cJSON: 一个用c写的一个简单好用的JSON解析器

转自：http://blog.csdn.net/chenzhongjing/article/details/9188347

 

下载地址: http://sourceforge.net/projects/cjson/files/?source=navbar



 



实例1: 创建一个简单的学生信息数组



 cJSON* pRoot = cJSON_CreateObject();

 cJSON* pArray = cJSON_CreateArray();

 cJSON_AddItemToObject(pRoot, "students_info", pArray);

 char* szOut = cJSON_Print(pRoot);



 cJSON* pItem = cJSON_CreateObject();

 cJSON_AddStringToObject(pItem, "name", "chenzhongjing");

 cJSON_AddStringToObject(pItem, "sex", "male");

 cJSON_AddNumberToObject(pItem, "age", 28);

 cJSON_AddItemToArray(pArray, pItem);



 pItem = cJSON_CreateObject();

 cJSON_AddStringToObject(pItem, "name", "fengxuan");

 cJSON_AddStringToObject(pItem, "sex", "male");

 cJSON_AddNumberToObject(pItem, "age", 24);

 cJSON_AddItemToArray(pArray, pItem);



 pItem = cJSON_CreateObject();

 cJSON_AddStringToObject(pItem, "name", "tuhui");

 cJSON_AddStringToObject(pItem, "sex", "male");

 cJSON_AddNumberToObject(pItem, "age", 22);

 cJSON_AddItemToArray(pArray, pItem);



 char* szJSON = cJSON_Print(pRoot);

 cJSON_Delete(pRoot);

 //free(szJSON);



 pRoot = cJSON_Parse(szJSON);

 pArray = cJSON_GetObjectItem(pRoot, "students_info");

 if (NULL == pArray)

 {

     return -1;

 }

 

 int iCount = cJSON_GetArraySize(pArray);

 for (int i = 0; i < iCount; ++i)

 {

     cJSON* pItem = cJSON_GetArrayItem(pArray, i);

     if (NULL == pItem)

     {

         continue;

     }



     string strName = cJSON_GetObjectItem(pItem, "name")->valuestring;

     string strSex = cJSON_GetObjectItem(pItem, "sex")->valuestring;

     int iAge = cJSON_GetObjectItem(pItem, "age")->valueint;

 }



 cJSON_Delete(pRoot);

 free(szJSON);