NIO学习

第一个自己写的nio程序

文件复制：

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.util.Date;

public class NioClass {
    
    
    public NioClass() {
        // TODO Auto-generated constructor stub
    }
    
    public static void copyFile(String orignal, String destFile) throws IOException {
        
        
        FileInputStream fileInput = new FileInputStream(orignal);
        
        FileOutputStream fileOut = new FileOutputStream(destFile);
        
        FileChannel inputChannel = fileInput.getChannel();
        
        FileChannel outputChannel = fileOut.getChannel();
        
        ByteBuffer bf = ByteBuffer.allocate(1024);
        
        while (true) {
            
            bf.clear();
            
            int len = inputChannel.read(bf);
            
            if (len == -1) {
                break;
            }
            bf.flip();
            
            outputChannel.write(bf);
            System.out.println("执行复制");
        }
        fileInput.close();
        fileOut.close();
    }
    
    public static void main(String[] args) throws IOException {
        
        
        NioClass nc = new NioClass();
        System.out.println(new Date().getTime());
        nc.copyFile("C:\\Users\\sss\\Desktop\\ddd\\orignial.txt", "C:\\Users\\sss\\Desktop\\ddd\\dest.txt");
        System.out.println(new Date().getTime());
    }
}