NIo写字符到文件

package test;

import jdk.nashorn.internal.ir.CallNode;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;

/**
 * 使用NIO输出文字到文本中
 */
public class Niodemo {

    public static void main(String[] args)  throws  Exception {
        String s="Nio 学习";
        //创建输出流
        FileOutputStream fileOutputStream = new FileOutputStream("d:\\nio.txt");
        //获取fileChannel
        FileChannel channel = fileOutputStream.getChannel();
        //创建BUffer
        ByteBuffer byteBuffer = ByteBuffer.allocate(1024);
        //将s字符串存入Buffer
        byteBuffer.put(s.getBytes());
        //byteBuffer 反转
        byteBuffer.flip();
        //将byteBuffer 写入fileChannel
        channel.write(byteBuffer);
        //关闭流
        fileOutputStream.close();


    }
}

NiO