根据用户的请求ip地址获取天气（对接高德地图api）

1、获取请求的ip地址(高德地图api)

package com.yami.shop.common.util;

import lombok.extern.slf4j.Slf4j;

import javax.servlet.http.HttpServletRequest;
import java.net.*;

import java.net.InetAddress;

@Slf4j
public class IpInfoUtil {


    public static String getIpAddr(HttpServletRequest request) throws SocketException {

        String ip = request.getHeader("x-forwarded-for");
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }
        if(ip != null) {
            ip=ip.split(",")[0];
        }
        return ip;
        /*String ip = "http://pv.sohu.com/cityjson?ie=utf-8";
        String inputLine = "";
        String read = "";
        String toIp = "";
        try {
            URL url = new URL(ip);
            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
            BufferedReader in = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
            while ((read = in.readLine()) != null) {
                inputLine += read;
            }
            String ObjJson = inputLine.substring(inputLine.indexOf("=") + 1, inputLine.length() - 1);
            JSONObject jsonObj = JSON.parseObject(ObjJson);
            toIp = jsonObj.getString("cip");
        } catch (Exception e) {
            toIp = "";
        }
        return toIp;*/
    }
}

2、获取高德地图的城市code

@Override
    public String getAdcode(String ipAddr) {

        String request = ipUrl + "key=" + key + "&ip=" + ipAddr + "&output=JSON";
        //String request = ipUrl + "key=" + key + "&output=JSON";
        String res = HttpUtil.get(request);
        JSONObject jsonObject = JSONObject.parseObject(res);
        String status = jsonObject.getString("status");
        if (!"1".equals(status))
            throw new OtherException("获取ip方式错误！");

        String infocode = jsonObject.getString("infocode");
        if (!"10000".equals(infocode))
            throw new OtherException("获取ip返回转态失败！");

        return jsonObject.getString("adcode");
    }

3、根据code获取天气

@Override
    public WeatherDTO getWeather(String city) {

        String request = url + city + "&key=" +  key;
        String res = HttpUtil.get(request);
        JSONObject jsonObject = JSONObject.parseObject(res);
        String lives = jsonObject.getString("lives");
        Object o = JSONObject.parseArray(lives).get(0);
        JSONObject weather = JSONObject.parseObject(o.toString());

        WeatherDTO weatherDTO = new WeatherDTO();
        weatherDTO.setProvince(weather.getString("province"));
        weatherDTO.setCity(weather.getString("city"));
        weatherDTO.setWindpower(weather.getString("windpower"));
        weatherDTO.setWeather(weather.getString("weather"));
        weatherDTO.setTemperature(weather.getString("temperature"));
        weatherDTO.setHumidity(weather.getString("humidity"));
        weatherDTO.setWinddirection(weather.getString("winddirection"));

        return weatherDTO;

4、DTO

@Data
public class WeatherDTO implements Serializable {

    @ApiModelProperty(value = "省份")
    private String province;

    @ApiModelProperty(value = "城市")
    private String city;

    @ApiModelProperty(value = "天气现象")
    private String weather;

    @ApiModelProperty(value = "实时气温，单位：摄氏度")
    private String temperature;

    @ApiModelProperty(value = "风向描述")
    private String winddirection;

    @ApiModelProperty(value = "风力级别，单位：级")
    private String windpower;

    @ApiModelProperty(value = "空气湿度")
    private String humidity;

    @ApiModelProperty(value = "数据发布的时间")
    private String reporttime;

}

5、获取天气

@GetMapping("/weather")
    @ApiOperation(value = "获取天气", notes = "根据city获取天气预报", response = WeatherDTO.class)
    public CommonResult getWeather(HttpServletRequest request) throws SocketException {

        String ipAddr = IpInfoUtil.getIpAddr(request);
        log.info("获取用户ip地址====================>,{}", ipAddr);

        //ipAddr = "120.36.246.78";
        String adcode = farmAreaService.getAdcode(ipAddr);
        WeatherDTO weather = farmAreaService.getWeather(adcode);

        return CommonResult.success(weather);
    }