Android如何实现压缩和解压缩文件

 package com.maidong.utils; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.io.UnsupportedEncodingException; 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; import org.apache.http.protocol.HTTP; 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 resFileList, File zipFile) throws IOException { ZipOutputStream zipout = null; try { zipout = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream(zipFile), BUFF_SIZE)); for (File resFile : resFileList) { zipFile(resFile, zipout, ""); } } finally { if (zipout != null) 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 resFileList, File zipFile, String comment) throws IOException { ZipOutputStream zipout = null; try { zipout = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream(zipFile), BUFF_SIZE)); for (File resFile : resFileList) { zipFile(resFile, zipout, ""); } zipout.setComment(comment); } finally { if (zipout != null) 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); InputStream in = null; OutputStream out = null; try { for (Enumeration entries = zf.entries(); entries.hasMoreElements();) { ZipEntry entry = ((ZipEntry) entries.nextElement()); in = zf.getInputStream(entry); String str = folderPath + File.separator + entry.getName(); str = new String(str.getBytes("8859_1"), HTTP.UTF_8); File desFile = new File(str); if (!desFile.exists()) { File fileParentDir = desFile.getParentFile(); if (!fileParentDir.exists()) { fileParentDir.mkdirs(); } desFile.createNewFile(); } out = new FileOutputStream(desFile); byte buffer[] = new byte[BUFF_SIZE]; int realLength; while ((realLength = in.read(buffer)) > 0) { out.write(buffer, 0, realLength); } } } finally { if (in != null) in.close(); if (out != null) 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 upZipSelectedFile(File zipFile, String folderPath, String nameContains) throws ZipException, IOException { ArrayList fileList = new ArrayList(); File desDir = new File(folderPath); if (!desDir.exists()) { desDir.mkdir(); } ZipFile zf = new ZipFile(zipFile); InputStream in = null; OutputStream out = null; try { for (Enumeration entries = zf.entries(); entries.hasMoreElements();) { ZipEntry entry = ((ZipEntry) entries.nextElement()); if (entry.getName().contains(nameContains)) { in = zf.getInputStream(entry); String str = folderPath + File.separator + entry.getName(); str = new String(str.getBytes("8859_1"), HTTP.UTF_8); // str.getBytes(AppConstans.UTF_8),"8859_1" 输出 // str.getBytes("8859_1"),AppConstans.UTF_8 输入 File desFile = new File(str); if (!desFile.exists()) { File fileParentDir = desFile.getParentFile(); if (!fileParentDir.exists()) { fileParentDir.mkdirs(); } desFile.createNewFile(); } out = new FileOutputStream(desFile); byte buffer[] = new byte[BUFF_SIZE]; int realLength; while ((realLength = in.read(buffer)) > 0) { out.write(buffer, 0, realLength); } fileList.add(desFile); } } } finally { if (in != null) in.close(); if (out != null) out.close(); } 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 getEntriesNames(File zipFile) throws ZipException, IOException { ArrayList entryNames = new ArrayList(); Enumeration entries = getEntriesEnumeration(zipFile); while (entries.hasMoreElements()) { ZipEntry entry = ((ZipEntry) entries.nextElement()); entryNames.add(new String(getEntryName(entry).getBytes(HTTP.UTF_8), "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(HTTP.UTF_8), "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(HTTP.UTF_8), "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"), HTTP.UTF_8); BufferedInputStream in = null; try { if (resFile.isDirectory()) { File[] fileList = resFile.listFiles(); for (File file : fileList) { zipFile(file, zipout, rootpath); } } else { byte buffer[] = new byte[BUFF_SIZE]; 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(); } } finally { if (in != null) in.close(); // if (zipout != null); // zipout.close(); } } }