怎么做点击文字进入的网站,下载资料免费网站,怎样制作网络平台,肇庆正规网页设计培训试听在使用spring boot调用第三方api中#xff0c;常用的是okhttp、apache http client等#xff0c;但是直接使用下来还是有点繁琐#xff0c;需要手动转换实体。
在springcloud中有个openfeign调用#xff0c;第一次体验到调用接口还能这么丝滑。注解写道接口上#xff0c;…在使用spring boot调用第三方api中常用的是okhttp、apache http client等但是直接使用下来还是有点繁琐需要手动转换实体。
在springcloud中有个openfeign调用第一次体验到调用接口还能这么丝滑。注解写道接口上配置一下其他交给框架处理。搜了一下这种方式叫做声明式调用。类似的还有Retrofit、forest框架。
openfeign集成到springboot中有何优点openfeign吸收了Retrofit框架的优点做了声明式API但是没有Retrofit多余的Call层。forest是一款国产优秀的框架单独使用问题不大但对于后续升级到cloud的boot项目共存时存在不少问题并且对上传大文件部分场景的支持有点问题。
这里分两步先介绍RequestLine注解调用后介绍GetMapping的spring注解调用。
一、传统注解RequestLine调用
1.加依赖 !-- feign --dependencygroupIdio.github.openfeign/groupIdartifactIdfeign-core/artifactIdversion11.0/version/dependencydependencygroupIdcom.netflix.feign/groupIdartifactIdfeign-jackson/artifactIdversion8.18.0/version/dependency2.写代码
以天气api接口为例
controller层
package com.vvvtimes.demo.controller;import com.vvvtimes.demo.common.dto.RestResponse;
import com.vvvtimes.demo.domain.dto.WeatherCityDTO;
import com.vvvtimes.demo.domain.mybatis.City;
import com.vvvtimes.demo.domain.vo.WeatherVo;
import com.vvvtimes.demo.service.WeatherService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;import java.util.List;RestController
RequestMapping(/weather)
public class WeatherController {Autowiredprivate WeatherService weatherService;RequestMapping(value city/{id:1[0-9]{8}}, method {RequestMethod.POST, RequestMethod.GET})public RestResponseWeatherVo loadApi(PathVariable(id) String id) {return weatherService.loadApi(id);}}
service层
/*** 获取数据* param id* return*/Cacheable(cacheNames weather_cache, key #id)// 从缓存获取key为ID缓存具体看 ehcache.xml 配置文件public RestResponseWeatherVo loadApi(String id) {RestResponseWeatherVo result new RestResponse();WeatherVo weatherVo sojsonApiClient.getCityWeather(id);if(weatherVo!null weatherVo.isSuccess()){result.setResult(weatherVo);}return result;}
//client层
package com.vvvtimes.demo.client;import com.vvvtimes.demo.domain.vo.WeatherVo;
import feign.Param;
import feign.RequestLine;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;import java.util.Map;Component
public interface SojsonApiClient {//GetMapping(value /api/weather/city/{id})RequestLine(GET /api/weather/city/{id})WeatherVo getCityWeather(Param(id) String id);}client拦截器
package com.vvvtimes.demo.client.interception;import feign.RequestInterceptor;
import feign.RequestTemplate;public class SojsonInterceptor implements RequestInterceptor {Overridepublic void apply(RequestTemplate requestTemplate) {}
}feign配置
package com.vvvtimes.demo.config;import com.vvvtimes.demo.client.IpinfoApiClient;
import com.vvvtimes.demo.client.SojsonApiClient;
import com.vvvtimes.demo.client.interception.IpinfoInterceptor;
import com.vvvtimes.demo.client.interception.SojsonInterceptor;
import feign.Feign;
import feign.jackson.JacksonDecoder;
import feign.jackson.JacksonEncoder;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;Configuration
public class ApiRegisterConfig {Value(${sojson.base.url:http://t.weather.sojson.com/})private String sojsonRegisterUrl;Beanpublic SojsonApiClient sojsonApiRegister() {return Feign.builder().encoder(new JacksonEncoder()).decoder(new JacksonDecoder()).requestInterceptor(new SojsonInterceptor()).target(SojsonApiClient.class, sojsonRegisterUrl);}}3.测试访问
http://localhost:9000/weather/city/101010100 二、spring注解GetMapping使用
上面使用的注解多少有点别扭实际上我们可以通过feign-contract Feign的契约方式来使用spring的注解。
这里只对比上的代码讲解改造过程不给出全代码
1.改造依赖
上面的feign依赖替换如下 !-- feign --dependencygroupIdio.github.openfeign/groupIdartifactIdfeign-core/artifactIdversion11.6/version/dependencydependencygroupIdio.github.openfeign/groupIdartifactIdfeign-spring4/artifactIdversion11.6/version/dependencydependencygroupIdio.github.openfeign/groupIdartifactIdfeign-jackson/artifactIdversion11.6/version/dependencydependencygroupIdio.github.openfeign/groupIdartifactIdfeign-httpclient/artifactIdversion11.6/version/dependencydependencygroupIdio.github.openfeign.form/groupIdartifactIdfeign-form/artifactIdversion3.8.0/version/dependency
2.配置契约
ApiRegisterConfig的Bean加一句.contract(new SpringContract())
对应bean代码如下 Beanpublic SojsonApiClient sojsonApiRegister() {return Feign.builder().encoder(new JacksonEncoder()).decoder(new JacksonDecoder()).requestInterceptor(new SojsonInterceptor()).contract(new SpringContract()).target(SojsonApiClient.class, sojsonRegisterUrl);}
3.改注解
将RequestLine注解改成GetMapping注解代码如下 GetMapping(value /api/weather/city/{id})//RequestLine(GET /api/weather/city/{id})WeatherVo getCityWeather(PathVariable(id) String id);
至此改造完成。
注意本文没有设置feign的全局拦截器因为在第三方接口中每种接口的鉴权方式不一样建议每种类型的接口单独设置拦截器做鉴权
