android 文件的压缩和解压

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();
}
}
}

更多相关文章

随机推荐