Java——新IO 通道

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

//=================================================
// File Name       :	FileChannel_demo
//------------------------------------------------------------------------------
// Author          :	Common



//主类
//Function        : 	FileChannel_demo
public class FileChannel_demo {

	public static void main(String[] args) throws Exception{
		// TODO 自动生成的方法存根
		String info[] = {"123","456","789"};
		File f = new File("/home/common/software/coding/HelloWord/HelloWord/out.txt");//路径
		FileOutputStream output = null;
		output = new FileOutputStream(f);	
		FileChannel fout = null;							//声明输出的通道
		fout = output.getChannel();						//得到输出的文件通道
		ByteBuffer buf = ByteBuffer.allocate(1024);		//开辟缓冲
		for(int i=0;i<info.length;i++){
			buf.put(info[i].getBytes());
		}
		buf.flip();				//重设缓冲区，准备输出
		fout.write(buf);	//输出
		fout.close();
		output.close();
		
	}

}

 读写文件

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

//=================================================
// File Name       :	FileChannel_demo
//------------------------------------------------------------------------------
// Author          :	Common



//主类
//Function        : 	FileChannel_demo
public class FileChannel_demo {

	public static void main(String[] args) throws Exception{
		// TODO 自动生成的方法存根
		
		File f1 = new File("/home/common/software/coding/HelloWord/HelloWord/out.txt");//路径
		File f2 = new File("/home/common/software/coding/HelloWord/HelloWord/outnote.txt");//路径
		FileInputStream input = null;
		FileOutputStream output = null;
		input = new FileInputStream(f1);
		output = new FileOutputStream(f2);	
		FileChannel fin = null;							//声明输入的通道
		FileChannel fout = null;						//声明输出的通道
		fin = input.getChannel();						//得到输入的文件通道
		fout = output.getChannel();						//得到输出的文件通道
		ByteBuffer buf = ByteBuffer.allocate(1024);		//开辟缓冲
		int temp = 0;											//声明变量接收内容
		while((temp=fin.read(buf)) != -1){
			buf.flip();
			fout.write(buf);
			buf.clear();
		}
		fin.close();
		fout.close();
		input.close();
		output.close();
		
	}

}