SpringBoot 调用天气预报api接口获取天气数据（1）

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项目结构：

通过城市的名字获取天气数据：

http://wthrcdn.etouch.cn/weather_mini?city=北京

通过城市id获得天气数据（可以自己在百度搜索城市的id）

http://wthrcdn.etouch.cn/weather_mini?citykey=101010100

1.通过Gradle导入相关jar包：

ps:

推荐两个我常用的中央仓库：

http://mvnrepository.com

扫描二维码关注公众号，回复： 3400007 查看本文章

http://maven.aliyun.com

2.这里我用的是谷歌浏览器的插件PostMan，

根据返回给我们的数据参数去创建实体类。

3.创建实体类。

1）Weather：

package com.lucifer.demo.pojo;

import java.io.Serializable;
import java.util.List;

/**
 * @author: Lucifer
 * @create: 2018-09-23 23:00
 * @description: 天气信息
 **/
public class Weather implements Serializable {

/*
             http://wthrcdn.etouch.cn/weather_mini?city=北京
 {
        "data":{
        "yesterday":{
            "date":"22日星期六", "high":"高温 24℃", "fx":"西北风", "low":"低温 13℃", "fl":"<![CDATA[3-4级]]>", "type":"晴"
        },"city":"北京", "aqi":"35", "forecast":[{
            "date":"23日星期天", "high":"高温 24℃", "fengli":"<![CDATA[4-5级]]>", "low":"低温 12℃", "fengxiang":"北风", "type":"晴"
        },{
            "date":"24日星期一", "high":"高温 23℃", "fengli":"<![CDATA[<3级]]>", "low":"低温 11℃", "fengxiang":"无持续风向", "type":
            "晴"
        },{
            "date":"25日星期二", "high":"高温 23℃", "fengli":"<![CDATA[<3级]]>", "low":"低温 13℃", "fengxiang":"南风", "type":"多云"
        },{
            "date":"26日星期三", "high":"高温 22℃", "fengli":"<![CDATA[<3级]]>", "low":"低温 14℃", "fengxiang":"南风", "type":"多云"
        },{
            "date":"27日星期四", "high":"高温 22℃", "fengli":"<![CDATA[3-4级]]>", "low":"低温 14℃", "fengxiang":"南风", "type":"阴"
        }],"ganmao":"各项气象条件适宜，无明显降温过程，发生感冒机率较低。", "wendu":"14"
    },"status":1000, "desc":"OK"
    }*/

    private String city;
    private Yesterday yesterday;
    private String aqi;
    private String ganmao;
    private String wendu;
    private List<Forecast> forecast;

    public String getCity() {
        return city;
    }

    public void setCity(String city) {
        this.city = city;
    }

    public Yesterday getYesterday() {
        return yesterday;
    }

    public void setYesterday(Yesterday yesterday) {
        this.yesterday = yesterday;
    }

    public String getAqi() {
        return aqi;
    }

    public void setAqi(String aqi) {
        this.aqi = aqi;
    }

    public String getGanmao() {
        return ganmao;
    }

    public void setGanmao(String ganmao) {
        this.ganmao = ganmao;
    }

    public String getWendu() {
        return wendu;
    }

    public void setWendu(String wendu) {
        this.wendu = wendu;
    }

    public List<Forecast> getForecast() {
        return forecast;
    }

    public void setForecast(List<Forecast> forecast) {
        this.forecast = forecast;
    }
}

2）Yesterday：

package com.lucifer.demo.pojo;

import java.io.Serializable;

/**
 * 昨日天气
 *
 * @author: Lucifer
 * @create: 2018-09-23 23:10
 * @description:
 **/
public class Yesterday implements Serializable {
   /* "yesterday":{
        "date":"22日星期六", "high":"高温 24℃", "fx":"西北风", "low":"低温 13℃", "fl":"<![CDATA[3-4级]]>", "type":"晴"
    },*/

    private String date;
    private String high;
    private String fx;
    private String low;
    private String fl;
    private String type;

    public String getDate() {
        return date;
    }

    public void setDate(String date) {
        this.date = date;
    }

    public String getHigh() {
        return high;
    }

    public void setHigh(String high) {
        this.high = high;
    }

    public String getFx() {
        return fx;
    }

    public void setFx(String fx) {
        this.fx = fx;
    }

    public String getLow() {
        return low;
    }

    public void setLow(String low) {
        this.low = low;
    }

    public String getFl() {
        return fl;
    }

    public void setFl(String fl) {
        this.fl = fl;
    }

    public String getType() {
        return type;
    }

    public void setType(String type) {
        this.type = type;
    }
}

3）Forecast：

package com.lucifer.demo.pojo;

import java.io.Serializable;

/**
 * 未来天气
 *
 * @author: Lucifer
 * @create: 2018-09-23 23:10
 * @description:
 **/
public class Forecast implements Serializable {

