文件操作

package my;

import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;

public class Test
{
	
	
	public static void main(String[] args)
	{
		File f = new File("C:/1.work/1.txt");
		
		
		if(f.isFile())
		{
			System.out.println("File :"+f);
			long size = f.length();
			System.out.println("size:"+size);
		}
		if(f.isDirectory())
		{
			System.out.println("exit");
		}
		
		long lastModified = f.lastModified();
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		String timestr = sdf.format(new Date(lastModified));
		
		System.out.println("lastModified:" +lastModified);
	}
	

}