.gaoying.comm.Filename;
import com.gaoying.model.Account;
import com.gaoying.model.MyObjecOutputStream;

public class FileInOut implements Filename {

	//得到新建用户的账号
	public static String getAccNum(){
		String num=null;
		FileInputStream fin=null;
		ObjectInputStream objin=null;
		try {
			fin=new FileInputStream(SYS_FILE);
			objin=new ObjectInputStream(fin);
			num=(String)objin.readObject();
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally{
			try {
				objin.close();
				fin.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}	
		}
		long  n=Long.parseLong(num)+1;
		FileOutputStream fout=null;
		ObjectOutputStream  objout=null;
		try {
			fout=new FileOutputStream(SYS_FILE);
			objout=new ObjectOutputStream(fout);
			objout.writeObject(n+"");
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally{
			try {
				objout.close();
				fout.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		return num;
	}
	//建立用户
	public static void createAcc(Account acc){
		ObjectOutputStream objout=null;
		FileOutputStream fout=null;
		try {
			fout=new FileOutputStream(ACC_FILE,true);
			if(Filename.ACC_FILE.exists()&&Filename.ACC_FILE.length()>0){
			objout=new MyObjecOutputStream(fout);
			}else{
				objout=new ObjectOutputStream(fout);
			}
			objout.writeObject(acc);
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally{
				try {
					objout.close();
					fout.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
		}
		System.out.println("成功建立对象");
	}
	//后台读取所有用户
	public static Account[] readAllAcc(){
		ObjectInputStream objin=null;
		FileInputStream fin=null;
		ArrayList list=new ArrayList();
		try {
			fin=new FileInputStream(ACC_FILE);
			objin=new ObjectInputStream(fin);
			while(true){
			  Account acc=(Account)objin.readObject();
			  list.add(acc);
			  }
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}  catch (EOFException e) {
			
			
		}catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally{
			try {
				objin.close();
				fin.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		Account acc[]=new Account[list.size()];
		for(int i=0;i<acc.length;i++){
			acc[i]=(Account)list.get(i);
		}
		return acc;
	}
	//保存所有帐户
	public static void saveAllACC(Account[] acc){
		ObjectOutputStream objout=null;
		FileOutputStream fout=null;
		try {
			fout=new FileOutputStream(ACC_FILE);
			objout=new ObjectOutputStream(fout);
			for(int i=0;i<acc.length;i++){
				objout.writeObject(acc[i]);
			}
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally{
			try {
				objout.close();
				fout.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		System.out.println("保存成功");
	}
}