cJSON-on-stm32

//https://github.com/DaveGamble/cJSON

//create a object with a list //NOTE: Returns a heap allocated string, you are required to free it after use. void *createJS(void) { cJSON *root = cJSON_CreateObject(); /create json string root/ if(!root) { DEBUG("get root faild !\n"); goto EXIT; }else DEBUG("get root success!\n");

{			
			cJSON *name = cJSON_CreateString("Jack");
		  cJSON_AddItemToObject(root,"name",name); //添加”name":"Jack"
			{
				cJSON *body = cJSON_CreateObject();
				cJSON_AddItemToObject(root,"body",body); //添加"body":{}
				
				cJSON_AddItemToObject(body,"height",cJSON_CreateNumber(175));
				cJSON_AddItemToObject(body,"weight",cJSON_CreateString("75kg"));
			}
			{
				cJSON *skills = cJSON_CreateArray();
				cJSON_AddItemToObject(root,"skill",skills);//添加"skill":[]
				{
					cJSON *skill = cJSON_CreateObject();
					cJSON_AddItemToArray(skills,skill);
					cJSON_AddItemToObject(skill,"lan",cJSON_CreateString("C"));
					cJSON_AddItemToObject(skill,"level",cJSON_CreateString("very good"));
				}
				{
					cJSON *skill = cJSON_CreateObject();
					cJSON_AddItemToArray(skills,skill);
					cJSON_AddItemToObject(skill,"lan",cJSON_CreateString("Java"));
					cJSON_AddItemToObject(skill,"level",cJSON_CreateString("good"));
				}
			}
			{ //输出
				char *s = cJSON_PrintUnformatted(root);//cJSON_Print(root); //带格式输出
				if(s){
						DEBUG("create js string is %s\n",s);
						free(s);
				}
			}
}
	{
		char *ret = cJSON_PrintUnformatted(root);
		cJSON_Delete(root);
		return ret;
	}

EXIT: return 0; }

int parseJS(char *jsonString) { //"{"name":"Jack","body":{"height":175,"weight":"75kg"},"skill":[{"lan":"C","level":"very good"},{"lan":"Java","level":"good"}]} //1.先将普通的json串处理成json对象,注意：这个对像在解析完成后，需要释放掉 cJSON *root = cJSON_Parse(jsonString);

//2.拿关键字，但如果关键字还有父层,就需要先从父层开拿，所谓剥洋葱是也
cJSON *name = cJSON_GetObjectItem(root,"name");
if(!name){
	DEBUG("no name\n");
	return -1;
}
if(name->type == cJSON_String)
	DEBUG("%s:%s\n",name->string,name->valuestring);

{
	cJSON *body = cJSON_GetObjectItem(root,"body"); //解析内带的对像
	if(body->type == cJSON_Object){
		cJSON *height = cJSON_GetObjectItem(body,"height");
		if(height->type == cJSON_Number)
			DEBUG("%s:%d\n",height->string,height->valueint);
	}
}
{
	cJSON *skills = cJSON_GetObjectItem(root,"skill"); //解析数组
	if(skills->type == cJSON_Array){
		int i,size = cJSON_GetArraySize(skills);
		for(i=0;i<size;i++){
			cJSON *skill = cJSON_GetArrayItem(skills,i);
			cJSON *skill_lan = cJSON_GetObjectItem(skill,"lan");
			DEBUG("skill:%s:%s\n",skill_lan->string,skill_lan->valuestring);
		}
	}
}

if(!root)
	cJSON_Delete(root);

}