Android zip文件紧缩解紧缩

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 完成的Zip东西

*

* @author once

*/

public class ZipUtils {

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

/**

* 批量紧缩文件(夹)

*

* @param resFileList 要紧缩的文件(夹)列表

* @param zipFile 生成的紧缩文件

* @throws IOException 当紧缩进程犯错时抛出

*/

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();

}

/**

* 批量紧缩文件(夹)

*

* @param resFileList 要紧缩的文件(夹)列表

* @param zipFile 生成的紧缩文件

* @param comment 紧缩文件的注释

* @throws IOException 当紧缩进程犯错时抛出

*/

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();

}

/**

* 解紧缩一个文件

*

* @param zipFile 紧缩文件

* @param folderPath 解紧缩的方针目录

* @throws IOException 当解紧缩进程犯错时抛出

*/

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) {