java实现将ZIP压缩文件解压的工具类

柔情只为你懂 2022-08-27 11:46 191阅读 0赞

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1.  **package** com.lanp; 
2.  
3.  **import** java.io.File; 
4.  **import** java.io.FileInputStream; 
5.  **import** java.io.FileOutputStream; 
6.  **import** java.io.IOException; 
7.  **import** java.util.zip.ZipEntry; 
8.  **import** java.util.zip.ZipException; 
9.  **import** java.util.zip.ZipFile; 
10. **import** java.util.zip.ZipInputStream; 
11. 
12. /\*\*
13.  \* 解压ZIP压缩文件到指定的目录
14.  \* @author LanP
15.  \* @since 2012-3-13 8:57:18
16.  \*/
17. **public****final****class** ZipToFile \{ 
18. /\*\*
19.  \* 缓存区大小默认20480
20.  \*/
21. **private****final****static****int** FILE\_BUFFER\_SIZE = 20480; 
22. 
23. **private** ZipToFile() \{ 
24. 
25.  \} 
26. 
27. /\*\*
28.  \* 将指定目录的ZIP压缩文件解压到指定的目录
29.  \* @param zipFilePath ZIP压缩文件的路径
30.  \* @param zipFileName ZIP压缩文件名字
31.  \* @param targetFileDir ZIP压缩文件要解压到的目录
32.  \* @return flag 布尔返回值
33.  \*/
34. **public****static****boolean** unzip(String zipFilePath, String zipFileName, String targetFileDir)\{ 
35. **boolean** flag = **false**; 
36. //1.判断压缩文件是否存在，以及里面的内容是否为空
37.  File file = **null**; //压缩文件(带路径)
38.  ZipFile zipFile = **null**; 
39.  file = **new** File(zipFilePath + "/" \+ zipFileName); 
40.  System.out.println(">>>>>>解压文件【" \+ zipFilePath + "/" \+ zipFileName + "】到【" \+ targetFileDir + "】目录下<<<<<<"); 
41. **if**(**false** == file.exists()) \{ 
42.  System.out.println(">>>>>>压缩文件【" \+ zipFilePath + "/" \+ zipFileName + "】不存在<<<<<<"); 
43. **return****false**; 
44.  \} **else****if**(0 == file.length()) \{ 
45.  System.out.println(">>>>>>压缩文件【" \+ zipFilePath + "/" \+ zipFileName + "】大小为0不需要解压<<<<<<"); 
46. **return****false**; 
47.  \} **else** \{ 
48. //2.开始解压ZIP压缩文件的处理
49. **byte**\[\] buf = **new****byte**\[FILE\_BUFFER\_SIZE\]; 
50. **int** readSize = -1; 
51.  ZipInputStream zis = **null**; 
52.  FileOutputStream fos = **null**; 
53. **try** \{ 
54. // 检查是否是zip文件
55.  zipFile = **new** ZipFile(file); 
56.  zipFile.close(); 
57. // 判断目标目录是否存在，不存在则创建
58.  File newdir = **new** File(targetFileDir); 
59. **if** (**false** == newdir.exists()) \{ 
60.  newdir.mkdirs(); 
61.  newdir = **null**; 
62.  \} 
63.  zis = **new** ZipInputStream(**new** FileInputStream(file)); 
64.  ZipEntry zipEntry = zis.getNextEntry(); 
65. // 开始对压缩包内文件进行处理
66. **while** (**null** != zipEntry) \{ 
67.  String zipEntryName = zipEntry.getName().replace('\\\\', '/'); 
68. //判断zipEntry是否为目录，如果是，则创建
69. **if**(zipEntry.isDirectory()) \{ 
70. **int** indexNumber = zipEntryName.lastIndexOf('/'); 
71.  File entryDirs = **new** File(targetFileDir + "/" \+ zipEntryName.substring(0, indexNumber)); 
72.  entryDirs.mkdirs(); 
73.  entryDirs = **null**; 
74.  \} **else** \{ 
75. **try** \{ 
76.  fos = **new** FileOutputStream(targetFileDir + "/" \+ zipEntryName); 
77. **while** ((readSize = zis.read(buf, 0, FILE\_BUFFER\_SIZE)) != -1) \{ 
78.  fos.write(buf, 0, readSize); 
79.  \} 
80.  \} **catch** (Exception e) \{ 
81.  e.printStackTrace(); 
82. **throw****new** RuntimeException(e.getCause()); 
83.  \} **finally** \{ 
84. **try** \{ 
85. **if** (**null** != fos) \{ 
86.  fos.close(); 
87.  \} 
88.  \} **catch** (IOException e) \{ 
89.  e.printStackTrace(); 
90. **throw****new** RuntimeException(e.getCause()); 
91.  \} 
92.  \} 
93.  \} 
94.  zipEntry = zis.getNextEntry(); 
95.  \} 
96.  flag = **true**; 
97.  \} **catch** (ZipException e) \{ 
98.  e.printStackTrace(); 
99. **throw****new** RuntimeException(e.getCause()); 
100.  \} **catch** (IOException e) \{ 
101.  e.printStackTrace(); 
102. **throw****new** RuntimeException(e.getCause()); 
103.  \} **finally** \{ 
104. **try** \{ 
105. **if** (**null** != zis) \{ 
106.  zis.close(); 
107.  \} 
108. **if** (**null** != fos) \{ 
109.  fos.close(); 
110.  \} 
111.  \} **catch** (IOException e) \{ 
112.  e.printStackTrace(); 
113. **throw****new** RuntimeException(e.getCause()); 
114.  \} 
115.  \} 
116.  \} 
117. **return** flag; 
118.  \} 
119. 
120. /\*\*
121.  \* 测试用的Main方法
122.  \*/
123. **public****static****void** main(String\[\] args) \{ 
124.  String zipFilePath = "C:\\\\home"; 
125.  String zipFileName = "lp20120301.zip"; 
126.  String targetFileDir = "C:\\\\home\\\\lp20120301"; 
127. **boolean** flag = ZipToFile.unzip(zipFilePath, zipFileName, targetFileDir); 
128. **if**(flag) \{ 
129.  System.out.println(">>>>>>解压成功<<<<<<"); 
130.  \} **else** \{ 
131.  System.out.println(">>>>>>解压失败<<<<<<"); 
132.  \} 
133.  \} 
134. 
135. \}

[view plain]: http://blog.csdn.net/lanpiao_87/article/details/7350820#