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API网关可以用来统一处理用户的所有请求，会根据不同请求路径将请求路由到不同的微服务中去

集成Zuul

创建项目

以之前的micro-weather-eureka-client-zuul为蓝本，创建msa-weather-eureka-client-zuul项目

修改源码

修改application.properties配置文件：

#应用名称spring.application.name=msa-weather-eureka-client-zuul#注册服务器的URLeureka.client.service-url.defaultZone=http://localhost:8761/eureka/#zuul本身的配置#设置需要路由的URL，此处设置hi资源的路径zuul.routes.city.path=/city/**#访问city应用时将请求转发到某应用的应用名称zuul.routes.city.service-id=msa-weather-city-eureka#zuul本身的配置#设置需要路由的URL，此处设置weather资源的路径zuul.routes.data.path=/data/**#访问city应用时将请求转发到某应用的应用名称zuul.routes.data.service-id=msa-weather-data-eureka

天气预报微服务重构

创建项目

以之前的msa-weather-report-eureka-feign为蓝本，创建msa-weather-report-eureka-feign-gateway项目

package com.study.spring.cloud.weather.service;import com.study.spring.cloud.weather.vo.City;import com.study.spring.cloud.weather.vo.WeatherResponse;import org.springframework.cloud.netflix.feign.FeignClient;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.PathVariable;import java.util.List;@FeignClient("msa-weather-eureka-client-zuul")public interface DataClient {
   	//获取城市列表	@GetMapping("/city/cities")	List
   
     listCity() throws Exception;	//根据城市id查询天气数据	@GetMapping("/data/weather/cityId/{cityId}")	WeatherResponse getDataByCityId(@PathVariable("cityId") String cityId);}
   

删除com.study.spring.cloud.weather.service包下的CityClient和WeatherDataClient两个接口

修改com.study.spring.cloud.weather.controller包下的WeatherReportController类：

package com.study.spring.cloud.weather.controller;import com.study.spring.cloud.weather.service.DataClient;import com.study.spring.cloud.weather.service.WeatherReportService;import com.study.spring.cloud.weather.vo.City;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.ui.Model;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;import org.springframework.web.servlet.ModelAndView;import java.util.List;@RestController@RequestMapping("/report")public class WeatherReportController {
   	//在应用中添加日志	private final static Logger logger=LoggerFactory.getLogger(WeatherReportController.class);	@Autowired	private WeatherReportService weatherReportService;	@Autowired	private DataClient dataClient;	@GetMapping("/cityId/{cityId}")	//@PathVariable：标识从路径中获取参数	public ModelAndView getReportByCityId(@PathVariable("cityId") String cityId,Model model) throws Exception {
   		//获取城市列表		List
   
     cityList=null;		try {
   			//由城市数据API微服务来提供数据			cityList = dataClient.listCity();		} catch (Exception e) {
   			logger.error("Exception!",e);		}		model.addAttribute("title", "天气预报");		model.addAttribute("cityId", cityId);		model.addAttribute("cityList", cityList);		model.addAttribute("report", weatherReportService.getDataByCityId(cityId));		return new ModelAndView("weather/report","reportModel",model);	}	}
   

修改com.study.spring.cloud.weather.service包下的WeatherReportServiceImpl类：

package com.study.spring.cloud.weather.service;import com.study.spring.cloud.weather.vo.Weather;import com.study.spring.cloud.weather.vo.WeatherResponse;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;@Servicepublic class WeatherReportServiceImpl implements WeatherReportService {
   	@Autowired	private DataClient dataClient;	@Override	public Weather getDataByCityId(String cityId) {
   		//由天气数据API微服务来提供数据		WeatherResponse resp=dataClient.getDataByCityId(cityId);		Weather data=resp.getData();		return data;	}}

修改application.properties配置文件：

#热部署静态文件spring.thymeleaf.cache=false#应用名称spring.application.name=msa-weather-report-eureka-feign-gateway#注册服务器的URLeureka.client.service-url.defaultZone=http://localhost:8761/eureka/#请求服务时的超时时间feign.client.config.feignName.connect-timeout=5000#读数据时的超时时间feign.client.config.feignName.read-timeout=5000

运行

先通过IDE运行micro-weather-eureka-server

运行Redis

通过命令行在8081和8082端口运行msa-weather-collection-eureka-feign

通过命令行在8083和8084端口运行msa-weather-data-eureka

通过命令行在8085和8086端口运行msa-weather-city-eureka

通过命令行在8087和8088端口运行msa-weather-report-eureka-feign-gateway

通过命令行在8089端口运行msa-weather-eureka-client-zuul

访问http://localhost:8761页面，可以看到Eureka的管理页面：

转载地址：http://wwswi.baihongyu.com/