java解压缩文件

1. import java.io.BufferedOutputStream;  
2. import java.io.File;  
3. import java.io.FileOutputStream;  
4. import java.io.IOException;  
5. import java.io.InputStream;  
6. import java.util.Enumeration;  
7.   
8. import org.apache.tools.zip.ZipEntry;  
9. import org.apache.tools.zip.ZipFile;  
10.   
11. /** 
12.  * 可以处理中文文件名 
13.  */  
14. public class UnZip2   
15. {  
16.     private static final int buffer = 2048;  
17.       
18.     public static void main(String[] args)  
19.     {  
20.         unZip("D:\\ss\\test.zip");  
21.     }  
22.       
23.     public static void unZip(String path)  
24.     {  
25.         int count = -1;  
26.         int index = -1;  
27.         String savepath = "";  
28.         boolean flag = false;  
29.           
30.         File file = null;   
31.         InputStream is = null;    
32.         FileOutputStream fos = null;    
33.         BufferedOutputStream bos = null;  
34.           
35.         savepath = path.substring(0, path.lastIndexOf("\\")) + "\\";  
36.   
37.         try  
38.         {   
39.             ZipFile zipFile = new ZipFile(path);   
40.   
41.             Enumeration<?> entries = zipFile.getEntries();  
42.               
43.             while(entries.hasMoreElements())  
44.             {   
45.                 byte buf[] = new byte[buffer];   
46.                   
47.                 ZipEntry entry = (ZipEntry)entries.nextElement();   
48.                   
49.                 String filename = entry.getName();  
50.                 index = filename.lastIndexOf("/");  
51.                 if(index > -1)  
52.                     filename = filename.substring(index+1);  
53.                   
54.                 filename = savepath + filename;  
55.                   
56.                 flag = isPics(filename);  
57.                 if(!flag)  
58.                     continue;  
59.                   
60.                 file = new File(filename);   
61.                 file.createNewFile();  
62.                   
63.                 is = zipFile.getInputStream(entry);   
64.                   
65.                 fos = new FileOutputStream(file);   
66.                 bos = new BufferedOutputStream(fos, buffer);  
67.                   
68.                 while((count = is.read(buf)) > -1)  
69.                 {   
70.                     bos.write(buf, 0, count );   
71.                 }   
72.                   
73.                 fos.close();   
74.   
75.                 is.close();   
76.             }   
77.               
78.             zipFile.close();   
79.               
80.         }catch(IOException ioe){   
81.             ioe.printStackTrace();   
82.         }   
83.     }   
84.   
85.     public static boolean isPics(String filename)  
86.     {  
87.         boolean flag = false;  
88.           
89.         if(filename.endsWith(".jpg") || filename.endsWith(".gif")  || filename.endsWith(".bmp") || filename.endsWith(".png"))  
90.             flag = true;  
91.           
92.         return flag;  
93.     }  
94. }