ZipUtil

package com.cango.erp.cdc.util;


import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipFile;
import org.apache.tools.zip.ZipOutputStream;

import java.io.*;
import java.util.Enumeration;

/**
 * @Auther: Administrator
 * @Date: 2019/2/19 19:49
 * @Description: 压缩/解压缩工具包
 */
public class ZipUtil {

    /**
     * 使用GBK编码可以避免压缩中文文件名乱码
     */
    private static final String CHINESE_CHARSET = "GBK";

    /**
     * 文件读取缓冲区大小
     */
    private static final int CACHE_SIZE = 1024;

    /**
     * <p>
     * 压缩文件
     * </p>
     *
     * @param sourceFolder 压缩文件夹
     * @param zipFilePath  压缩文件输出路径
     * @throws Exception
     */
    public static void zip(String sourceFolder, String zipFilePath) throws Exception {
        OutputStream out = new FileOutputStream(zipFilePath);
        BufferedOutputStream bos = new BufferedOutputStream(out);
        ZipOutputStream zos = new ZipOutputStream(bos);
        // 解决中文文件名乱码
        zos.setEncoding(CHINESE_CHARSET);
        File file = new File(sourceFolder);
        String basePath = null;
        if (file.isDirectory()) {
            basePath = file.getPath();
        } else {
            basePath = file.getParent();
        }
        zipFile(file, basePath, zos);
        zos.closeEntry();
        zos.close();
        bos.close();
        out.close();
    }

    /**
     * <p>
     * 递归压缩文件
     * </p>
     *
     * @param parentFile
     * @param basePath
     * @param zos
     * @throws Exception
     */
    private static void zipFile(File parentFile, String basePath, ZipOutputStream zos) throws Exception {
        File[] files = new File[0];
        if (parentFile.isDirectory()) {
            files = parentFile.listFiles();
        } else {
            files = new File[1];
            files[0] = parentFile;
        }
        String pathName;
        InputStream is;
        BufferedInputStream bis;
        byte[] cache = new byte[CACHE_SIZE];
        for (File file : files) {
            if (file.isDirectory()) {
                zipFile(file, basePath, zos);
            } else {
                pathName = file.getPath().substring(basePath.length() + 1);
                is = new FileInputStream(file);
                bis = new BufferedInputStream(is);
                zos.putNextEntry(new ZipEntry(pathName));
                int nRead = 0;
                while ((nRead = bis.read(cache, 0, CACHE_SIZE)) != -1) {
                    zos.write(cache, 0, nRead);
                }
                bis.close();
                is.close();
            }
        }
    }

    /**
     * <p>
     * 解压压缩包
     * </p>
     *
     * @param zipFilePath 压缩文件路径
     * @param destDir     压缩包释放目录
     * @throws Exception
     */
    public static void unZip(String zipFilePath, String destDir) throws Exception {
        ZipFile zipFile = new ZipFile(zipFilePath, CHINESE_CHARSET);
        Enumeration<?> emu = zipFile.getEntries();
        BufferedInputStream bis;
        FileOutputStream fos;
        BufferedOutputStream bos;
        File file, parentFile;
        ZipEntry entry;
        byte[] cache = new byte[CACHE_SIZE];
        while (emu.hasMoreElements()) {
            entry = (ZipEntry) emu.nextElement();
            if (entry.isDirectory()) {
                new File(destDir + entry.getName()).mkdirs();
                continue;
            }
            bis = new BufferedInputStream(zipFile.getInputStream(entry));
            file = new File(destDir.endsWith("\") ? destDir : (destDir + "\") + entry.getName());
            parentFile = file.getParentFile();
            if (parentFile != null && (!parentFile.exists())) {
                parentFile.mkdirs();
            }
            fos = new FileOutputStream(file);
            bos = new BufferedOutputStream(fos, CACHE_SIZE);
            int nRead = 0;
            while ((nRead = bis.read(cache, 0, CACHE_SIZE)) != -1) {
                fos.write(cache, 0, nRead);
            }
            bos.flush();
            bos.close();
            fos.close();
            bis.close();
        }
        zipFile.close();
    }

    /**
     * 解压Zip文件
     *
     * @param path 文件目录
     */
    public static void unZip(String path) {
        int count = -1;
        String savepath = "";

        File file = null;
        InputStream is = null;
        FileOutputStream fos = null;
        BufferedOutputStream bos = null;

        savepath = path.substring(0, path.lastIndexOf(".")) + File.separator; //保存解压文件目录
        new File(savepath).mkdir(); //创建保存目录
        ZipFile zipFile = null;
        try {
            zipFile = new ZipFile(path, "gbk"); //解决中文乱码问题
            Enumeration<?> entries = zipFile.getEntries();

            while (entries.hasMoreElements()) {
                byte buf[] = new byte[CACHE_SIZE];

                ZipEntry entry = (ZipEntry) entries.nextElement();

                String filename = entry.getName();
                boolean ismkdir = false;
                if (filename.lastIndexOf("/") != -1) { //检查此文件是否带有文件夹
                    ismkdir = true;
                }
                filename = savepath + filename;

                if (entry.isDirectory()) { //如果是文件夹先创建
                    file = new File(filename);
                    file.mkdirs();
                    continue;
                }
                file = new File(filename);
                if (!file.exists()) { //如果是目录先创建
                    if (ismkdir) {
                        new File(filename.substring(0, filename.lastIndexOf("/"))).mkdirs(); //目录先创建
                    }
                }
                file.createNewFile(); //创建文件

                is = zipFile.getInputStream(entry);
                fos = new FileOutputStream(file);
                bos = new BufferedOutputStream(fos, CACHE_SIZE);

                while ((count = is.read(buf)) > -1) {
                    bos.write(buf, 0, count);
                }
                bos.flush();
                bos.close();
                fos.close();

                is.close();
            }

            zipFile.close();

        } catch (IOException ioe) {
            ioe.printStackTrace();
        } finally {
            try {
                if (bos != null) {
                    bos.close();
                }
                if (fos != null) {
                    fos.close();
                }
                if (is != null) {
                    is.close();
                }
                if (zipFile != null) {
                    zipFile.close();
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    public static void main(String[] args) throws Exception {
        String f1 = "D:\work\工作资料\";
        String f2 = "D:\work\工作资料\11.zip";

        // unZip(f2, f1);

        unZip(f2);
    }
}