利用流的知识实现一个简陋的控制台日志功能

import java.io.*;
import java.util.*;

public class SimpleLog{
    
    public static void main(String[] args){
        
        try{
            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
            PrintWriter pw = new PrintWriter(new FileWriter("D:/Java/SimpleLog/Log.txt",true));
            String str = null;
            
            while(!(str = br.readLine()).equalsIgnoreCase("exit")){
                pw.println(str);
                pw.println("===" + new Date() + "===");
            }
            
            br.close();
            pw.close();
        } catch(IOException e){
            e.printStackTrace();
        } 
        
    }
    
}