// RCFile读出来是数组,单独处理
key = new LongWritable();
BytesRefArrayWritable value = new BytesRefArrayWritable();
while (reader.next(key, value) && count < MAX_RECORD_TO_READ) {
StringBuffer sb = new StringBuffer();
textValue.clear();
for (int i = 0; i < value.size(); i++) {
BytesRefWritable v = value.get(i);
textValue.set(v.getData(), v.getStart(), v.getLength());
sb.append(textValue.toString());
if (i < value.size() - 1) {