java zip解压中文乱码问题

这段代码可以解决中文zip和zip包中的文件也是中文的问题


import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import org.apache.tools.zip.ZipFile;

public class unzipandrar {

      /**  
     * 解压zip格式的压缩文件到指定位置  
     * @param zipFileName 压缩文件  
     * @param extPlace 解压目录  
     * @throws Exception  
     */  
    @SuppressWarnings("unchecked")   
    public synchronized void unzip(String zipFileName, String extPlace){   
        try {   
            (new File(extPlace)).mkdirs();   
            File f = new File(zipFileName);   
            ZipFile zipFile = new ZipFile(zipFileName);   
            if((!f.exists()) && (f.length() <= 0)) {   
                throw new Exception("要解压的文件不存在!");   
            }   
            String strPath, gbkPath, strtemp;   
            File tempFile = new File(extPlace);   
            strPath = tempFile.getAbsolutePath();   
            java.util.Enumeration e = zipFile.getEntries();
            while(e.hasMoreElements()){   
                org.apache.tools.zip.ZipEntry zipEnt = (org.apache.tools.zip.ZipEntry)e.nextElement();
                gbkPath=zipEnt.getName();   
                if(zipEnt.isDirectory()){   
                    strtemp = strPath + File.separator + gbkPath;   
                    File dir = new File(strtemp);   
                    dir.mkdirs();   
                    continue;   
                } else {   
                    //读写文件   
                    InputStream is = zipFile.getInputStream(zipEnt);   
                    BufferedInputStream bis = new BufferedInputStream(is);   
                    gbkPath=zipEnt.getName();   
                    strtemp = strPath + File.separator + gbkPath;   
                   
                    //建目录   
                    String strsubdir = gbkPath;   
                    for(int i = 0; i < strsubdir.length(); i++) {   
                        if(strsubdir.substring(i, i + 1).equalsIgnoreCase("/")) {   
                            String temp = strPath + File.separator + strsubdir.substring(0, i);   
                            File subdir = new File(temp);   
                            if(!subdir.exists())   
                            subdir.mkdir();   
                        }   
                    }   
                    FileOutputStream fos = new FileOutputStream(strtemp);   
                    BufferedOutputStream bos = new BufferedOutputStream(fos);   
                    int c;   
                    while((c = bis.read()) != -1) {   
                        bos.write((byte) c);   
                    }   
                    bos.close();   
                    fos.close();   
                }   
            }   
        } catch(Exception e) {   
            e.printStackTrace();   
            try {
                throw e;
            } catch (Exception e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            }   
        }   
    }