实例：
{
"FENCE_CONFIG": {
"CHANNEL_INTERVAL": "100"
"CHANNEL_ENABLE": [["1", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0"], ["1", "0", "0", "0", "0", "1", "0", "0", "0", "0", "0", "0", "0", "0"], ["1", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0"]],
},
}
更新二维数组
程序
FILE *fp;
int len = 0;
char *data_file = NULL;
int array_size,iCnt;
char ChangeChannel[3] = "";
fp=fopen("./device.json","rb");
fseek(fp,0,SEEK_END);
len=ftell(fp);
fseek(fp,0,SEEK_SET);
data_file=(char *)malloc(len+1);
memset(data_file,0,len+1);
fread(data_file,1,len,fp);
fclose(fp);
/* 解析JSON数据包，*/
if(NULL == (deviceObject = cJSON_Parse(data_file)))
{
printf("Error before: [%s]\n",cJSON_GetErrorPtr());
cJSON_Delete(cJsonObject);
return -1;
}
/*可从cJSON结构体中查找某个子节点名称（键名称），如果查找成功可把该子节点序列化到cJSON结构体中。*/
if(NULL == (deviceFence = cJSON_GetObjectItem(deviceObject,"FENCE_CONFIG")))
{
printf("cJSON cJSON_GetObjectItem cJson FENCE_CONFIG failed !\n");
cJSON_Delete(deviceObject);
return -1;
}
else
{
cJSON *deviceArrayEnable = NULL;
cJSON *deviceArrayEnable2 = NULL;
/*更新CHANNEL_INTERVAL信道json*/
cJSON_ReplaceItemInObject(deviceFence,"CHANNEL_INTERVAL",cJSON_CreateString(channelInterval));
if(NULL == (deviceChannelEnable = cJSON_GetObjectItem(deviceFence,"CHANNEL_ENABLE")))
printf("cJSON cJSON_GetObjectItem cJson channel_enable failed !\n");
else
{
array_size = cJSON_GetArraySize(deviceChannelEnable);
for(iCnt=0;iCnt<array_size;iCnt++)
{
if(NULL == (deviceArrayEnable = cJSON_GetArrayItem(deviceChannelEnable,iCnt)))
{
printf("%s(%d),fail to get array!",__func__,__LINE__);
continue;
}
int iCnt2 =0;
int array_size2 = cJSON_GetArraySize(deviceArrayEnable);
for(iCnt2=0;iCnt2<array_size2;iCnt2++)
{
if(NULL == (deviceArrayEnable2 = cJSON_GetArrayItem(deviceArrayEnable,iCnt2)))
{
printf("%s(%d),fail to get array!",__func__,__LINE__);
continue;
}
char str[3];
sprintf(str,"%d",channelEnable[iCnt][iCnt2]);
printf("str=%s\n",str);
printf("iCnt2=%d\n",iCnt2);
cJSON_ReplaceItemInArray(deviceArrayEnable,iCnt2,cJSON_CreateString(str));
printf("Re channel[%d][%d]:%d\n",iCnt,iCnt2,channelEnable[iCnt][iCnt2]);
}
}
}
}
printf("line=%d\n",__LINE__);
char *out;
out=cJSON_Print(deviceObject);
//cJSON_Delete(deviceObject);
printf("line=%d\n",__LINE__);
//printf("out=%s\n",out);
FILE *fp_w = fopen("./device.json","w");
fwrite(out,strlen(out),1,fp_w);
fclose(fp_w);
free(out);