文件的切割与合并

             

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1. package com.io.properties;  
2.   
3. import java.io.File;  
4. import java.io.FileInputStream;  
5. import java.io.FileOutputStream;  
6. import java.io.IOException;  
7. import java.io.SequenceInputStream;  
8. import java.util.Enumeration;  
9. import java.util.Vector;  
10.   
11. public class SplitFile {  
12.     public static void main(String[] args) {  
13.         try {  
14.             //split();   
15.             heBing();  
16.         } catch (IOException e) {  
17.             e.printStackTrace();  
18.         }  
19.     }  
20.     /* 
21.      * 合并多个文件成一个文件 
22.      */  
23.     public static void heBing() throws IOException{  
24.         Vector<FileInputStream> v=new Vector<FileInputStream>();  
25.         v.add(new FileInputStream("g:/java/1.part"));  
26.         v.add(new FileInputStream("g:/java/2.part"));  
27.         v.add(new FileInputStream("g:/java/3.part"));  
28.         v.add(new FileInputStream("g:/java/4.part"));  
29.         Enumeration<FileInputStream>en=v.elements();  
30.         SequenceInputStream sis=new SequenceInputStream(en);  
31.         int num=0;  
32.         FileOutputStream fos=new FileOutputStream("g:/java/hebing.mp3");  
33.         byte[]b=new byte[1024];  
34.         while(-1!=(num=sis.read(b))){  
35.             fos.write(b,0,num);  
36.             fos.flush();  
37.         }  
38.         fos.close();  
39.         sis.close();  
40.     }  
41.       
42.     /* 
43.      * 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 
44.      */  
45.     public static void split() throws IOException{  
46.         FileInputStream fis=new FileInputStream(new File("g:/java/a.mp3"));  
47.         FileOutputStream fos=null;  
48.         byte[]b=new byte[1024*1024*5];//大小是5M   
49.         int num=0;  
50.         int count=1;  
51.         while(-1!=(num=fis.read(b))){  
52.             fos=new FileOutputStream(new File("g:/java/"+ count++ +".part"));  
53.             fos.write(b,0,num);  
54.             fos.close();  
55.         }  
56.         fis.close();  
57.       
58.     }  
59. }  

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5M
		int 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();
	
	}
}