logutil.java

老师给的在线航班系统

package com.toa.abs.util;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.DateFormat;
import java.util.Date;

public class LogUtil {
	private  File logFile;
	
	
	public LogUtil(File file){
		this.logFile=file;
	}
	
	public void printMessage(String message){
		FileOutputStream fos=null;
		PrintWriter pw=null;
		try {
			fos=new FileOutputStream(logFile,true);
			pw=new PrintWriter(fos);
			pw.println(getDateTimeString()+":"+message);
			pw.flush();
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		}finally{
			if(fos!=null)try{fos.close();}catch(IOException e){}
		}
	}
	
	public  String getDateTimeString(){
		Date date=new Date();
		DateFormat fmt=DateFormat.getDateTimeInstance(DateFormat.FULL,DateFormat.FULL);
		return fmt.format(date);
	}
	
//	public static void main(String[] args){
//		System.out.println(getDateTimeString());
//	}

}