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Android zip资料压缩解压缩

热度:45   发布时间:2016-05-01 16:59:25.0
Android zip文件压缩解压缩
DirTraversal.java
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01 package com.once; 

02   

03 import java.io.File; 

04 import java.util.ArrayList; 

05 import java.util.LinkedList; 

06 /** 

07  *  文件夹遍历 

08  * @author once 

09  * 

10  */

11 public class DirTraversal { 

12       

13     //no recursion 

14     public static LinkedList<File> listLinkedFiles(String strPath) { 

15         LinkedList<File> list = new LinkedList<File>(); 

16         File dir = new File(strPath); 

17         File file[] = dir.listFiles(); 

18         for (int i = 0; i < file.length; i++) { 

19             if (file[i].isDirectory()) 

20                 list.add(file[i]); 

21             else

22                 System.out.println(file[i].getAbsolutePath()); 

23         } 

24         File tmp; 

25         while (!list.isEmpty()) { 

26             tmp = (File) list.removeFirst(); 

27             if (tmp.isDirectory()) { 

28                 file = tmp.listFiles(); 

29                 if (file == null) 

30                     continue; 

31                 for (int i = 0; i < file.length; i++) { 

32                     if (file[i].isDirectory()) 

33                         list.add(file[i]); 

34                     else

35                         System.out.println(file[i].getAbsolutePath()); 

36                 } 

37             } else { 

38                 System.out.println(tmp.getAbsolutePath()); 

39             } 

40         } 

41         return list; 

42     } 

43   

44       

45     //recursion 

46     public static ArrayList<File> listFiles(String strPath) { 

47         return refreshFileList(strPath); 

48     } 

49   

50     public static ArrayList<File> refreshFileList(String strPath) { 

51         ArrayList<File> filelist = new ArrayList<File>(); 

52         File dir = new File(strPath); 

53         File[] files = dir.listFiles(); 

54   

55         if (files == null) 

56             return null; 

57         for (int i = 0; i < files.length; i++) { 

58             if (files[i].isDirectory()) { 

59                 refreshFileList(files[i].getAbsolutePath()); 

60             } else { 

61                 if(files[i].getName().toLowerCase().endsWith("zip")) 

62                     filelist.add(files[i]); 

63             } 

64         } 

65         return filelist; 

66     } 

67 }
[代码] ZipUtils.java
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001 package com.once; 

002   

003 import java.io.*; 

004 import java.util.ArrayList; 

005 import java.util.Collection; 

006 import java.util.Enumeration; 

007 import java.util.zip.ZipEntry; 

008 import java.util.zip.ZipException; 

009 import java.util.zip.ZipFile; 

010 import java.util.zip.ZipOutputStream; 

011   

012 /** 

013  * Java utils 实现的Zip工具 

014  * 

015  * @author once 

016  */

017 public class ZipUtils { 

018     private static final int BUFF_SIZE = 1024 * 1024; // 1M Byte 

019   

020     /** 

021      * 批量压缩文件(夹) 

022      * 

023      * @param resFileList 要压缩的文件(夹)列表 

024      * @param zipFile 生成的压缩文件 

025      * @throws IOException 当压缩过程出错时抛出 

026      */

027     public static void zipFiles(Collection<File> resFileList, File zipFile) throws IOException { 

028         ZipOutputStream zipout = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream( 

029                 zipFile), BUFF_SIZE)); 

030         for (File resFile : resFileList) { 

031             zipFile(resFile, zipout, ""); 

032         } 

033         zipout.close(); 

034     } 

035   

036     /** 

037      * 批量压缩文件(夹) 

038      * 

039      * @param resFileList 要压缩的文件(夹)列表 

040      * @param zipFile 生成的压缩文件 

041      * @param comment 压缩文件的注释 

042      * @throws IOException 当压缩过程出错时抛出 

043      */

044     public static void zipFiles(Collection<File> resFileList, File zipFile, String comment) 

045             throws IOException { 

046         ZipOutputStream zipout = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream( 

047                 zipFile), BUFF_SIZE)); 

048         for (File resFile : resFileList) { 

049             zipFile(resFile, zipout, ""); 

050         } 

051         zipout.setComment(comment); 

052         zipout.close(); 

053     } 

054   

055     /** 

056      * 解压缩一个文件 

057      * 

058      * @param zipFile 压缩文件 

059      * @param folderPath 解压缩的目标目录 

060      * @throws IOException 当解压缩过程出错时抛出 

061      */

062     public static void upZipFile(File zipFile, String folderPath) throws ZipException, IOException { 

063         File desDir = new File(folderPath); 

064         if (!desDir.exists()) { 

065             desDir.mkdirs(); 

066         } 

067         ZipFile zf = new ZipFile(zipFile); 

068         for (Enumeration<?> entries = zf.entries(); entries.hasMoreElements();) { 

069             ZipEntry entry = ((ZipEntry)entries.nextElement()); 

070             InputStream in = zf.getInputStream(entry); 

071             String str = folderPath + File.separator + entry.getName(); 

072             str = new String(str.getBytes("8859_1"), "GB2312"); 

073             File desFile = new File(str); 

074             if (!desFile.exists()) { 

075                 File fileParentDir = desFile.getParentFile(); 

076                 if (!fileParentDir.exists()) { 

077                     fileParentDir.mkdirs(); 

078                 } 

079                 desFile.createNewFile(); 

080             } 

081             OutputStream out = new FileOutputStream(desFile); 

082             byte buffer[] = new byte[BUFF_SIZE]; 

083             int realLength; 

084             while ((realLength = in.read(buffer)) > 0) { 

085                 out.write(buffer, 0, realLength); 

086             } 

087             in.close(); 

088             out.close(); 

