Android zip文件压缩解压缩

 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 listLinkedFiles(String strPath) {

LinkedList list = new LinkedList();

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 listFiles(String strPath) {

return refreshFileList(strPath);

}

public static ArrayList refreshFileList(String strPath) {

ArrayList filelist = new ArrayList();

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 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 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) {[!--empirenews.page--]

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 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);

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 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("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;

[!--empirenews.page--]

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

zipout.write(buffer, 0, realLength);

}

in.close();

zipout.flush();

zipout.closeEntry();

}

}

}