1 #include 
     
       2 #include 
      
        3 #include 
       
         4 using namespace std; 5  6 int main(){ 7     Json::Value root; 8     Json::FastWriter writer; 9 10     int a  = 123;11     int b  = 456;12     int c = 5858;13     int d = 4;14 15 16     root["mprotocolType"] = a;17     root["dstdeviceID"] =  b;18     root["mprotocolID"] =  c;19     root["mver"] = d;20 21    string receiveDataToRedis = writer.write(root);22 23     cout << "data:  " << receiveDataToRedis << endl;24 25 26     return 0;27 28 }
       
      
     

编译：

　　# g++ test.cpp -I/usr/local/include /usr/local/lib/-ljson_linux-gcc-4.4.5_libmt.a

运行：

　　#./a.out 

输出;

　　data:  {"dstdeviceID":456,"mprotocolID":5858,"mprotocolType":123,"mver":4}

       可以发现，jsoncpp的字段排序默认是按照字母的。