RandomAccessFile实现随机读取

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();}}