用java兑现zip压缩

用java实现zip压缩

今天写了个用java压缩的功能，可以实现对文件和目录的压缩。?

由于java.util.zip.ZipOutputStream有中文乱码问题，所以采用org.apache.tools.zip.ZipOutputStream。?
以下是代码：?

1. package?net.szh.zip;??
2. ??
3. import?java.io.BufferedInputStream;??
4. import?java.io.File;??
5. import?java.io.FileInputStream;??
6. import?java.io.FileOutputStream;??
7. import?java.util.zip.CRC32;??
8. import?java.util.zip.CheckedOutputStream;??
9. ??
10. import?org.apache.tools.zip.ZipEntry;??
11. import?org.apache.tools.zip.ZipOutputStream;??
12. ??
13. public?class?ZipCompressor?{??
14. ????static?final?int?BUFFER?=?8192;??
15. ??
16. ????private?File?zipFile;??
17. ??
18. ????public?ZipCompressor(String?pathName)?{??
19. ????????zipFile?=?new?File(pathName);??
20. ????}??
21. ??
22. ????public?void?compress(String?srcPathName)?{??
23. ????????File?file?=?new?File(srcPathName);??
24. ????????if?(!file.exists())??
25. ????????????throw?new?RuntimeException(srcPathName?+?"不存在！");??
26. ????????try?{??
27. ????????????FileOutputStream?fileOutputStream?=?new?FileOutputStream(zipFile);??
28. ????????????CheckedOutputStream?cos?=?new?CheckedOutputStream(fileOutputStream,??
29. ????????????????????new?CRC32());??
30. ????????????ZipOutputStream?out?=?new?ZipOutputStream(cos);??
31. ????????????String?basedir?=?"";??
32. ????????????compress(file,?out,?basedir);??
33. ????????????out.close();??
34. ????????}?catch?(Exception?e)?{??
35. ????????????throw?new?RuntimeException(e);??
36. ????????}??
37. ????}??
38. ??
39. ????private?void?compress(File?file,?ZipOutputStream?out,?String?basedir)?{??
40. ????????/*?判断是目录还是文件?*/??
41. ????????if?(file.isDirectory())?{??
42. ????????????System.out.println("压缩："?+?basedir?+?file.getName());??
43. ????????????this.compressDirectory(file,?out,?basedir);??
44. ????????}?else?{??
45. ????????????System.out.println("压缩："?+?basedir?+?file.getName());??
46. ????????????this.compressFile(file,?out,?basedir);??
47. ????????}??
48. ????}??
49. ??
50. ????/**?压缩一个目录?*/??
51. ????private?void?compressDirectory(File?dir,?ZipOutputStream?out,?String?basedir)?{??
52. ????????if?(!dir.exists())??
53. ????????????return;??
54. ??
55. ????????File[]?files?=?dir.listFiles();??
56. ????????for?(int?i?=?0;?i?<?files.length;?i++)?{??
57. ????????????/*?递归?*/??
58. ????????????compress(files[i],?out,?basedir?+?dir.getName()?+?"/");??
59. ????????}??
60. ????}??
61. ??
62. ????/**?压缩一个文件?*/??
63. ????private?void?compressFile(File?file,?ZipOutputStream?out,?String?basedir)?{??
64. ????????if?(!file.exists())?{??
65. ????????????return;??
66. ????????}??
67. ????????try?{??
68. ????????????BufferedInputStream?bis?=?new?BufferedInputStream(??
69. ????????????????????new?FileInputStream(file));??
70. ????????????ZipEntry?entry?=?new?ZipEntry(basedir?+?file.getName());??
71. ????????????out.putNextEntry(entry);??
72. ????????????int?count;??
73. ????????????byte?data[]?=?new?byte[BUFFER];??
74. ????????????while?((count?=?bis.read(data,?0,?BUFFER))?!=?-1)?{??
75. ????????????????out.write(data,?0,?count);??
76. ????????????}??
77. ????????????bis.close();??
78. ????????}?catch?(Exception?e)?{??
79. ????????????throw?new?RuntimeException(e);??
80. ????????}??
81. ????}??
82. }??

后来发现原来可以用ant中的org.apache.tools.ant.taskdefs.Zip来实现，更加简单。

1. package?net.szh.zip;??
2. ??
3. import?java.io.File;??
4. ??
5. import?org.apache.tools.ant.Project;??
6. import?org.apache.tools.ant.taskdefs.Zip;??
7. import?org.apache.tools.ant.types.FileSet;??
8. ??
9. public?class?ZipCompressorByAnt?{??
10. ??
11. ????private?File?zipFile;??
12. ??
13. ????public?ZipCompressorByAnt(String?pathName)?{??
14. ????????zipFile?=?new?File(pathName);??
15. ????}??
16. ??????
17. ????public?void?compress(String?srcPathName)?{??
18. ????????File?srcdir?=?new?File(srcPathName);??
19. ????????if?(!srcdir.exists())??
20. ????????????throw?new?RuntimeException(srcPathName?+?"不存在！");??
21. ??????????
22. ????????Project?prj?=?new?Project();??
23. ????????Zip?zip?=?new?Zip();??
24. ????????zip.setProject(prj);??
25. ????????zip.setDestFile(zipFile);??
26. ????????FileSet?fileSet?=?new?FileSet();??
27. ????????fileSet.setProject(prj);??
28. ????????fileSet.setDir(srcdir);??
29. ????????//fileSet.setIncludes("**/*.java");?包括哪些文件或文件夹?eg:zip.setIncludes("*.java");??
30. ????????//fileSet.setExcludes(...);?排除哪些文件或文件夹??
31. ????????zip.addFileset(fileSet);??
32. ??????????
33. ????????zip.execute();??
34. ????}??
35. }??

测试一下

1. package?net.szh.zip;??
2. ??
3. public?class?TestZip?{??
4. ????public?static?void?main(String[]?args)?{??
5. ????????ZipCompressor?zc?=?new??ZipCompressor("E:\\szhzip.zip");??
6. ????????zc.compress("E:\\test");??
7. ??????????
8. ????????ZipCompressorByAnt?zca?=?new?ZipCompressorByAnt("E:\\szhzipant.zip");??
9. ????????zca.compress("E:\\test");??
10. ????}??
11. } ?

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