//----------------------------------------------------
//AUTHOR: lanyang123456
//DATE: 2014-12-13
//----------------------------------------------------
json-c介绍与库下载请参考
https://github.com/json-c/json-c/wiki
<pre name="code" class="cpp">#include <stdio.h> #include <json/json.h> void test_jsonc() { struct json_object *infor_object = NULL; infor_object = json_object_new_object(); if (NULL == infor_object) { printf("new json object failed.\n"); return; } struct json_object *para_object = NULL; para_object = json_object_new_object(); if (NULL == para_object) { json_object_put(infor_object);//free printf("new json object failed.\n"); return; } struct json_object *array_object = NULL; array_object = json_object_new_array(); if (NULL == array_object) { json_object_put(infor_object);//free json_object_put(para_object);//free printf("new json object failed.\n"); return; } /*添加json值类型到数组中*/ json_object_array_add(array_object, json_object_new_int(256)); json_object_array_add(array_object, json_object_new_int(257)); json_object_array_add(array_object, json_object_new_int(258)); json_object_object_add(para_object, "DeviceId", json_object_new_string("sn_iso_9000")); json_object_object_add(para_object, "MacAddr", json_object_new_string("AA:BB:CC:DD:EE:FF")); json_object_object_add(para_object, "Visible", json_object_new_int(1)); /*添加json名称和值到json对象集合中*/ json_object_object_add(infor_object, "method", json_object_new_string("GetSystemInfo")); json_object_object_add(infor_object, "param", para_object); json_object_object_add(infor_object, "id", json_object_new_string("101")); /*添加数组集合到json对象中*/ json_object_object_add(infor_object, "array", array_object); printf("-----------json infor ---------------------------\n"); printf("%s\n", json_object_to_json_string(infor_object)); printf("-----------json infor ---------------------------\n"); struct json_object *result_object = NULL; result_object = json_object_object_get(infor_object, "method"); printf("-----------result_object method ---------------------------\n"); printf("%s\n", json_object_to_json_string(result_object)); printf("-----------result_object method---------------------------\n"); result_object = json_object_object_get(infor_object, "param"); printf("-----------result_object param ---------------------------\n"); printf("%s\n", json_object_to_json_string(result_object)); printf("-----------result_object param---------------------------\n"); result_object = json_object_object_get(infor_object, "array"); printf("-----------result_object array---------------------------\n"); printf("%s\n", json_object_to_json_string(result_object)); printf("-----------result_object array---------------------------\n"); int i; for(i = 0; i < json_object_array_length(result_object); i++) { struct json_object *obj = json_object_array_get_idx(result_object, i); printf("\t[%d]=%s\n", i, json_object_to_json_string(obj)); } json_object_put(infor_object);//free } int main(int argc, char *argv[]) { test_jsonc(); return 0; }
编译与执行
$ gcc -o test1 test1.c -ljson
$ ./test1
-----------json infor ---------------------------
{ "method": "GetSystemInfo", "param": { "DeviceId": "sn_iso_9000", "MacAddr": "AA:BB:CC:DD:EE:FF", "Visible": 1 }, "id": "101", "array": [ 256, 257, 258 ] }
-----------json infor ---------------------------
-----------result_object method ---------------------------
"GetSystemInfo"
-----------result_object method---------------------------
-----------result_object param ---------------------------
{ "DeviceId": "sn_iso_9000", "MacAddr": "AA:BB:CC:DD:EE:FF", "Visible": 1 }
-----------result_object param---------------------------
-----------result_object array---------------------------
[ 256, 257, 258 ]
-----------result_object array---------------------------
[0]=256
[1]=257
[2]=258