package com.opslab.util;

import java.io.*;

import java.util.zip.ZipEntry;

import java.util.zip.ZipFile;

import java.util.zip.ZipInputStream;

import java.util.zip.ZipOutputStream;

/**

* 压缩文档相关的工具类

*/

public final class ZIPUtil {

/**

* 文档压缩

*

* @param file 需要压缩的文件或目录

* @param dest 压缩后的文件名称

* @throws Exception

*/

public final static void deCompress(File file, String dest) throws Exception {

try (ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(dest))) {

zipFile(file, zos, "");

} catch (IOException e) {

e.printStackTrace();

}

}

public final static void zipFile(File inFile, ZipOutputStream zos, String dir) throws IOException {

if (inFile.isDirectory()) {

File[] files = inFile.listFiles();

if (CheckUtil.valid(files)) {

for (File file : files) {

String name = inFile.getName();

if (!"".equals(dir)) {

name = dir + "/" + name;

}

zipFile(file, zos, name);

}

}

} else {

String entryName = null;

if (!"".equals(dir)) {

entryName = dir + "/" + inFile.getName();

} else {

entryName = inFile.getName();

}

ZipEntry entry = new ZipEntry(entryName);

zos.putNextEntry(entry);

try (InputStream is = new FileInputStream(inFile)) {

int len = 0;

while ((len = is.read()) != -1) {

zos.write(len);

}

} catch (IOException e) {

e.printStackTrace();

}

}

}

/**

* 文档解压

*

* @param source 需要解压缩的文档名称

* @param path 需要解压缩的路径

*/

public final static void unCompress(File source, String path) throws IOException {

ZipEntry zipEntry = null;

FileUtil.createPaths(path);

//实例化ZipFile，每一个zip压缩文件都可以表示为一个ZipFile

//实例化一个Zip压缩文件的ZipInputStream对象，可以利用该类的getNextEntry()方法依次拿到每一个ZipEntry对象

try (

ZipFile zipFile = new ZipFile(source);

ZipInputStream zipInputStream = new ZipInputStream(new FileInputStream(source))

) {

while ((zipEntry = zipInputStream.getNextEntry()) != null) {

String fileName = zipEntry.getName();

File temp = new File(path + "/" + fileName);

if (!temp.getParentFile().exists()) {

temp.getParentFile().mkdirs();

}

try (OutputStream os = new FileOutputStream(temp);

//通过ZipFile的getInputStream方法拿到具体的ZipEntry的输入流

InputStream is = zipFile.getInputStream(zipEntry)) {

int len = 0;

while ((len = is.read()) != -1) {

os.write(len);

}

}

}

} catch (IOException e) {

e.printStackTrace();

}

}

}