SpringCloud使用Feign實現動態路由操作
一、理解及原理
1.1理解
Feign
基於接口 + 註解的方式,一個http請求調用的輕量級框架
Feign是Netflix開發的聲明式、模板化的HTTP客戶端, Feign可以幫助我們更快捷、優雅地調用HTTP API。
Feign是一種聲明式、模板化的HTTP客戶端(僅在Application Client中使用)。聲明式調用是指,就像調用本地方法一樣調用遠程方法,無需感知操作遠程http請求
1.2原理
二、Feign搭建實現步驟
- 創建Springboot基礎項目
- 在註冊中心(Eureka)配置的基礎上,進行配置Feign
三、配置文件(pom.xml)
基礎配置:
<dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-openfeign</artifactId> </dependency>
整體:
<dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> <version>RELEASE</version> <scope>compile</scope> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId> </dependency> <dependency> <groupId>org.freemarker</groupId> <artifactId>freemarker</artifactId> <version>2.3.30</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jdbc</artifactId> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <scope>runtime</scope> </dependency> <!-- Swagger --> <dependency> <groupId>io.springfox</groupId> <artifactId>springfox-swagger-ui</artifactId> <version>2.4.0</version> </dependency> <dependency> <groupId>io.springfox</groupId> <artifactId>springfox-swagger2</artifactId> <version>2.4.0</version> </dependency> <dependency> <groupId>com.github.xiaoymin</groupId> <artifactId>swagger-bootstrap-ui</artifactId> <version>1.8.7</version> </dependency> <!--添加lombok--> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>RELEASE</version> <scope>compile</scope> </dependency> <dependency> <groupId>com.google.guava</groupId> <artifactId>guava</artifactId> <version>20.0</version> </dependency> <dependency> <groupId>com.google.guava</groupId> <artifactId>guava</artifactId> <version>19.0</version> <scope>compile</scope> </dependency> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.3.2</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> <!--pagehelper分頁--> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper-spring-boot-starter</artifactId> <version>1.2.11</version> </dependency> <dependency> <groupId>commons-codec</groupId> <artifactId>commons-codec</artifactId> <version>1.11</version> </dependency> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.6</version> </dependency> <dependency> <groupId>com.google.code.gson</groupId> <artifactId>gson</artifactId> <version>2.8.6</version> </dependency> <!--驗證碼https://blog.csdn.net/qq_41853447/article/details/105893567--> <dependency> <groupId>com.github.whvcse</groupId> <artifactId>easy-captcha</artifactId> <version>1.6.2</version> </dependency> <!--security權限管理--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-security</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-openfeign</artifactId> </dependency> </dependencies>
四、程序代碼
在啟動類上加上@EnableFeignClients,開啟Feign的應用
@EnableEurekaServer @EnableSwagger2 @SpringBootApplication @EnableFeignClients(basePackages = "com.personal.pserver") public class PserverApplication { public static void main(String[] args) { SpringApplication.run(PserverApplication.class, args); System.out.println("========================person-server已啟動========================"); } }
啟動類添加完成之後,在指定需要訪問的service註冊使用,
見其他博主講解:
在通過Feign來實現遠程服務調用時,需要提供一個本地接口來繼承服務標準工程提供的服務接口。這個本地接口不需要給予任何實現,在底層Spring容器會為這個接口提供一個基於JDK實現的代理對象,這個代理對象由Feign技術提供具體的HandlerInterceptor邏輯,實現遠程的調用。實現過程類似通過代碼調用LoadBalancerClient實現的Rest遠程訪問。
而本地接口繼承服務標準接口後,需要提供註解@FeignClient,註解的屬性name代表當前接口要調用的遠程服務的應用命名。
@RestController @Api(tags = "平臺基本信息管理") @RequestMapping("/v1/pserver/platform/manager") public class PlatformController { @Autowired private PPlatformService platformService; @ApiOperation(value = "獲取平臺基本信息", notes = "獲取平臺基本信息", httpMethod = "GET") @RequestMapping(value = "/findPlatformInfo",method = RequestMethod.GET) public PPlatform findPlatformInfo(@RequestParam("platformId") String platformId) { PPlatform pPlatform = platformService.findOnePlatformById(platformId); return pPlatform; } }
@FeignClient(name="p-platform-service") public interface PPlatformService { /*** * 獲取平臺基本信息 * @param platformId * @return */ @RequestMapping(value="/findPlatformInfo",method = RequestMethod.GET) PPlatform findOnePlatformById(@RequestParam(value="platformId") String platformId); }
五、結果演示
到此這篇關於SpringCloud使用Feign實現動態路由操作的文章就介紹到這瞭,更多相關Feign動態路由內容請搜索WalkonNet以前的文章或繼續瀏覽下面的相關文章希望大傢以後多多支持WalkonNet!
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