【Java】zip解压 (片段)

wangy

1. try
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2. {
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3. java.io.File outdir = new java.io.File(解压到的路径);
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4. java.util.zip.ZipInputStream zin = new java.util.zip.ZipInputStream(new java.io.FileInputStream(zip文件的路径));
   
5. java.util.zip.ZipEntry entry;
   
6. String name, dir;
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7. while ((entry = zin.getNextEntry()) != null)
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8. {
   
9. name = entry.getName();
   
10. if(entry.isDirectory())
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11. {
    
12. mkdirs(outdir, name);
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13. continue;
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14. }
    
15. 
    
16. /* this part is necessary because file entry can come before
    
17. * directory entry where is file located
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18. * i.e.:
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19. * /foo/foo.txt
    
20. * /foo/
    
21. */
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22. 
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23. dir = dirpart(name);
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24. if(dir != null)
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25. mkdirs(outdir, dir);
    
26. 
    
27. extractFile(zin, outdir, name);
    
28. }
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29. zin.close();
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30. }
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31. catch (java.io.IOException e)
    
32. {
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33. e.printStackTrace();
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34. }
    
35. }
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36. private static void extractFile(java.util.zip.ZipInputStream in, java.io.File outdir, String name) throws java.io.IOException
    
37. {
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38. byte[] buffer = new byte[4096];
    
39. java.io.BufferedOutputStream out = new java.io.BufferedOutputStream(new java.io.FileOutputStream(new java.io.File(outdir, name)));
    
40. int count = -1;
    
41. while ((count = in.read(buffer)) != -1)
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42. out.write(buffer, 0, count);
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43. out.close();
    
44. }
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45. 
    
46. private static void mkdirs(java.io.File outdir, String path)
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47. {
    
48. java.io.File d = new java.io.File(outdir, path);
    
49. if(!d.exists())
    
50. d.mkdirs();
    
51. }
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52. 
    
53. private static String dirpart(String name)
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54. {
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55. int s = name.lastIndexOf(java.io.File.separatorChar);
    
56. return s == -1 ? null : name.substring(0, s);

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