文件复制的另一种选择，使用FileChannel复制文件

通常来说，FileChannel比普通的缓冲输入输出流有更高的效率

 

 

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.nio.channels.FileChannel;

 

public class fileChannelCopy {

 

    public static void copy(File s, File d) {

        FileInputStream fi = null;

        FileOutputStream fo = null;

        FileChannel in = null;

        FileChannel out = null;

 

        try {

            fi = new FileInputStream(s);

            fo = new FileOutputStream(d);

            in = fi.getChannel();//得到对应的文件通道

            out = fo.getChannel();//得到对应的文件通道

            in.transferTo(0, in.size(), out);//连接两个通道，并且从in通道读取，然后写入out通道

 

        } catch (IOException e) {

            e.printStackTrace();

        } finally {

            try {

                fi.close();

                in.close();

                fo.close();

                out.close();

            } catch (IOException e) {

                e.printStackTrace();

            }

        }

    }

 

    public static void main(String[] args) {

        File s = new File("e:\\java.zip");

        File d = new File("d:\\java.zip");

        new fileChannelCopy().copy(s,d);

        System.out.println("复制完成");

    }

}