记录：c++生成json

1. 生成json数据

 Json::Value root;
 root["aaa"] = "aaaa";
 root["bbb"] = "bbbb";
 root["ccc"] = 3;
 root["ddd"] = 4;
 root["eeee"] = 5;
 cout << StringJsonValue(root) << endl;
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2. 生成json数组

Json::Value array;
Json::Value root;
root["aaa"] = "aaaa";
root["bbb"] = 2;
array.append(root);
cout << StringJsonValue(array) << endl;
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Json::Value array;
Json::Value root;
root["aaa"] = "aaaa";
root["bbb"] = 2;
array["list"].append(root);
cout << StringJsonValue(array) << endl;
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3. StringJsonValue

std::string StringJsonValue(Json::Value & root)
{
    Json::StreamWriterBuilder write_builder;
    return writeString(write_builder, root);
}
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