How to use json-spirit to read json string in C++? I read the demo code. I find that:
const Address addrs[5] = { { 42, "East Street", "Newtown", "Essex", "England" },
{ 1, "West Street", "Hull", "Yorkshire", "England" },
{ 12, "South Road", "Aberystwyth", "Dyfed", "Wales" },
{ 45, "North Road", "Paignton", "Devon", "England" },
{ 78, "Upper Street", "Ware", "Hertfordshire", "England" } };
Can I convert a String into a json object?
char* jsonStr = "{'name', 'Tom'}";
json_spirit provides bool read_string( const String_type& s, Value_type& value )
and bool read( const std::string& s, Value& value )
to read json data from strings.
Here is an example:
string name;
string jsonStr("{\"name\":\"Tom\"}");
json_spirit::Value val;
auto success = json_spirit::read_string(jsonStr, val);
if (success) {
auto jsonObject = val.get_obj();
for (auto entry : jsonObject) {
if (entry.name_ == "name" && entry.value_.type() == json_spirit::Value_type::str_type) {
name = entry.value_.get_str();
break;
}
}
}
You could also use ifstream instead of string to read from json from file.
Please note, according to RFC4627 a string begins and ends with quotation marks.