ZIP操作

public String  prefixZip(Object obj) throws FrameException {
        String str = "";
        PrintWriter dataos = null;
        String strPath = ServerInfo.getDownloadPath();
        try
        {
            File file = null;
            file = new File(strPath);
            file.mkdirs();
            Date dd = new Date();
            long strD = dd.getTime();
            // rvo.setretVO(PREFIXFILE + String.valueOf(strD)+".zip");
            //创建文件名
            str = PREFIXFILE + String.valueOf(strD) + ".zip";
            StringBuffer strFullPath = new StringBuffer(strPath);
            strFullPath.append(System.getProperty("file.separator"));
            strFullPath.append(PREFIXFILE);
            strFullPath.append(String.valueOf(strD));
            strFullPath.append(".zip");
            file = new File(strFullPath.toString());
           
            TraceService.debug(LogConstants.DEPLOY,"获取压缩路径:" + strFullPath.toString());
           
            //读取文件
            ZipOutputStream zipos = new ZipOutputStream(new FileOutputStream(file));
            zipos.setMethod(ZipOutputStream.DEFLATED);
            zipos.putNextEntry(new ZipEntry("prefix.txt"));
            dataos = new PrintWriter(zipos);
           
            //开始处理Object，对object进行解析
            if (obj instanceof MiscPrefixVO)
            {
                TraceService.debug(LogConstants.DEPLOY, "压缩对象为MiscPrefixVO");
                dataos.print( sysCodeString(((MiscPrefixVO) obj).toString()));
            }
            else if (obj instanceof ArrayList)
            {
                int lLen = ( (ArrayList) obj).size();
                TraceService.debug(LogConstants.DEPLOY,"压缩对象为ArrayList ,长度为" + lLen);
                for (int i = 0; i < lLen; i++)
                {
                    MiscPrefixVO mVO = (MiscPrefixVO) ( (ArrayList) obj).get(i);
                    dataos.print(sysCodeString(mVO.toString()));
                    dataos.flush();
                }
            }
            dataos.close();
            dataos = null;
        }
        catch (FileNotFoundException fne) {
            if (dataos != null) {
                try {
                    dataos.close();
                }
                catch (Exception e) {
                }
                dataos = null;
            }
            throw new FrameException(OAMErrorCodeConst._EC_PREFIX_ZIP_FAIL,
                                     "压缩文件错误!" + fne.toString());
        }
        catch (IOException ioe) {
            if (dataos != null) {
                try {
                    dataos.close();
                }
                catch (Exception e) {
                }
                dataos = null;
            }
            throw new FrameException(OAMErrorCodeConst._EC_PREFIX_ZIP_FAIL,
                                     "生成压缩文件失败!" + ioe.toString());
        }
        return str;
    }