Android zip文件压缩解压缩

http://www.oschina.net/code/snippet_4873_4142

1. [代码]DirTraversal.java    

package com.once; 
 import java.io.File; import java.util.ArrayList; import java.util.LinkedList; /** 
 *  文件夹遍历 
 * @author once 
 * 
 */ public class DirTraversal { 
      
    //no recursion     public static LinkedList<File> listLinkedFiles(String strPath) { 
        LinkedList<File> list = new LinkedList<File>(); 
        File dir = new File(strPath); 
        File file[] = dir.listFiles(); 
        for (int i = 0; i < file.length; i++) { 
            if (file[i].isDirectory()) 
                list.add(file[i]); 
            else
                System.out.println(file[i].getAbsolutePath()); 
        } 
        File tmp; 
        while (!list.isEmpty()) { 
            tmp = (File) list.removeFirst(); 
            if (tmp.isDirectory()) { 
                file = tmp.listFiles(); 
                if (file == null) 
                    continue; 
                for (int i = 0; i < file.length; i++) { 
                    if (file[i].isDirectory()) 
                        list.add(file[i]); 
                    else
                        System.out.println(file[i].getAbsolutePath()); 
                } 
            } else { 
                System.out.println(tmp.getAbsolutePath()); 
            } 
        } 
        return list; 
    } 
  
      
    //recursion     public static ArrayList<File> listFiles(String strPath) { 
        return refreshFileList(strPath); 
    } 
  
    public static ArrayList<File> refreshFileList(String strPath) { 
        ArrayList<File> filelist = new ArrayList<File>(); 
        File dir = new File(strPath); 
        File[] files = dir.listFiles(); 
  
        if (files == null) 
            return null; 
        for (int i = 0; i < files.length; i++) { 
            if (files[i].isDirectory()) { 
                refreshFileList(files[i].getAbsolutePath()); 
            } else { 
                if(files[i].getName().toLowerCase().endsWith("zip")) 
                    filelist.add(files[i]); 
            } 
        } 
        return filelist; 
    } 
}

2. [代码]ZipUtils.java 

package com.once; 
 import java.io.*; import java.util.ArrayList; import java.util.Collection; import java.util.Enumeration; import java.util.zip.ZipEntry; import java.util.zip.ZipException; import java.util.zip.ZipFile; import java.util.zip.ZipOutputStream; 
 /** 
 * Java utils 实现的Zip工具 
 * 
 * @author once 
 */ public class ZipUtils { 
    private static final int BUFF_SIZE = 1024 * 1024; // 1M Byte 
    /** 
     * 批量压缩文件(夹) 
     * 
     * @param resFileList 要压缩的文件(夹)列表 
     * @param zipFile 生成的压缩文件 
     * @throws IOException 当压缩过程出错时抛出 
     */
    public static void zipFiles(Collection<File> resFileList, File zipFile) throws IOException { 
        ZipOutputStream zipout = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream( 
                zipFile), BUFF_SIZE)); 
        for (File resFile : resFileList) { 
            zipFile(resFile, zipout, ""); 
        } 
        zipout.close(); 
    } 
  
    /** 
     * 批量压缩文件(夹) 
     * 
     * @param resFileList 要压缩的文件(夹)列表 
     * @param zipFile 生成的压缩文件 
     * @param comment 压缩文件的注释 
     * @throws IOException 当压缩过程出错时抛出 
     */
    public static void zipFiles(Collection<File> resFileList, File zipFile, String comment) 
            throws IOException { 
        ZipOutputStream zipout = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream( 
                zipFile), BUFF_SIZE)); 
        for (File resFile : resFileList) { 
            zipFile(resFile, zipout, ""); 
        } 
        zipout.setComment(comment); 
        zipout.close(); 
    } 
  
    /** 
     * 解压缩一个文件 
     * 
     * @param zipFile 压缩文件 
     * @param folderPath 解压缩的目标目录 
     * @throws IOException 当解压缩过程出错时抛出 
     */
    public static void upZipFile(File zipFile, String folderPath) throws ZipException, IOException { 
        File desDir = new File(folderPath); 
        if (!desDir.exists()) { 
            desDir.mkdirs(); 
        } 
        ZipFile zf = new ZipFile(zipFile); 
        for (Enumeration<?> entries = zf.entries(); entries.hasMoreElements();) { 
            ZipEntry entry = ((ZipEntry)entries.nextElement()); 
            InputStream in = zf.getInputStream(entry); 
            String str = folderPath + File.separator + entry.getName(); 
            str = new String(str.getBytes("8859_1"), "GB2312"); 
            File desFile = new File(str); 
            if (!desFile.exists()) { 
                File fileParentDir = desFile.getParentFile(); 
                if (!fileParentDir.exists()) { 
                    fileParentDir.mkdirs(); 
                } 
                desFile.createNewFile(); 
            } 
            OutputStream out = new FileOutputStream(desFile); 
            byte buffer[] = new byte[BUFF_SIZE]; 
            int realLength; 
            while ((realLength = in.read(buffer)) > 0) { 
                out.write(buffer, 0, realLength); 
            } 
            in.close(); 
            out.close(); 
        } 
    } 
  
