Android如何实现压缩和解压缩文件

废话不多说了,直接给大家贴java代码了,具体代码如下所示:

Java代码

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<File> 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<File> 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<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);

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<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(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();

}

}

}

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