文件读写操作

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;

public class FileReaderAndWriter
{
    public static void main(String[] args)
    {
        String srcFilePathName = "D:/test.txt";
        String targetFilePathName = "z:/test.txt";
        MultiFileOperation(srcFilePathName, targetFilePathName);
    }

    public static void MultiFileOperation(String srcFilePathName, String targetFilePathName)
    {
        /** 通过NIO实现文件读写方式1 */
        FileInputStream fin1 = null;
        FileOutputStream fout1 = null;
        long start = 0;
        try
        {
            fin1 = new FileInputStream(srcFilePathName);
            fout1 = new FileOutputStream(targetFilePathName);
            FileChannel fcin = fin1.getChannel();
            FileChannel fcout = fout1.getChannel();
            int fileLength = (int) fcin.size();
            start = System.currentTimeMillis();
            fcin.transferTo(0, fileLength, fcout);
        }
        catch (FileNotFoundException e)
        {
            e.printStackTrace();
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
        finally
        {
            try
            {
                fin1.close();
                fout1.close();
            }
            catch (IOException e)
            {
                e.printStackTrace();
            }
        }
        long end = System.currentTimeMillis();
        long time1 = end - start;
        System.out.println("NIO_time1: " + time1);
       

        /** 通过NIO实现文件读写方式2 */
        FileInputStream fin11 = null;
        FileOutputStream fout11 = null;
        try
        {
            fin11 = new FileInputStream(srcFilePathName);
            fout11 = new FileOutputStream(targetFilePathName);
            FileChannel fcin11 = fin11.getChannel();
            FileChannel fcout11 = fout11.getChannel();
            ByteBuffer buffer = ByteBuffer.allocate(512);
            start = System.currentTimeMillis();
            while (fcin11.read(buffer) != -1)
            {
                buffer.flip();
                fcout11.write(buffer);
                /** 从缓冲区写入数据之后调用此方法，以防写入不完整 */
                buffer.compact();
                buffer.clear();
            }
        }
        catch (FileNotFoundException e)
        {
            e.printStackTrace();
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
        finally
        {
            try
            {
                fin11.close();
                fout11.close();
            }
            catch (IOException e)
            {
                e.printStackTrace();
            }
        }
        end = System.currentTimeMillis();
        long time11 = end - start;
        System.out.println("NIO_time2: " + time11);
    }
}