黑马程序员——文件的切割，与合并

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package com.io.properties;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.SequenceInputStream;import java.util.Enumeration;import java.util.Vector;public class SplitFile {public static void main(String[] args) {try {//split();heBing();} catch (IOException e) {e.printStackTrace();}}/* * 合并多个文件成一个文件 */public static void heBing() throws IOException{Vector<FileInputStream> v=new Vector<FileInputStream>();v.add(new FileInputStream("g:/java/1.part"));v.add(new FileInputStream("g:/java/2.part"));v.add(new FileInputStream("g:/java/3.part"));v.add(new FileInputStream("g:/java/4.part"));Enumeration<FileInputStream>en=v.elements();SequenceInputStream sis=new SequenceInputStream(en);int num=0;FileOutputStream fos=new FileOutputStream("g:/java/hebing.mp3");byte[]b=new byte[1024];while(-1!=(num=sis.read(b))){fos.write(b,0,num);fos.flush();}fos.close();sis.close();}/* * 切割文件，把一个文件按指定大小进行切割，分割成多个文件 */public static void split() throws IOException{FileInputStream fis=new FileInputStream(new File("g:/java/a.mp3"));FileOutputStream fos=null;byte[]b=new byte[1024*1024*5];//大小是5Mint num=0;int count=1;while(-1!=(num=fis.read(b))){fos=new FileOutputStream(new File("g:/java/"+ count++ +".part"));fos.write(b,0,num);fos.close();}fis.close();}}

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