import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;

import java.util.Enumeration;
import java.util.zip.CRC32;
import java.util.zip.CheckedOutputStream;

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

public class ZipUtil {

    public static final String FILE_SEPARATOR = System
    .getProperty("file.separator");

    /**
     * 将指定的文件解压缩到指定的文件夹，解压后的文件夹目录和给定的压缩文件名相同.
     *
     * @param zipFilePath
     *            全路径
     * @param unZipDirectory
     *            全路径
     * @return 解压缩文件是否成功.
     * @throws IOException
     */
    public static boolean unZipFile(String zipFilePath, String unZipDirectory)
            throws IOException {
        ZipFile zipFile = new ZipFile(zipFilePath);
        Enumeration<?> entries = zipFile.getEntries();
        if (zipFile == null) {
            return false;
        }
        while (entries.hasMoreElements()) {
            ZipEntry zipEntry = (ZipEntry) entries.nextElement();
            File f = new File(unZipDirectory + FILE_SEPARATOR
                    + zipEntry.getName());
            if (zipEntry.isDirectory())
            {
                if (!f.exists() && !f.mkdirs())
                    throw new IOException("Couldn't create directory: " + f);
            } else {
                BufferedInputStream is = null;
                BufferedOutputStream os = null;
                try {
                    is = new BufferedInputStream(zipFile
                            .getInputStream(zipEntry));
                    File destDir = f.getParentFile();
                    if (!destDir.exists() && !destDir.mkdirs()) {
                        throw new IOException("Couldn't create dir " + destDir);
                    }
                    os = new BufferedOutputStream(new FileOutputStream(f));
                    int b = -1;
                    while ((b = is.read()) != -1) {
                        os.write(b);
                    }
                } finally {
                    if (is != null)
                        is.close();
                    if (os != null)
                        os.close();
                }
            }
        }
        zipFile.close();
        return true;
    }

    /**
     *  压缩一个文件
     * @param filePath
     * @param zipPath
     * @return
     */
    public static boolean zipFile(String filePath,String zipPath){
        BufferedReader in=null;
        org.apache.tools.zip.ZipOutputStream out=null;
        try{
            File file=new File(filePath);
             in=new BufferedReader(new InputStreamReader(new FileInputStream(filePath),"ISO-8859-1"));
             FileOutputStream f=new FileOutputStream(zipPath);
             CheckedOutputStream ch=new CheckedOutputStream(f,new CRC32());
             out=new org.apache.tools.zip.ZipOutputStream(new BufferedOutputStream(ch));

            int c;
            out.putNextEntry(new org.apache.tools.zip.ZipEntry(file.getName()));
            while((c=in.read())!=-1)
                out.write(c);
            }

         catch(Exception e){
             e.printStackTrace();
             return false;
            }
         finally{
             try {
                 if(in!=null) in.close();
                 if(out!=null)  out.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
         }
         return true;
    }

    /**
     * 压缩一个目录
     * @param dir
     * @param zipPath
     * @return
     */
    public static boolean zipDirectory(String dir,String zipPath ){
        org.apache.tools.zip.ZipOutputStream out=null;
            try{
                File dirFile=new File(dir);
                if(!dirFile.isDirectory())return false;
                FileOutputStream fo=new FileOutputStream(zipPath);
                CheckedOutputStream ch=new CheckedOutputStream(fo,new CRC32());
                out=new org.apache.tools.zip.ZipOutputStream(new BufferedOutputStream(ch));
                zip(out,dirFile,"");

            }
             catch(Exception e){
                 e.printStackTrace();
                 return false;
                }
             finally{
                 try {
                     if(out!=null)  out.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
             }
             return true;
    }

    public static void zip(org.apache.tools.zip.ZipOutputStream out,File f,String base)throws Exception{
//      System.out.println("Zipping  "+f.getName());
        if (f.isDirectory()) {
            File[] fl=f.listFiles();
            out.putNextEntry(new org.apache.tools.zip.ZipEntry(base+"/"));
            base=base.length()==0?"":base+"/";
            for (int i=0;i<fl.length ;i++ ) {
                zip(out,fl[i],base+fl[i].getName());
            }
        }
        else {
            out.putNextEntry(new org.apache.tools.zip.ZipEntry(base));
            FileInputStream is=new FileInputStream(f);
            BufferedInputStream in = new BufferedInputStream(is);//修改BUG!二进制输出采用buffered
            int b;
            while ((b=in.read()) != -1)
                out.write(b);
            in.close();
        }

    }

     public static void main(String[] args){
       //  boolean f=zipFile("e:/red100.txt","e:/red.zip");
         //boolean f=zipDirectory("e:/red","e:/red2.zip");
         try {
        unZipFile("D:\\portal_rtb.zip", "D:\\wzb");
            //zipDirectory("F:\\list","F:\\list.zip");
        } catch (Exception e) {
            e.printStackTrace();
        }

     }

}