Example - Using Jackson Libraries to Iterate Through Rows and Get Values
JsonNode node = loginEnv.getObjectMapper().readTree(response);
JsonNode array = node.path("fs_DATABROWSE_F0101").path("data").path("gridData").path("rowset");
for (Iterator<JsonNode> rows = array.iterator(); rows.hasNext();)
{
JsonNode aRow = rows.next();
System.out.println("Name: " +aRow.get("F0101_ALPH"));
}