IO流 文件的切割和合并

package com.yyq;
import java.io.*;
import java.util.*;
/*
* 切割流
*
*/
public class SplitFile {

public static void main(String[] args) throws IOException {
// TODO Auto-generated method stub
splitFile();
merge();
}
public static void merge() throws IOException{
ArrayList<FileInputStream>al = new ArrayList<FileInputStream>();
for(int x = 1;x<=3;x++){
al.add(new FileInputStream(x+".MYpart"));
}
Iterator<FileInputStream> it = al.iterator();
final Enumeration<FileInputStream> en = new Enumeration<FileInputStream>(){
public boolean hasMoreElements(){
return it.hasNext();
}
public FileInputStream nextElement(){
return it.next();
}
};
// 获取一个圆
SequenceInputStream sis = new SequenceInputStream(en);
FileOutputStream fos = new FileOutputStream("0.jpg");
byte[] buf = new byte[1024];
int len = 0;
while((len = sis.read(buf))!=-1){
fos.write(buf,0,len);
}
fos.close();
sis.close();
}
public static void splitFile() throws IOException{
FileInputStream fis = new FileInputStream("1.jpg");
FileOutputStream fos =null;
byte[] buf = new byte[1024*1024];
int len = 0;
int count = 1;
while((len = fis.read(buf))!=-1){
fos = new FileOutputStream(""+count+++".MYpart");
//File file = new file(""+count+++".part");
fos.write(buf,0,len);
fos.close();
File file = new File(""+count+".part");
file.delete();

}
if(fos!=null){
fos.close();
}
}

}