RandomAccessFile兑现随机读取

package com.test;import java.io.FileOutputStream;import java.io.RandomAccessFile;public class Test {	/**	 * @param args	 */	public static void main(String[] args) throws Exception {		RandomAccessFile randomAccessFile = new RandomAccessFile("c:\\a.rar",				"r");		// System.out.println(randomAccessFile.length());		// randomAccessFile.skipBytes(1000);		// randomAccessFile.skipBytes(1000);		FileOutputStream outputStream = new FileOutputStream("c:\\b.rar");		byte[] b = new byte[1024];		int i = -1;		while ((i = randomAccessFile.read(b, 0, b.length)) != -1) {			System.out.println(randomAccessFile.getFilePointer());			outputStream.write(b, 0, i);			// randomAccessFile.skipBytes(1024);		}		outputStream.close();		randomAccessFile.close();	}}