 /*   "forecast":[{
        "date":"23日星期天", "high":"高温 24℃", "fengli":"<![CDATA[4-5级]]>", "low":"低温 12℃", "fengxiang":"北风", "type":"晴"
    },{
        "date":"24日星期一", "high":"高温 23℃", "fengli":"<![CDATA[<3级]]>", "low":"低温 11℃", "fengxiang":"无持续风向", "type":
        "晴"
    },{
        "date":"25日星期二", "high":"高温 23℃", "fengli":"<![CDATA[<3级]]>", "low":"低温 13℃", "fengxiang":"南风", "type":"多云"
    },{
        "date":"26日星期三", "high":"高温 22℃", "fengli":"<![CDATA[<3级]]>", "low":"低温 14℃", "fengxiang":"南风", "type":"多云"
    },{
        "date":"27日星期四", "high":"高温 22℃", "fengli":"<![CDATA[3-4级]]>", "low":"低温 14℃", "fengxiang":"南风", "type":"阴"
    }]*/

    private String date;
    private String high;
    private String fengli;
    private String low;
    private String fengxiang;
    private String type;

    public String getDate() {
        return date;
    }

    public void setDate(String date) {
        this.date = date;
    }

    public String getHigh() {
        return high;
    }

    public void setHigh(String high) {
        this.high = high;
    }

    public String getFengli() {
        return fengli;
    }

    public void setFengli(String fengli) {
        this.fengli = fengli;
    }

    public String getLow() {
        return low;
    }

    public void setLow(String low) {
        this.low = low;
    }

    public String getFengxiang() {
        return fengxiang;
    }

    public void setFengxiang(String fengxiang) {
        this.fengxiang = fengxiang;
    }

    public String getType() {
        return type;
    }

    public void setType(String type) {
        this.type = type;
    }
}

4.创建service接口：

WeatherDataService：

package com.lucifer.demo.Service;

import com.lucifer.demo.pojo.WeatherResponse;

/**
 * 天气数据接口
 */
public interface WeatherDataService {

    /**
     * 根据城市ID查询天气数据
     * @param CityId
     * @return
     */
    WeatherResponse getDataByCityId(String CityId);

    /**
     * 根据城市名称查询天气数据
     * @param cityName
     * @return
     */
    WeatherResponse getDataByCityName(String cityName);

}

5.创建实现类：

package com.lucifer.demo.Service;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.lucifer.demo.pojo.WeatherResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Service;
import org.springframework.web.client.RestTemplate;

/**
 * @author: Lucifer
 * @create: 2018-09-23 23:24
 * @description: 实现类
 **/

@Service
public class WeatherDataServiceImpl implements WeatherDataService {

    private static final String WEATHER_URI = "http://wthrcdn.etouch.cn/weather_mini?";

    @Autowired
    private RestTemplate restTemplate;

    @Override
    public WeatherResponse getDataByCityId(String cityId) {
        String uri = WEATHER_URI + "citykey=" + cityId;
        return this.getWeatherResponse(uri);
    }


    @Override
    public WeatherResponse getDataByCityName(String cityName) {
        String uri = WEATHER_URI + "city=" + cityName;
        return this.getWeatherResponse(uri);
    }


    private WeatherResponse getWeatherResponse(String uri) {
        ResponseEntity<String> respString = restTemplate.getForEntity(uri, String.class);
        ObjectMapper objectMapper = new ObjectMapper();
        WeatherResponse resp = null;
        String strBody = null;
        if (respString.getStatusCodeValue() == 200) {
            strBody = respString.getBody();
        }
        try {
            resp = objectMapper.readValue(strBody, WeatherResponse.class);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return resp;
    }

}

6.创建controller类：

package com.lucifer.demo.Controller;

import com.lucifer.demo.Service.WeatherDataService;
import com.lucifer.demo.pojo.WeatherResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author: Lucifer
 * @create: 2018-09-23 23:45
 * @description:
 **/
@RestController
@RequestMapping(value = "/weather")
public class WeatherController {

    @Autowired
    private WeatherDataService weatherDataService;

    @GetMapping(value = "/cityId/{cityId}")
    public WeatherResponse getWeatherByCityId(@PathVariable("cityId") String cityId){
        return weatherDataService.getDataByCityId(cityId);
    }

    @GetMapping(value = "/cityName/{cityName}")
    public WeatherResponse getWeatherByCityName(@PathVariable("cityName") String cityName){
        return weatherDataService.getDataByCityName(cityName);
    }

}

7.RestConfiguration 配置类：

package com.lucifer.demo.config;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.web.client.RestTemplateBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;

/**
 * @author: Lucifer
 * @create: 2018-09-23 23:51
 * @description:
 **/
@Configuration
public class RestConfiguration {

    @Autowired
    private RestTemplateBuilder restTemplateBuilder;

    @Bean
    public RestTemplate restTemplate(){
        return restTemplateBuilder.build();
    }

}

8.通过localhost:8080/weather/cityName/北京