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• 項目結構

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• sb_cloud_product

<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.huarui</groupId><artifactId>sb_cloud_product</artifactId><version>0.0.1-SNAPSHOT</version><name>sb_cloud_product</name><description>Demo project for Spring Boot</description><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>1.5.13.RELEASE</version><relativePath/> <!-- lookup parent from repository --></parent><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding><java.version>1.8</java.version><spring-cloud.version>Edgware.SR3</spring-cloud.version></properties><dependencies><!-- eureka client --><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-eureka</artifactId></dependency><!-- ribbon依賴 --><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-ribbon</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency></dependencies><dependencyManagement><dependencies><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-dependencies</artifactId><version>${spring-cloud.version}</version><type>pom</type><scope>import</scope></dependency></dependencies></dependencyManagement><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project> pom.xml server:port: 9000spring:application:name: sb-cloud-producteureka:client:serviceUrl:defaultZone: http://localhost:8761/eureka/ application.yml

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@SpringBootApplication @EnableDiscoveryClient //開啟服務注冊 @EnableFeignClients　　 //開啟Feign public class SbCloudProductApplication {
public static void main(String[] args) {SpringApplication.run(SbCloudProductApplication.class, args);}}

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• sb_cloud_order

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<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.huarui</groupId><artifactId>sb_cloud_order</artifactId><version>0.0.1-SNAPSHOT</version><name>sb_cloud_order</name><description>Demo project for Spring Boot</description><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>1.5.13.RELEASE</version><relativePath/> <!-- lookup parent from repository --></parent><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding><java.version>1.8</java.version><spring-cloud.version>Edgware.SR3</spring-cloud.version></properties><dependencies><!-- eureka client --><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-eureka</artifactId></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-feign</artifactId></dependency><!-- ribbon依賴 --><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-ribbon</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency></dependencies><dependencyManagement><dependencies><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-dependencies</artifactId><version>${spring-cloud.version}</version><type>pom</type><scope>import</scope></dependency></dependencies></dependencyManagement><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project> pom.xml server:port: 9001spring:application:name: sb-cloud-ordereureka:client:serviceUrl:defaultZone: http://localhost:8761/eureka/ application.yml

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@Configuration public class RestTemplateConfig {@Bean@LoadBalancedpublic RestTemplate restTemplate(){return new RestTemplate();}}

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@FeignClient(name = "sb-cloud-product") public interface ProductRemote {/*** name:遠程服務名，即spring.application.name配置的名稱*類中的方法和遠程服務中contoller中的方法名和參數(shù)需保持一致** @return*/@GetMapping(value = "/product/getMsg")public Map<String,String> getMsg(); }

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• RestTemplate三種訪問服務端口接口方法

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@RestController
@RequestMapping("/order")
public class OrderCtrl {

@Autowired
private LoadBalancerClient loadBalancerClient;

@Autowired
private RestTemplate restTemplate2;

@Autowired
private ProductRemote productRemote;

/**
* RestTemplate 三種使用方式
* @return
*/
@RequestMapping("/getProduct")
public Map<String,String> getProduct(){

//http://localhost:9000/product/getMsg

RestTemplate restTemplate = new RestTemplate();
//1.第一種方式(直接通過地址訪問)
//Map<String,String> map = restTemplate.getForObject("http://localhost:9000/product/getMsg", Map.class);

//2.第二種方式(利用loadBalancerClient通過應用名獲取url)
/*ServiceInstance serviceInstance = loadBalancerClient.choose("sb-cloud-product");
String url = String.format("http://%s:%s", serviceInstance.getHost(), serviceInstance.getPort() + "/product/getMsg");
Map<String,String> map = restTemplate.getForObject(url, Map.class);*/

//3.第三種方式(通過@LoadBalanced注解讓restTemplate獲得負載均衡能力 訪問接口時使用應用名字)
Map<String,String> map = restTemplate2.getForObject("http://sb-cloud-product:9000/product/getMsg", Map.class);

return map;

}


　　/* 通過feign 遠程訪問sb_cloud_product 服務 */
@GetMapping("/feign/getProduct")
public Map<String,String> feignGetProduct(){
return productRemote.getMsg();
}


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轉載于:https://www.cnblogs.com/youxiu326/p/Feign.html

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