    /** 
     * 解压文件名包含传入文字的文件 
     * 
     * @param zipFile 压缩文件 
     * @param folderPath 目标文件夹 
     * @param nameContains 传入的文件匹配名 
     * @throws ZipException 压缩格式有误时抛出 
     * @throws IOException IO错误时抛出 
     */
    public static ArrayList<File> upZipSelectedFile(File zipFile, String folderPath, 
            String nameContains) throws ZipException, IOException { 
        ArrayList<File> fileList = new ArrayList<File>(); 
  
        File desDir = new File(folderPath); 
        if (!desDir.exists()) { 
            desDir.mkdir(); 
        } 
  
        ZipFile zf = new ZipFile(zipFile); 
        for (Enumeration<?> entries = zf.entries(); entries.hasMoreElements();) { 
            ZipEntry entry = ((ZipEntry)entries.nextElement()); 
            if (entry.getName().contains(nameContains)) { 
                InputStream in = zf.getInputStream(entry); 
                String str = folderPath + File.separator + entry.getName(); 
                str = new String(str.getBytes("8859_1"), "GB2312"); 
                // str.getBytes("GB2312"),"8859_1" 输出                 // str.getBytes("8859_1"),"GB2312" 输入                 File desFile = new File(str); 
                if (!desFile.exists()) { 
                    File fileParentDir = desFile.getParentFile(); 
                    if (!fileParentDir.exists()) { 
                        fileParentDir.mkdirs(); 
                    } 
                    desFile.createNewFile(); 
                } 
                OutputStream out = new FileOutputStream(desFile); 
                byte buffer[] = new byte[BUFF_SIZE]; 
                int realLength; 
                while ((realLength = in.read(buffer)) > 0) { 
                    out.write(buffer, 0, realLength); 
                } 
                in.close(); 
                out.close(); 
                fileList.add(desFile); 
            } 
        } 
        return fileList; 
    } 
  
    /** 
     * 获得压缩文件内文件列表 
     * 
     * @param zipFile 压缩文件 
     * @return 压缩文件内文件名称 
     * @throws ZipException 压缩文件格式有误时抛出 
     * @throws IOException 当解压缩过程出错时抛出 
     */
    public static ArrayList<String> getEntriesNames(File zipFile) throws ZipException, IOException { 
        ArrayList<String> entryNames = new ArrayList<String>(); 
        Enumeration<?> entries = getEntriesEnumeration(zipFile); 
        while (entries.hasMoreElements()) { 
            ZipEntry entry = ((ZipEntry)entries.nextElement()); 
            entryNames.add(new String(getEntryName(entry).getBytes("GB2312"), "8859_1")); 
        } 
        return entryNames; 
    } 
  
    /** 
     * 获得压缩文件内压缩文件对象以取得其属性 
     * 
     * @param zipFile 压缩文件 
     * @return 返回一个压缩文件列表 
     * @throws ZipException 压缩文件格式有误时抛出 
     * @throws IOException IO操作有误时抛出 
     */
    public static Enumeration<?> getEntriesEnumeration(File zipFile) throws ZipException, 
            IOException { 
        ZipFile zf = new ZipFile(zipFile); 
        return zf.entries(); 
  
    } 
  
    /** 
     * 取得压缩文件对象的注释 
     * 
     * @param entry 压缩文件对象 
     * @return 压缩文件对象的注释 
     * @throws UnsupportedEncodingException 
     */
    public static String getEntryComment(ZipEntry entry) throws UnsupportedEncodingException { 
        return new String(entry.getComment().getBytes("GB2312"), "8859_1"); 
    } 
  
    /** 
     * 取得压缩文件对象的名称 
     * 
     * @param entry 压缩文件对象 
     * @return 压缩文件对象的名称 
     * @throws UnsupportedEncodingException 
     */
    public static String getEntryName(ZipEntry entry) throws UnsupportedEncodingException { 
        return new String(entry.getName().getBytes("GB2312"), "8859_1"); 
    } 
  
    /** 
     * 压缩文件 
     * 
     * @param resFile 需要压缩的文件(夹) 
     * @param zipout 压缩的目的文件 
     * @param rootpath 压缩的文件路径 
     * @throws FileNotFoundException 找不到文件时抛出 
     * @throws IOException 当压缩过程出错时抛出 
     */
    private static void zipFile(File resFile, ZipOutputStream zipout, String rootpath) 
            throws FileNotFoundException, IOException { 
        rootpath = rootpath + (rootpath.trim().length() == 0 ? "" : File.separator) 
                + resFile.getName(); 
        rootpath = new String(rootpath.getBytes("8859_1"), "GB2312"); 
        if (resFile.isDirectory()) { 
            File[] fileList = resFile.listFiles(); 
            for (File file : fileList) { 
                zipFile(file, zipout, rootpath); 
            } 
        } else { 
            byte buffer[] = new byte[BUFF_SIZE]; 
            BufferedInputStream in = new BufferedInputStream(new FileInputStream(resFile), 
                    BUFF_SIZE); 
            zipout.putNextEntry(new ZipEntry(rootpath)); 
            int realLength; 
            while ((realLength = in.read(buffer)) != -1) { 
                zipout.write(buffer, 0, realLength); 
            } 
            in.close(); 
            zipout.flush(); 
            zipout.closeEntry(); 
        } 
    } 
}


 

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