使用Apache的 ant.jar包进行解压缩

 依赖于Apache的ant.jar包

package com.chinaoly.job.utils;

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

import org.apache.commons.io.FilenameUtils;
import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipFile;
import org.apache.tools.zip.ZipOutputStream;
public class ZipUtils {
	
	private ZipUtils(){
    }
    
    public static void doCompress(String srcFile, String zipFile) throws IOException {
        doCompress(new File(srcFile), new File(zipFile));
    }
    
    /**
     * 文件压缩
     * @param srcFile 目录或者单个文件
     * @param zipFile 压缩后的ZIP文件
     */
    public static void doCompress(File srcFile, File zipFile) throws IOException {
        ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFile));
        try {
            doCompressDir(srcFile, out);
        } catch (IOException e) {
            throw e;
        } finally {
            out.close();//记得关闭资源
        }
    }
    
    public static void doCompressDir(File dirFile, ZipOutputStream out) throws IOException {
        if( dirFile.isDirectory() ){
            File[] files = dirFile.listFiles();
            for(File file : files){
                doCompressDir(file, out);
            }
        }else {
            doCompress(dirFile, out);
        }
    }
    
    public static void doCompress(String pathname, ZipOutputStream out) throws IOException{
        doCompress(new File(pathname), out);
    }
    
    /**
     * 压缩单个文件
     * @param file
     * @param out
     * @throws IOException
     */
    public static void doCompress(File file, ZipOutputStream out) throws IOException{
        byte[] buffer = new byte[1024];
        FileInputStream fis = new FileInputStream(file);
        out.putNextEntry(new ZipEntry(file.getName()));
        int len = 0 ;
        // 读取文件的内容, 打包到zip文件
        while ((len = fis.read(buffer)) > 0) {
            out.write(buffer, 0, len);
            out.flush();
        }
        out.closeEntry();
        fis.close();
    }

    //  以下是解压zip文件
    private static void createDirectory(String directory, String subDirectory) {
        String dir[];
        File fl = new File(directory);
        try {
            if (subDirectory == "" && fl.exists() != true)
                fl.mkdir();
            else if (subDirectory != "") {
                dir = subDirectory.replace('\\', '/').split("/");
                for (int i = 0; i < dir.length; i++) {
                    File subFile = new File(directory + File.separator + dir[i]);
                    if (subFile.exists() == false)
                        subFile.mkdir();
                    directory += File.separator + dir[i];
                }
            }
        }
        catch (Exception ex) {
            System.out.println(ex.getMessage());
        }
    }

    public static void unZip(String zipFileName, String outputDirectory) throws Exception {
        try {
            ZipFile zipFile = new ZipFile(zipFileName);
            Enumeration e = zipFile.getEntries();
            ZipEntry zipEntry = null;
            createDirectory(outputDirectory, "");
            while (e.hasMoreElements()) {
                zipEntry = (ZipEntry) e.nextElement();
                if (zipEntry.isDirectory()) {
                    //String name = zipEntry.getName();
                    //name = name.substring(0, name.length() - 1);
                    //File f = new File(outputDirectory + File.separator + name);
                    //f.mkdir();
                    //System.out.println("创建目录：" + outputDirectory + File.separator + name);
                }
                else {
                    String fileName = zipEntry.getName();
                    fileName = fileName.replace('\\', '/');
                    if (fileName.indexOf("/") != -1)
                    {
                      /*  createDirectory(outputDirectory,
                                fileName.substring(0, fileName.lastIndexOf("/")));*/
                        fileName=fileName.substring(fileName.lastIndexOf("/")+1,fileName.length());
                    }

                    //File f = new File(outputDirectory + File.separator + zipEntry.getName());
                    File f = new File(outputDirectory + File.separator + fileName);

                    f.createNewFile();
                    InputStream in = zipFile.getInputStream(zipEntry);
                    FileOutputStream out=new FileOutputStream(f);

                    byte[] by = new byte[1024];
                    int c;
                    while ( (c = in.read(by)) != -1) {
                        out.write(by, 0, c);
                    }
                    out.close();
                    in.close();
                }
            }
        }
        catch (Exception ex) {
            System.out.println(ex.getMessage());
        }
    }

}