用apache的ant解压zip文件（中文文件或文件夹解决方法）

package upzip;  
  
import java.io.File;  
import java.io.FileOutputStream;  
import java.io.InputStream;  
import org.apache.tools.zip.*;  
import java.util.Enumeration;  
  
/** 
 * 压缩解压ZIP文件 
 * @author Administrator 
 * 
 */  
public class AntZip {  
    private ZipFile zipFile;  
    private static int bufSize;    //size of bytes  
    private byte[] buf;  
    private int readedBytes;  
      
    /** 
     *  
     * @param bufSize 缓存大小 
     */  
    public AntZip(int bufSize){  
        this.bufSize = bufSize;  
        this.buf = new byte[this.bufSize];  
    }  
      
    public AntZip(){  
        this(1024);  
    }  
      
    /** 
     * 生存目录 
     * @param directory 解压文件存放目录 
     * @param subDirectory 子目录（没有时可传入空字符串） 
     */  
    private 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 e){  
            e.printStackTrace();  
        }  
    }  
      
    /** 
     * 解压指定的ZIP文件 
     * @param unZipFileName 文件名字符串（包含路径） 
     * @param outputDirectory 解压后存放目录 
     */  
    public void unZip(String unZipFileName,String outputDirectory){  
        FileOutputStream fileOut;     
        //File file;     
        InputStream inputStream;  
          
        try{  
            createDirectory(outputDirectory,"");  
            if(System.getProperty("os.name").toLowerCase().indexOf("windows") >= 0){  
                this.zipFile = new ZipFile(unZipFileName,"GBK");  
            }else if(System.getProperty("os.name").toLowerCase().indexOf("linux") >= 0){  
                this.zipFile = new ZipFile(unZipFileName,"UTF-8");  
            }  
            for(Enumeration entries = this.zipFile.getEntries();entries.hasMoreElements();){  
                ZipEntry entry = (ZipEntry)entries.nextElement();  
                if(entry.isDirectory()){  
                    //是目录，则创建之  
                    String name = entry.getName().substring(0, entry.getName().length() - 1);  
                    File f = new File(outputDirectory + File.separator + name);  
                    f.mkdir();  
                    //file.mkdirs();  
                }else{  
                    //是文件  
                    String fileName = entry.getName().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 + entry.getName());  
                    f.createNewFile();  
                    inputStream = zipFile.getInputStream(entry);  
                    fileOut = new FileOutputStream(f);  
                    while(( this.readedBytes = inputStream.read(this.buf) ) > 0){  
                        fileOut.write(this.buf , 0 , this.readedBytes );  
                    }  
                    fileOut.close();  
                    inputStream.close();  
                }  
            }  
            this.zipFile.close();  
        }catch(Exception e){  
            e.printStackTrace();  
        }  
    }  
      
    /** 
     * 解压指定ZIP文件 
     * @param unZipFile 需要解压的ZIP文件 
     */  
    public void unZip(File unZipFile){  
        String outputDirectory = new String("D:/ip/"); //解压后存放目录  
         unZip(unZipFile.toString(),outputDirectory);  
    }  
}

if(System.getProperty("os.name").toLowerCase().indexOf("windows") >= 0){  
    this.zipFile = new ZipFile(unZipFileName,"GBK");  
}else if(System.getProperty("os.name").toLowerCase().indexOf("linux") >= 0){  
    this.zipFile = new ZipFile(unZipFileName,"UTF-8");  
}