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 cityId
* Creturn
*/
Wea therResponse getDataByCityName (String cityName) ;
}

package com. way1au . spr ing.cloud.weather .service;
import java. io. IOException;
import org.slf4j . Logger;
import org.slf4j. LoggerFactory;
import org.springf ramework. beans. factory . annotation.Autowired;
import org. springfr amework. data. redis. core. StringRedisTemplate;
import org. springf ramework. data. redis.core. ValueOperations;
import org. springf ramework. stereotype. Service;
import com. fasterxml. jackson.databind. objectMapper;
import com. waylau. spring. cloud . weather . vo . Wea therResponse;
/**
k天气数据服务.
@since 1.0.0 2017年10月29日 
* @author <a href="https:/ /waylau.com">Way Lau</a>
@Service
public class WeatherDataServiceImpl implements WeatherDataService {
private final static Logger logger = LoggerFactory .getLogger (Weather
DataServiceImpl.class) ;
@Autowi red
private StringRedisTemplate stringRedisTemplate; 
private final String WEATHER API = "http://wthrcdn. etouch . cn/weather_
mini";
@Override
public WeatherResponse getDa taByCityId(String cityId) {
String uri = WEATHER API + "?citykey=" + cityId;
return this. doGetWea therData (uri) ;
@Override
public WeatherResponse getDataByCityName (String cityName) {
String uri = WEATHER_ API + "?city=" + cityName ;
return this. doGe tWeatherData (uri) ;
private WeatherResponse doGetWea therData (String uri)
valueOperations<String, String> ops = this.stringRedisTemplate.
opsForValue() ;
String key = uri;
String strBody = null;
/先查缓存，查不到抛出异常
if (!this. stringRedisTemplate . hasKey (key)) {
logger .error("不存在key "+ key) ;
throw new Runt imeException ("没有相应的天气信息") ;
} else {
logger.info("存在key"+ key + ", value=" + ops.get (key));
strBody = ops.get (key) ;
}
0bj ectMapper mapper = new ObjectMapper () ;
WeatherResponse weather = null;
try {
weather = mapper . readvalue (strBody, WeatherResponse.class) ;
} catch (IOException e) {
logger . error ("JSON反序列化异常! ",e);
throw new RuntimeException ("天气信息解析失败") ;
return weather;
}
}

@RestController
@RequestMapping (" /weather")
public class Wea therController {
@Autowi red 
private WeatherDataService weatherDataService;
@GetMapping ("/cityId/ {cityId}")
public WeatherResponse getReportByCityId (@PathVariable ("cityId")
String cityId) {
return weatherDataService. getDataByCityId (cityId) ;
@GetMapping ("/cityName/ {cityName}")
public WeatherResponse getReportByCityName (@PathVariable ("cityName")
String cityName) {
return weatherDataService . getDataByCityName (cityName) ;}
}

"timestamp": 1509289762537,
"status": 500，
"error": "Internal Server Error",
"message":” 没有相应的天气信息"，
"path": "/weather/cityId/101280601"
当Redis中天气数据存在时，则将返回相应的天气信息。
"data": {
"city": "深圳"，
"aqi": "81",
"wendu": "23",
"ganmao": "各项气象条件适宜，无明显降温过程，发生感冒机率较低。"，
"yesterday":
"date": "28日 星期六"，
"high": "高温29"C"，
"fx": "无持续风向"，
"low": "低温20°C"
"fI": "<! [CDATA[<3级]]>"，
"type": "晴"
},
"forecast": [
"date": "29日 星期天"，
"high": "高温27"C",
"fengxiang": "无持续风向"，
"low": "低温20C"，
"fengli": "<! [CDATA[<3级]]>"，
"type": "多云"
"date": "30日 星期一一"，
"high": "高温26"C",
"fengxiang": "无持续风向"，
"1ow": "低温17C",
"fengli": "<! [CDATA[<3级]]>"，
"type": "晴 ”
"date": "31日 星期二"，
"high": "高温25"C",
"fengxiang": "无持续风向"，
"low": "低温17C",
"fengli": "<! [CDATA[<3级]]>",
"type": "多云"
}，
{
"date": "1日星期三"，
"high": "高温26"C",
"fengxiang":”无持续风向"，
"low": "低温18C",
"fengli": "<! [CDATA[<3级]]>"，
"type": "多云"
}，
"date": "2 日星期四"，
"high": "高温27C",
"fengxiang": "无持续风向"，
"low": "低温20C"，
"fengli": "<! [CDATA[<3级]]>"，
"type": "多云"
},
"status": "1000",
"desc": "OK"}