089         } 

090     } 

091   

092     /** 

093      * 解压文件名包含传入文字的文件 

094      * 

095      * @param zipFile 压缩文件 

096      * @param folderPath 目标文件夹 

097      * @param nameContains 传入的文件匹配名 

098      * @throws ZipException 压缩格式有误时抛出 

099      * @throws IOException IO错误时抛出 

100      */

101     public static ArrayList<File> upZipSelectedFile(File zipFile, String folderPath, 

102             String nameContains) throws ZipException, IOException { 

103         ArrayList<File> fileList = new ArrayList<File>(); 

104   

105         File desDir = new File(folderPath); 

106         if (!desDir.exists()) { 

107             desDir.mkdir(); 

108         } 

109   

110         ZipFile zf = new ZipFile(zipFile); 

111         for (Enumeration<?> entries = zf.entries(); entries.hasMoreElements();) { 

112             ZipEntry entry = ((ZipEntry)entries.nextElement()); 

113             if (entry.getName().contains(nameContains)) { 

114                 InputStream in = zf.getInputStream(entry); 

115                 String str = folderPath + File.separator + entry.getName(); 

116                 str = new String(str.getBytes("8859_1"), "GB2312"); 

117                 // str.getBytes("GB2312"),"8859_1" 输出 

118                 // str.getBytes("8859_1"),"GB2312" 输入 

119                 File desFile = new File(str); 

120                 if (!desFile.exists()) { 

121                     File fileParentDir = desFile.getParentFile(); 

122                     if (!fileParentDir.exists()) { 

123                         fileParentDir.mkdirs(); 

124                     } 

125                     desFile.createNewFile(); 

126                 } 

127                 OutputStream out = new FileOutputStream(desFile); 

128                 byte buffer[] = new byte[BUFF_SIZE]; 

129                 int realLength; 

130                 while ((realLength = in.read(buffer)) > 0) { 

131                     out.write(buffer, 0, realLength); 

132                 } 

133                 in.close(); 

134                 out.close(); 

135                 fileList.add(desFile); 

136             } 

137         } 

138         return fileList; 

139     } 

140   

141     /** 

142      * 获得压缩文件内文件列表 

143      * 

144      * @param zipFile 压缩文件 

145      * @return 压缩文件内文件名称 

146      * @throws ZipException 压缩文件格式有误时抛出 

147      * @throws IOException 当解压缩过程出错时抛出 

148      */

149     public static ArrayList<String> getEntriesNames(File zipFile) throws ZipException, IOException { 

150         ArrayList<String> entryNames = new ArrayList<String>(); 

151         Enumeration<?> entries = getEntriesEnumeration(zipFile); 

152         while (entries.hasMoreElements()) { 

153             ZipEntry entry = ((ZipEntry)entries.nextElement()); 

154             entryNames.add(new String(getEntryName(entry).getBytes("GB2312"), "8859_1")); 

155         } 

156         return entryNames; 

157     } 

158   

159     /** 

160      * 获得压缩文件内压缩文件对象以取得其属性 

161      * 

162      * @param zipFile 压缩文件 

163      * @return 返回一个压缩文件列表 

164      * @throws ZipException 压缩文件格式有误时抛出 

165      * @throws IOException IO操作有误时抛出 

166      */

167     public static Enumeration<?> getEntriesEnumeration(File zipFile) throws ZipException, 

168             IOException { 

169         ZipFile zf = new ZipFile(zipFile); 

170         return zf.entries(); 

171   

172     } 

173   

174     /** 

175      * 取得压缩文件对象的注释 

176      * 

177      * @param entry 压缩文件对象 

178      * @return 压缩文件对象的注释 

179      * @throws UnsupportedEncodingException 

180      */

181     public static String getEntryComment(ZipEntry entry) throws UnsupportedEncodingException { 

182         return new String(entry.getComment().getBytes("GB2312"), "8859_1"); 

183     } 

184   

185     /** 

186      * 取得压缩文件对象的名称 

187      * 

188      * @param entry 压缩文件对象 

189      * @return 压缩文件对象的名称 

190      * @throws UnsupportedEncodingException 

191      */

192     public static String getEntryName(ZipEntry entry) throws UnsupportedEncodingException { 

193         return new String(entry.getName().getBytes("GB2312"), "8859_1"); 

194     } 

195   

196     /** 

197      * 压缩文件 

198      * 

199      * @param resFile 需要压缩的文件(夹) 

200      * @param zipout 压缩的目的文件 

201      * @param rootpath 压缩的文件路径 

202      * @throws FileNotFoundException 找不到文件时抛出 

203      * @throws IOException 当压缩过程出错时抛出 

204      */

205     private static void zipFile(File resFile, ZipOutputStream zipout, String rootpath) 

206             throws FileNotFoundException, IOException { 

207         rootpath = rootpath + (rootpath.trim().length() == 0 ? "" : File.separator) 

208                 + resFile.getName(); 

209         rootpath = new String(rootpath.getBytes("8859_1"), "GB2312"); 

210         if (resFile.isDirectory()) { 

211             File[] fileList = resFile.listFiles(); 

212             for (File file : fileList) { 

213                 zipFile(file, zipout, rootpath); 

214             } 

215         } else { 

216             byte buffer[] = new byte[BUFF_SIZE]; 

217             BufferedInputStream in = new BufferedInputStream(new FileInputStream(resFile), 

218                     BUFF_SIZE); 

219             zipout.putNextEntry(new ZipEntry(rootpath)); 

220             int realLength; 

221             while ((realLength = in.read(buffer)) != -1) { 

222                 zipout.write(buffer, 0, realLength); 

223             } 

224             in.close(); 

225             zipout.flush(); 

226             zipout.closeEntry(); 

227         } 

228     } 

229 }
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