压缩文档相关的工具类

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();
}
}
}