java-SequenceInputStream，切割、…

import java.util.*;
import java.io.*;
class<wbr> CombFileDemo<br> {<br><wbr>public static void main(String[] args) throws IOException<br><wbr>{<br><wbr><wbr>//combFile_Vector();<br><wbr><wbr>String path = "splitFile\\";<br><wbr><wbr>String ansName = "Adele-Someone Like You.mp3";<wbr><wbr><br><wbr><wbr>String ansFilter = ".spl";</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr>splitFile(path, ansName, ".spl");</wbr></wbr>

<wbr><wbr>String tagName = "Adele-Someone Like You(comb).mp3";<br><wbr><wbr>int splitCnt = 5;</wbr></wbr></wbr></wbr>

<wbr><wbr>combFile_ArrayList(path, tagName, ansFilter, splitCnt);<br><wbr>}</wbr></wbr></wbr>

<wbr>public static void combFile_Vector() throws IOException<br><wbr>{<br><wbr><wbr>FileInputStream fis1 = new FileInputStream("1.txt");<br><wbr><wbr>FileInputStream fis2 = new FileInputStream("2.txt");<br><wbr><wbr>FileInputStream fis3 = new FileInputStream("3.txt");</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr>//用Vector是因为它有一个方法可以直接返回枚举类型.elements(),但是效率低.<br><wbr><wbr>Vector&lt;FileInputStream&gt; v = new Vector&lt;FileInputStream&gt;();</wbr></wbr></wbr></wbr>

<wbr><wbr>v.add(fis1);<br><wbr><wbr>v.add(fis2);<br><wbr><wbr>v.add(fis3);<br><wbr><wbr><br><wbr><wbr>Enumeration &lt;FileInputStream&gt; er = v.elements();<br><wbr><wbr>SequenceInputStream sis = new SequenceInputStream(er);<wbr> //构造函数结构枚举类型的参数.</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr>FileOutputStream fos = new FileOutputStream("123.txt");<wbr><wbr><br><wbr><wbr><br><wbr><wbr>byte [] buf = new byte[1024];<br><wbr><wbr>int num = 0;<br><wbr><wbr>while((num = sis.read(buf)) != -1)<br><wbr><wbr>{<br><wbr><wbr><wbr>fos.write(buf, 0, num);<br><wbr><wbr>}<br><wbr><wbr><br><wbr><wbr>sis.close(); //关掉关联的三个流.<br><wbr><wbr>fos.close();<br><wbr>}</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr>public static void combFile_ArrayList(String path, String tagName, String ansFilter, int cnt) throws IOException<br><wbr>{<br><wbr><wbr>ArrayList&lt;FileInputStream&gt; al = new ArrayList&lt;FileInputStream&gt;();<br><wbr><wbr><br><wbr><wbr>for (int x = 1; x &lt;=cnt; x++)<br><wbr><wbr>{<br><wbr><wbr><wbr>al.add(new FileInputStream(path + x+ansFilter)); //在合并的文件名有规律的情况下.<br><wbr><wbr>}</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr>final Iterator &lt;FileInputStream&gt; it = al.iterator();</wbr></wbr>

<wbr><wbr>//自定义一个枚举类型<br><wbr><wbr>Enumeration &lt;FileInputStream&gt; er = new Enumeration &lt;FileInputStream&gt; ()<br><wbr><wbr>{<br><wbr><wbr><wbr>public boolean hasMoreElements()<br><wbr><wbr><wbr>{<br><wbr><wbr><wbr><wbr>return it.hasNext();<br><wbr><wbr><wbr>}<br><wbr><wbr><wbr>public FileInputStream nextElement()<br><wbr><wbr><wbr>{<br><wbr><wbr><wbr><wbr>return it.next();<br><wbr><wbr><wbr>}<br><wbr><wbr>};</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr>SequenceInputStream sis = new SequenceInputStream(er);<wbr><wbr> //构造函数结构枚举类型的参数.<br><wbr><wbr>FileOutputStream fos = new FileOutputStream(path + tagName);<wbr><wbr><br><wbr><wbr><br><wbr><wbr>byte [] buf = new byte[1024];<br><wbr><wbr>int num = 0;<br><wbr><wbr>while((num = sis.read(buf)) != -1)<br><wbr><wbr>{<br><wbr><wbr><wbr>fos.write(buf, 0, num);<br><wbr><wbr>}<br><wbr><wbr><br><wbr><wbr>sis.close(); //关掉关联的三个流.<br><wbr><wbr>fos.close();<br><wbr>}</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr>//切割文件<br><wbr>public static void splitFile(String path, String fileName, String filter) throws IOException<br><wbr>{<br><wbr><wbr>FileInputStream fis = new FileInputStream(path + fileName);</wbr></wbr></wbr></wbr></wbr>

<wbr><wbr>byte[] b = new byte[1024*1024];<wbr> //按照1M的大小进行切割.<br><wbr><wbr>FileOutputStream fos = null;<br><wbr><wbr>int num = 0;<br><wbr><wbr>int len = 0;<br><wbr><wbr>while ((len = fis.read(b)) != -1)<br><wbr><wbr>{<br><wbr><wbr><wbr>fos = new FileOutputStream(path + (++num)+filter);<br><wbr><wbr><wbr>fos.write(b, 0, len);<br><wbr><wbr><wbr>fos.close();<br><wbr><wbr>}<br><wbr><wbr>fis.close();<br><wbr>}<br> }<br></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>