java的IO流来实现一个最简单的文件复制

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

public class FileCopy {

	public static int SIZE = 1024;
	public static void main(String[] args) {
		
		File file1 = new File("1.jpg");
		FileInputStream in = null;
		FileOutputStream out = null;
		
		try{
			File file2 = new File("2.jpg");
			
			in = new FileInputStream(file1);
			
			out = new FileOutputStream(file2);
			
			byte array[] = new byte[SIZE];
			
			int len = 0;
			
			while((len=in.read(array))!=-1){
				out.write(array,0,len);
			}	
		}catch(IOException e){
			try {
				in.close();
				out.close();
			} catch (IOException e1) {
				// TODO Auto-generated catch block
				e1.printStackTrace();
			}
		}
	}
}

利用此方法可以实现文件的复制效果！