json-c例子

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我是靠谱客的博主野性魔镜，最近开发中收集的这篇文章主要介绍json-c例子，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

//----------------------------------------------------

//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("%sn", 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("%sn", 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("%sn", 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("%sn", 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]=%sn", 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