从json数组中检索少一个元素

Question

我有以下php代码来检索数据库表中的所有行。但是，一旦我在Java中检索行，它将返回一个小于元素总数的行。这是php代码：

$con = mysql_connect("localhost", "username", "password");
mysql_select_db("Database", $con);
$query  = "SELECT * FROM Table";

$result = mysql_query($query);
$output = array();

while($row = mysql_fetch_array($result))
{
    $output[]=$row;
} 

print(json_encode($output));

mysql_close($con);

该表包含以下元素

id   user_id
1    user1
2    user2
3    user3
4    user4
5    user5
6    user6

在下面的java代码中，我只回溯了5个元素，而不是6个。是否有一些我缺少的基本内容？

httpResponse = httpClient.execute(httpGet);
HttpEntity httpEntity = httpResponse.getEntity();
String js;
String userName = null;

try {

InputStream responseData;
responseData = httpEntity.getContent();
js = convertStreamToString(responseData);
Log.v(LOG_TAG, js);
jArray = new JSONArray(js);
JSONObject json_data = null;
Log.v("CompareActivity", "js is " + js);
Log.v(LOG_TAG, "Arraysize: " + jArray.length());    

    ... }