data=record.getString(dbColNames[j]);

if (data == null || data.equalsIgnoreCase("null") || data.equalsIgnoreCase("")
    data = "N/A";
dataCell= new PdfPCell(new Phrase(8, new Chunk(data, dataFont)));
dataCell.setBackgroundColor(color);
pdfTable.addCell(dataCell);


{
    "5mintime_org": "2014-10-20",
    "rrank": "2",
    "maxutq_org": "47.73",
    "avgutq_org": "7.92",
    "username_org": "صارف",
    "username": "صارف",
    "5mintime": "2014-10-20",
    "rrank_org": "2",
    "maxutq": "47.73",
    "avgutq": "7.92"
},
{
    "5mintime_org": "2014-10-16",
    "rrank": "3",
    "maxutq_org": "43.75",
    "avgutq_org": "6.32",
    "username_org": "用户",
    "username": "用户",
    "5mintime": "2014-10-16",
    "rrank_org": "3",
    "maxutq": "43.75",
    "avgutq": "6.32"
},