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壓縮/解壓縮zip包處理

package com.newegg.lab.util;

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.util.Enumeration;

import java.util.zip.ZipEntry;

import java.util.zip.ZipFile;

import java.util.zip.ZipOutputStream;

//使用apache的api不存在壓縮文件名亂碼問題（該jar包在ant中）

//import org.apache.tools.zip.ZipEntry;

//import org.apache.tools.zip.ZipFile;

//import org.apache.tools.zip.ZipOutputStream;

/** *//**

* 壓縮/解壓縮zip包處理類

* @author terry.b.li

* @date 2--2

public class ZipUtil {

/** *//**

* 壓縮

* @param zipFileName

* 壓縮產生的zip包文件名--帶路徑,如果為null或空則默認按文件名生產壓縮文件名

* @param relativePath

* 相對路徑，默認為空

* @param directory

* 文件或目錄的絕對路徑

* @throws FileNotFoundException

* @throws IOException

* @author terry.b.li

public static void zip(String zipFileName, String relativePath,

String directory) throws FileNotFoundException, IOException {

String fileName = zipFileName;

if (fileName == null || fileName.trim().equals("")) {

File temp = new File(directory);

if (temp.isDirectory()) {

fileName = directory + ".zip";

} else {

if (directory.indexOf(".") > 0) {

fileName = directory.substring(0, directory

.lastIndexOf("."))

+ "zip";

} else {

fileName = directory + ".zip";

}

ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(fileName));

try {

zip(zos, relativePath, directory);

} catch (IOException ex) {

throw ex;

} finally {

if (null != zos) {

zos.close();

}

/** *//**

* 壓縮

* @param zos

* 壓縮輸出流

* @param relativePath

* 相對路徑

* @param absolutPath

* 文件或文件夾絕對路徑

* @throws IOException

* @author terry.b.li

private static void zip(ZipOutputStream zos, String relativePath,

String absolutPath) throws IOException {

File file = new File(absolutPath);

if (file.isDirectory()) {

File[] files = file.listFiles();

for (int i = 0; i < files.length; i++) {

File tempFile = files[i];

if (tempFile.isDirectory()) {

String newRelativePath = relativePath + tempFile.getName()

+ File.separator;

createZipNode(zos, newRelativePath);

zip(zos, newRelativePath, tempFile.getPath());

} else {

zipFile(zos, tempFile, relativePath);

}

} else {

zipFile(zos, file, relativePath);

}

/** *//**

* 壓縮文件

* @param zos

* 壓縮輸出流

* @param file

* 文件對象

* @param relativePath

* 相對路徑

* @throws IOException

* @author terry.b.li

private static void zipFile(ZipOutputStream zos, File file,

String relativePath) throws IOException {

ZipEntry entry = new ZipEntry(relativePath + new String(file.getName().getBytes("ISO-8859-1")));

zos.putNextEntry(entry);

zos.setComment("this is zip file luckystar");

InputStream is = null;

try {

is = new FileInputStream(file);

int BUFFERSIZE = 2 <<10;

int length =0;

byte[] buffer = new byte[BUFFERSIZE];

while ((length = is.read(buffer, 0, BUFFERSIZE)) >= 0) {

zos.write(buffer, 0, length);

}

zos.flush();

zos.closeEntry();

} catch (IOException ex) {

throw ex;

} finally {

if (null != is) {

is.close();

}

/** *//**

* 創建目錄

* @param zos

* zip輸出流

* @param relativePath

* 相對路徑

* @throws IOException

* @author terry.b.li

private static void createZipNode(ZipOutputStream zos, String relativePath)

throws IOException {

ZipEntry zipEntry = new ZipEntry(relativePath);

zos.putNextEntry(zipEntry);

zos.closeEntry();

}

/** *//**

* 解壓縮zip包

* @param zipFilePath

* zip文件路徑

* @param targetPath

* 解壓縮到的位置，如果為null或空字符串則默認解壓縮到跟zip包同目錄跟zip包同名的文件夾下

* @throws IOException

* @author terry.b.li

public static void unzip(String zipFilePath, String targetPath)

throws IOException {

OutputStream os = null;

InputStream is = null;

ZipFile zipFile = null;

try {

zipFile = new ZipFile(zipFilePath);

String directoryPath = "";

if (null == targetPath || "".equals(targetPath)) {

directoryPath = zipFilePath.substring(0, zipFilePath

.lastIndexOf("."));

} else {

directoryPath = targetPath;

}

// Enumeration entryEnum = zipFile.getEntries();

Enumeration entryEnum = zipFile.entries();

if (null != entryEnum) {

ZipEntry zipEntry = null;

while (entryEnum.hasMoreElements()) {

zipEntry = (ZipEntry) entryEnum.nextElement();

if (zipEntry.isDirectory()) {

directoryPath = directoryPath + File.separator

+ zipEntry.getName();

System.out.println(directoryPath);

continue;

}

if (zipEntry.getSize() > 0) {

// 文件

File targetFile = FileUtil.buildFile(directoryPath

+ File.separator + zipEntry.getName(), false);

os = new BufferedOutputStream(new FileOutputStream(

targetFile));

is = zipFile.getInputStream(zipEntry);

byte[] buffer = new byte[406];

int readLen = 0;

while ((readLen = is.read(buffer, 0, 4096)) >= 0) {

os.write(buffer, 0, readLen);

}

os.flush();

os.close();

} else {

// 空目錄

FileUtil.buildFile(directoryPath + File.separator

+ zipEntry.getName(), true);

}

} catch (IOException ex) {

throw ex;

} finally {

if(null != zipFile){

zipFile = null;

}

if (null != is) {

is.close();

}

if (null != os) {

os.close();

}

public static void main(String[] args) {

try {

ZipUtil.zip("c:\\test.zip", "", "C:\\Documents and Settings\\Administrator\\桌面\\新建文件夾");

System.out.println("OK");

} catch (FileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

posted on 2008-12-07 11:03 禮物閱讀(753) 評論(0) 編輯收藏所屬分類: java

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