C++ 用PHP解析JSON数组输出

我有一个PHP返回的JSON数组，PHP的输出示例：

[
  {
    "uid": "1",
    "username": "mike",
    "time_created": "2014-12-27 15:30:03",
    "time_updated": "2014-12-27 15:30:03",
    "time_expires": "2014-12-27 15:30:03"
  },
  {
    "uid": "2",
    "username": "jason",
    "time_created": "2014-12-27 15:31:41",
    "time_updated": "2014-12-27 15:31:41",
    "time_expires": "2014-12-27 15:31:41"
  },
  {
    "uid": "3",
    "username": "david",
    "time_created": "2014-12-27 18:10:53",
    "time_updated": "2014-12-27 18:10:53",
    "time_expires": "2014-12-27 18:10:53"
  }
]

我尝试了几种方法，我尝试了迭代器，我尝试了从JSonObject数组，但似乎没有任何效果！ 到目前为止，我有以下示例代码：

QJsonDocument jsonResponse = QJsonDocument::fromJson(JData.toUtf8());
QJsonObject jsonObject = jsonResponse.object();
for (QJsonObject:: Iterator it = jsonObject.begin(); it != jsonObject.end(); ++it) {
QJsonArray array= (*it).toArray();
foreach (const QJsonValue & v, array)
qDebug() << v.toString();

QJsonDocument-jsonResponse=QJsonDocument:：fromJson（JData.toUtf8（））；
QJsonObject jsonObject=jsonResponse.object（）；
对于（QJsonObject:：迭代器it=jsonObject.begin（）；it！=jsonObject.end（）；++it）{
QJsonArray数组=（*it）.toArray（）；
foreach（常量QJsonValue&v，数组）
qDebug（）刚刚通过先将数据放入QString验证了您的代码（并不意味着需要这样做，只是为了我的调试）。发现了几个问题：

数组位于文档的上层
QJsonValue:：toString（）无法遍历嵌套结构，但QJsonValue
（变量v）仍然可以通过qDebug（）流打印

QString JsonStr=
"["
"{"
“uid\：\“1\”
“\”用户名\“：\”迈克\“，”
“创建时间”：“2014-12-27 15:30:03”
““更新时间”：“2014-12-27 15:30:03”
““到期时间”：“2014-12-27 15:30:03”
"},"
"{"
“uid\：\“2\”
“\”用户名\“：\”杰森\“，”
“创建时间”：“2014-12-27 15:31:41”
““更新时间”：“2014-12-27 15:31:41”
““到期时间”：“2014-12-27 15:31:41”
"},"
"{"
“uid\：\“3\”
“\”用户名\“：\”大卫\“
“创建时间”：“2014-12-27 18:10:53”
““更新时间”：“2014-12-27 18:10:53”
““到期时间”：“2014-12-27 18:10:53”
"}"
"]";
QJsonDocument jsonResponse=QJsonDocument:：fromJson（JsonStr.toUtf8（））；
QJsonArray数组=jsonResponse.array（）；
//印刷品
foreach（常量QJsonValue&v，数组）
{
qDebug（）你所说的“似乎什么都不管用”是什么意思？你发布的代码是否没有达到你的预期，是否编译失败，等等？它是如何不管用的？问题的具体原因是什么？
QString JsonStr =
"["
  "{"
    "\"uid\": \"1\","
    "\"username\": \"mike\","
    "\"time_created\": \"2014-12-27 15:30:03\","
    "\"time_updated\": \"2014-12-27 15:30:03\","
    "\"time_expires\": \"2014-12-27 15:30:03\""
  "},"
  "{"
    "\"uid\": \"2\","
    "\"username\": \"jason\","
    "\"time_created\": \"2014-12-27 15:31:41\","
    "\"time_updated\": \"2014-12-27 15:31:41\","
    "\"time_expires\": \"2014-12-27 15:31:41\""
  "},"
  "{"
    "\"uid\": \"3\","
    "\"username\": \"david\","
    "\"time_created\": \"2014-12-27 18:10:53\","
    "\"time_updated\": \"2014-12-27 18:10:53\","
    "\"time_expires\": \"2014-12-27 18:10:53\""
  "}"
"]";

QJsonDocument jsonResponse = QJsonDocument::fromJson(JsonStr.toUtf8());
QJsonArray array = jsonResponse.array();
// print
foreach (const QJsonValue & v, array)
{
    qDebug() << v;
}

// or parse
foreach (const QJsonValue& v, array)
{
    QJsonObject o = v.toObject();
    qDebug() << o["username"];
    qDebug() << o["time_expires"];
}