Json是一种数据传输协议，规定了数据格式。

{"key":"value","key1":"value1"}

读取Json字符串(include <json.h>

Json::Value value;	Json::Reader reader;	Json::Value::iterator iter;	Json::Value::Members members;	bool parsingSuccessful = reader.parse( json_str, value );	if (parsingSuccessful) {	  members = value.getMemberNames();	  for (Json::Value::Members::iterator it = members.begin();	    it != members.end(); ++it) {	    std::string name = *it;	    std::string value_str = value[name].asString();	    cout<
    
     <<":"<
     
      <