package com.lf.server.helper;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import java.io.*;
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import java.util.Enumeration;
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import java.util.zip.ZipEntry;
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import java.util.zip.ZipFile;
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import java.util.zip.ZipOutputStream;
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/**
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* Zip帮助类
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* @author WWW
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*/
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public class ZipHelper {
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private final static int BUFFER_SIZE = 1024;
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private final static byte[] BUFFER = new byte[1024];
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private final static Log log = LogFactory.getLog(ZipHelper.class);
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/**
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* Zip解压
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*
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* @param filePath zip文件
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* @param zipDir 解压路径
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* @return 成功是/否
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*/
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public static boolean unzip(String filePath, String zipDir) {
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try {
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int count;
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ZipFile zipfile = new ZipFile(filePath);
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Enumeration e = zipfile.entries();
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while (e.hasMoreElements()) {
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ZipEntry entry = (ZipEntry) e.nextElement();
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if (entry.isDirectory()) {
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File f = new File(zipDir + File.separator + entry.getName());
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if (!f.exists()) {
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f.mkdirs();
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}
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continue;
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}
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BufferedInputStream is = new BufferedInputStream(zipfile.getInputStream(entry));
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FileOutputStream fos = new FileOutputStream(zipDir + File.separator + entry.getName());
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BufferedOutputStream dest = new BufferedOutputStream(fos, BUFFER_SIZE);
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while ((count = is.read(BUFFER, 0, BUFFER_SIZE)) != -1) {
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dest.write(BUFFER, 0, count);
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}
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dest.flush();
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dest.close();
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is.close();
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}
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return true;
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} catch (Exception ex) {
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log.error(ex.getMessage() + ex.getStackTrace() + "\n");
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return false;
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}
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}
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/**
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* Zip压缩
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*
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* @param zipFile zip源文件
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* @param sourceDir 源文件夹
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* @return 成功是/否
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*/
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public static boolean zip(String zipFile, String sourceDir) {
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ZipOutputStream zos = null;
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try {
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FileOutputStream fileOutputStream = new FileOutputStream(zipFile);
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zos = new ZipOutputStream(fileOutputStream);
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File sourceFile = new File(sourceDir);
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compress(sourceFile, zos, sourceFile.getName());
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return true;
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} catch (Exception ex) {
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log.error(ex.getMessage() + ex.getStackTrace() + "\n");
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return false;
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} finally {
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try {
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if (zos != null) {
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zos.close();
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}
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} catch (Exception e) {
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log.error(e.getMessage() + e.getStackTrace() + "\n");
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}
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}
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}
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/**
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* Zip压缩
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*
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* @param sourceFile zip源文件
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* @param zos zip输出流
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* @param name zip文件名称
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* @throws Exception
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*/
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public static void compress(File sourceFile, ZipOutputStream zos, String name) throws Exception {
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if (sourceFile.isFile()) {
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// 向zip输出流中添加一个zip实体，构造器中name为zip实体的文件的名字
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zos.putNextEntry(new ZipEntry(name));
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// copy文件到zip输出流中
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int len;
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FileInputStream in = new FileInputStream(sourceFile);
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while ((len = in.read(BUFFER)) != -1) {
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zos.write(BUFFER, 0, len);
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}
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zos.closeEntry();
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in.close();
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} else {
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File[] listFiles = sourceFile.listFiles();
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if (listFiles == null || listFiles.length == 0) {
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// 空文件夹的处理：没有文件，不需要文件的copy
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zos.putNextEntry(new ZipEntry(name + "/"));
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zos.closeEntry();
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} else {
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for (File file : listFiles) {
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compress(file, zos, name + "/" + file.getName());
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}
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}
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}
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}
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}
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