zip压缩/解压缩带空文件夹的文件

落日映苍穹つ 2022-05-03 05:56 395阅读 0赞

# zip压缩/解压缩带空文件夹的文件 #

2011年07月21日 20:04:54 [flex\_work][flex_work] 阅读数：7152 标签： [file][][string][][byte][][buffer][][null][][include][] 更多

个人分类： [Flex And Java][]

在EncryptZip的项目中对Zip的加密/解密没有包含带子文件夹的需求, 只有一层的关系.

在此文中给出普通的zip压缩/解压缩的Java代码,  压缩时递归压缩文件,包含文件及文件下的空文件夹. 若Flex端需要类似的功能, 可以参考本文中的zipFileWithTier 和unZipFileWithTier方法.

代码如下:

1.  `public class ZipFileWithTier {`
2.   
3.  `private static final String zipPath = "C:\\temp\\Lemur\\empty.zip";`
4.  `private static final String unzipPath = "C:\\temp\\Lemur\\";`
5.  `private static final String srcFiles = "C:\\temp\\Lemur\\empty";`
6.   
7.  `@Test`
8.  `public void zipFile(){`
9.  `File file = new File(zipPath);`
10. `if(file.exists())`
11. `file.delete();`
12. `zipFileWithTier(srcFiles, zipPath);`
13. `}`
14.  
15. `@Test`
16. `public void upZipFile(){`
17. `try {`
18. `unzipFilesWithTier(readFileByte(zipPath), unzipPath + File.separator);`
19. `} catch (IOException e) {`
20.  
21. `e.printStackTrace();`
22. `}`
23. `}`
24.  
25. `/*`
26. `* Compress the specify file that contains sub-folders and store them to a zipfile.`
27. `* @param srcFiles: the file will be compressed`
28. `* @param zipPath: the location which stores the zipfile.`
29. `*/`
30. `public static void zipFileWithTier(String srcFiles, String zipPath) {`
31. `try {`
32.  
33. `FileOutputStream zipFile = new FileOutputStream(zipPath);`
34. `BufferedOutputStream buffer = new BufferedOutputStream(zipFile);`
35. `ZipOutputStream out = new ZipOutputStream(buffer);`
36. `zipFiles(srcFiles, out, "");`
37. `out.close();`
38. `} catch (IOException e) {`
39. `// TODO Auto-generated catch block`
40. `e.printStackTrace();`
41. `}`
42. `}`
43.  
44. `/*`
45. `* Recursive the specify file also contains the folder which may don't include any file.`
46. `* @param filePath: compress file`
47. `* @param ZipOutputStream: the zipfile's outputStream.`
48. `* @param prefix: the prefix indicates the parent folder name of the file that makes the tier relation.`
49. `*/`
50. `public static void zipFiles(String filePath, ZipOutputStream out, String prefix)`
51. `throws IOException {`
52. `File file = new File(filePath);`
53. `if (file.isDirectory()) {`
54. `if (file.listFiles().length == 0) {`
55. `ZipEntry zipEntry = new ZipEntry(prefix + file.getName() + "/");`
56. `out.putNextEntry(zipEntry);`
57. `out.closeEntry();`
58. `} else {`
59. `prefix += file.getName() + File.separator;`
60. `for (File f : file.listFiles())`
61. `zipFiles(f.getAbsolutePath(), out, prefix);`
62. `}`
63. `} else {`
64. `FileInputStream in = new FileInputStream(file);`
65. `ZipEntry zipEntry = new ZipEntry(prefix + file.getName());`
66. `out.putNextEntry(zipEntry);`
67. `byte[] buf = new byte[1024];`
68. `int len;`
69. `while ((len = in.read(buf)) > 0) {`
70. `out.write(buf, 0, len);`
71. `}`
72. `out.closeEntry();`
73. `in.close();`
74. `}`
75.  
76. `}`
77.  
78. `/*`
79. `* Unzip the file also contains the folder which the listFiles's length is 0.`
80. `* @param bytes: the content of the zipfile by byte array. *`
81. `* @param prefix: the prefix is the root of the store path.`
82. `* @IOExcetion: the ioexception during unzipFiles.`
83. `*/`
84. `public static void unzipFilesWithTier(byte[] bytes, String prefix) throws IOException {`
85.  
86. `InputStream bais = new ByteArrayInputStream(bytes);`
87. `ZipInputStream zin = new ZipInputStream(bais);`
88. `ZipEntry ze;`
89. `while ((ze = zin.getNextEntry()) != null) {`
90. `if (ze.isDirectory()) {`
91. `File file = new File(prefix + ze.getName());`
92. `if (!file.exists())`
93. `file.mkdirs();`
94. `continue;`
95. `}`
96. `File file = new File(prefix + ze.getName());`
97. `if (!file.getParentFile().exists())`
98. `file.getParentFile().mkdirs();`
99. `ByteArrayOutputStream toScan = new ByteArrayOutputStream();`
100. `byte[] buf = new byte[1024];`
101. `int len;`
102. `while ((len = zin.read(buf)) > 0) {`
103. `toScan.write(buf, 0, len);`
104. `}`
105. `byte[] fileOut = toScan.toByteArray();`
106. `toScan.close();`
107. `writeByteFile(fileOut, new File(prefix + ze.getName()));`
108. `}`
109. `zin.close();`
110. `bais.close();`
111. `}`
112.  
113. `public static byte[] readFileByte(String filename) throws IOException {`
114.  
115. `if (filename == null || filename.equals("")) {`
116. `throw new NullPointerException("File is not exist!");`
117. `}`
118. `File file = new File(filename);`
119. `long len = file.length();`
120. `byte[] bytes = new byte[(int) len];`
121.  
122. `BufferedInputStream bufferedInputStream = new BufferedInputStream(`
123. `new FileInputStream(file));`
124. `int r = bufferedInputStream.read(bytes);`
125. `if (r != len)`
126. `throw new IOException("Read file failure!");`
127. `bufferedInputStream.close();`
128.  
129. `return bytes;`
130.  
131. `}`
132.  
133. `public static String writeByteFile(byte[] bytes, File file) {`
134. `FileOutputStream fos = null;`
135. `try {`
136. `fos = new FileOutputStream(file);`
137. `fos.write(bytes);`
138. `} catch (FileNotFoundException e) {`
139. `e.printStackTrace();`
140.  
141. `} catch (IOException e) {`
142. `e.printStackTrace();`
143. `} finally {`
144. `if (fos != null) {`
145. `try {`
146. `fos.close();`
147. `} catch (IOException e) {`
148. `e.printStackTrace();`
149. `}`
150. `}`
151. `}`
152. `return "success";`
153. `}`
154.  
155.  
156.  
157. `}`

(转贴请注明出处)

Author:David

Mail:xiang.okay@gmail.com

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