JAVA-NIO

package tx;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;

public class a {
 public static void main(String[] args) {
	writeFileByNIO();
	readFileByNIO();
}

    public static void readFileByNIO() {
	// TODO Auto-generated method stub
	try {
		FileInputStream p=new FileInputStream("D:\\nio.txt");
		FileChannel k=p.getChannel();
		ByteBuffer buffer =ByteBuffer.allocate(1024);
		k.read(buffer);
		buffer.flip();
		StringBuffer sb= new  StringBuffer ();
		while (buffer.remaining()>0){
			byte b=buffer.get();
			sb.append((char)b);
			
		}
		System .out.println("读取:"+sb);
		k.close();
		p.close();
	} catch (Exception e) {
		// TODO: handle exception
		e.printStackTrace();
	}
		
	
}

    public static void writeFileByNIO() {
	// TODO Auto-generated method stub
    	
	try {
		File file=new File("D:\\nio.txt");
		FileOutputStream n= new  FileOutputStream(file);
		FileChannel m=n.getChannel();
		ByteBuffer buffer =ByteBuffer.allocate(1024);
		String str="Hello NIO";
		buffer.put(str.getBytes());
		buffer.flip();
		m.write(buffer);
		m.close();
		n.close();
	} catch (Exception e) {
		// TODO: handle exception
		e.printStackTrace();
	}
}
}