天气预报接口_001_天气预报API

天气预报API

聚合API

https://www.juhe.cn/docs

注册个人账号，实名认证后每天有100次免费请求额度。免费API中包括天气预报、新闻头条、笑话大全、万年历等。

天气预报API

https://www.juhe.cn/docs/api/id/73

接口地址：http://apis.juhe.cn/simpleWeather/query

返回格式：json

请求方式：http get/post

请求示例：http://apis.juhe.cn/simpleWeather/query?city=%E8%8B%8F%E5%B7%9E&key=

接口备注：通过城市名称或城市ID查询天气预报情况

请求参数说明：

| | 名称 | 必填 | 类型 | 说明 | | ---- | ---- | ---- | ------ | ------------------------------------------------------------ | | | city | 是 | string | 要查询的城市名称/id，城市名称如：温州、上海、北京，需要utf8 urlencode | | | key | 是 | string | 在个人中心->我的数据,接口名称上方查看 |

返回参数说明：

| | 名称 | 类型 | 说明 | | ---- | ----------- | ------ | ------------------------- | | | error_code | int | 返回码，0为查询成功 | | | reason | string | 返回说明 | | | result | string | 返回结果集 | | | - | - | - | | | realtime | - | 当前天气详情情况 | | | info | string | 天气情况，如：晴、多云 | | | wid | string | 天气标识id，可参考小接口2 | | | temperature | string | 温度，可能为空 | | | humidity | string | 湿度，可能为空 | | | direct | string | 风向，可能为空 | | | power | string | 风力，可能为空 | | | aqi | string | 空气质量指数，可能为空 | | | - | - | - | | | future | - | 近5天天气情况 | | | date | string | 日期 | | | temperature | string | 温度，最低温/最高温 | | | weather | string | 天气情况 | | | direct | string | 风向 |

JSON返回示例：

{"reason": "查询成功","result": {"city": "苏州","realtime": {"temperature": "4","humidity": "82","info": "阴","wid": "02","direct": "西北风","power": "3级","aqi": "80"},"future": [{"date": "2019-02-22","temperature": "1/7℃","weather": "小雨转多云","wid": {"day": "07","night": "01"},"direct": "北风转西北风"},{"date": "2019-02-23","temperature": "2/11℃","weather": "多云转阴","wid": {"day": "01","night": "02"},"direct": "北风转东北风"},{"date": "2019-02-24","temperature": "6/12℃","weather": "多云","wid": {"day": "01","night": "01"},"direct": "东北风转北风"},{"date": "2019-02-25","temperature": "5/12℃","weather": "小雨转多云","wid": {"day": "07","night": "01"},"direct": "东北风"},{"date": "2019-02-26","temperature": "5/11℃","weather": "多云转小雨","wid": {"day": "01","night": "07"},"direct": "东北风"}]},"error_code": 0
}

Linux下通过C获取天气

通过curl命令进行http get请求，并使用cJSON库解析返回结果

cJSON库：https://sourceforge.net/projects/cjson/

weather.c

#include <stdio.h>
#include <stdlib.h>
#include "include.h"//!!!使用时请换成自己的KEY
#define API_KEY "自己的KEY"
//输出菜单
int menu();
//请求对应城市的天气
int simpleWeather(int cityIndex);enum{BEJING = 0,SHANGHAI = 1,FUZHOU = 2,SHENZHENG = 3,CITY_COUNT,
};char *city[CITY_COUNT] = {"北京","上海","福州","深圳"
};int main(int argc, char const *argv[])
{int input = 0;while (1){menu();scanf("%d", &input);switch (input){case 1://printf("北京n");simpleWeather(BEJING);break;case 2://printf("上海n");simpleWeather(SHANGHAI);break;case 3://printf("福州n");simpleWeather(FUZHOU);break;default:printf("未知菜单,程序退出n");return 0;}}return 0;
}int menu()
{printf("天气预报n");printf("1.北京n");printf("2.上海n");printf("3.福州n");printf("输入序号获取天气:n");return 0;
}int simpleWeather(int cityIndex)
{if(cityIndex >= CITY_COUNT){printf("查询不到城市数据!n");return 0;}printf("查询城市 :%sn", city[cityIndex]);char cmd[MAX_LEN] = {0};char result[RESULT_BUF_LEN] = {0};//生成API请求urlsprintf(cmd, "curl -s "http://apis.juhe.cn/simpleWeather/query?city=%s&key=%s"", city[cityIndex], API_KEY);popenCmd(cmd, result);//printf("result :%sn", result);cJSON * root = NULL;cJSON * api_result = NULL, *api_realtime = NULL;root = cJSON_Parse(result);if(NULL == root){printf("解析json数据失败!n");return -1;}//先查找resultapi_result = cJSON_GetObjectItem(root, "result");//再查找realtimeapi_realtime = cJSON_GetObjectItem(api_result, "realtime");//printf("%sn", cJSON_Print(api_realtime));/*"realtime": {"temperature":  "30","humidity": "48","info": "阴","wid":  "02","direct":   "南风","power":    "2级","aqi":  "65"}*/cJSON *temp = cJSON_GetObjectItem(api_realtime, "temperature");cJSON *humidity = cJSON_GetObjectItem(api_realtime, "humidity");cJSON *info = cJSON_GetObjectItem(api_realtime, "info");cJSON *direct = cJSON_GetObjectItem(api_realtime, "direct");printf("温度：%s度n", temp->valuestring);printf("湿度：%s度n", humidity->valuestring);printf("天气：%sn", info->valuestring);printf("风向：%sn", direct->valuestring);return 0;
}

tools.c

目前读取popen结果使用最大缓存102400，最好修改代码将缓存改小，重复读取。

#include <stdio.h>
#include "include.h"int popenCmd(char *cmd, char *result)
{//运行命令,将结果保存到resultsFILE *fp = popen(cmd, "r");if (NULL == fp){printf("打开 file命令失败n");goto err;}//将结果读取到results字符串数组中fgets(result, RESULT_BUF_LEN, fp);if (fp){pclose(fp);fp = NULL;}return 0;err:if (fp){pclose(fp);fp = NULL;}return -1;
}

include.h

#include "cJSON.h"#define MAX_LEN 256
#define RESULT_BUF_LEN 102400//执行命令,将命令结果保存到result
int popenCmd(char *cmd, char *result);
#编译命令：
gcc weather.c cJSON.c tools.c -lm -o weather
./weather#输入结果:
天气预报
1.北京
2.上海
3.福州
输入序号获取天气:
1
查询城市 :北京
温度：25度
湿度：82度
天气：多云
风向：东北风