cjson解析下面数据{ "name": "sys", "type": "table", "data": [ { "name": "dbc_path", "type": "string", "data": "/usrdata/dbc/GB-EP40_CAN_r5_v1.0.dbc" }, { "name": "first_boot", "type": "unsigned", "data": "0" }, ] }

解析这个 JSON 数据需要使用 cjson 库，可以使用以下代码：

#include <stdio.h>
#include <stdlib.h>
#include "cJSON.h"

int main()
{
    const char *json_data = "{ \"name\": \"sys\", \"type\": \"table\", \"data\": [ { \"name\": \"dbc_path\", \"type\": \"string\", \"data\": \"/usrdata/dbc/GB-EP40_CAN_r5_v1.0.dbc\" }, { \"name\": \"first_boot\", \"type\": \"unsigned\", \"data\": \"0\" } ] }";

    cJSON *root = cJSON_Parse(json_data);
    if (root == NULL) {
        printf("Error before: [%s]\n", cJSON_GetErrorPtr());
        return 1;
    }

    cJSON *name = cJSON_GetObjectItem(root, "name");
    printf("name: %s\n", name->valuestring);

    cJSON *type = cJSON_GetObjectItem(root, "type");
    printf("type: %s\n", type->valuestring);

    cJSON *data = cJSON_GetObjectItem(root, "data");
    int size = cJSON_GetArraySize(data);
    printf("data size: %d\n", size);

    for (int i = 0; i < size; i++) {
        cJSON *item = cJSON_GetArrayItem(data, i);

        cJSON *name = cJSON_GetObjectItem(item, "name");
        printf("item name: %s\n", name->valuestring);

        cJSON *type = cJSON_GetObjectItem(item, "type");
        printf("item type: %s\n", type->valuestring);

        cJSON *data = cJSON_GetObjectItem(item, "data");
        printf("item data: %s\n", data->valuestring);
    }

    cJSON_Delete(root);

    return 0;
}

输出结果：

name: sys
type: table
data size: 2
item name: dbc_path
item type: string
item data: /usrdata/dbc/GB-EP40_CAN_r5_v1.0.dbc
item name: first_boot
item type: unsigned
item data: 0