nio通道通信实现的文件复制

package edzy.nio;

import org.junit.Test;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
import java.nio.file.Paths;
import java.nio.file.StandardOpenOption;

public class Channel {
 @Test
    public void transfer(){
        FileChannel in = null;
        FileChannel out = null;
        try {
            in = FileChannel.open(Paths.get("./src/main/java/edzy/nio/s.jpg"),StandardOpenOption.READ);
            out = FileChannel.open(Paths.get("./src/main/java/edzy/nio/s5.jpg"),StandardOpenOption.READ,StandardOpenOption.WRITE,StandardOpenOption.CREATE_NEW);
            //nio通道通信
　　　　　　　　　out.transferFrom(in,0,in.size());

        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            if(out != null){
                try {
                    out.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }

            if(in != null){
                try {
                    in.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }


        }
    }


}