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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>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.zws.cloud</groupId>
<artifactId>Eurka-Producer</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>Eurka-Producer</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Greenwich.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- Eureka 客户端依赖 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
server:
port: 8080
eureka:
client:
serviceUrl:
defaultZone: http://localhost:8761/eureka/
spring:
application:
name: Eureka-Producer
package com.zws.cloud.producer;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
/**
* @Author wensh.zhu
* @Date 2019/2/16 19:33
*/
@RestController
public class HelloController {
@GetMapping("/hello")
public String hello() {
return "hello";
}
}
启动
package com.zws.cloud.producer;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class EurekaProducerApplication {
public static void main(String[] args) {
SpringApplication.run(EurekaProducerApplication.class, args);
}
}
<?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>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.zws.cloud</groupId>
<artifactId>Eurka-Producer</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>Eurka-Producer</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Greenwich.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<!-- Ribbon用于客户端负载均衡 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
</dependency>
<!-- Feign用于服务发现与调用 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
server:
port: 8088
eureka:
client:
serviceUrl:
defaultZone: http://localhost:8761/eureka/
spring:
application:
name: Eureka-Consumer
package com.zws.cloud.consumer;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
/**
* @Author wensh.zhu
* @Date 2019/2/16 15:14
*/
@FeignClient(value = "Eureka-Producer", fallbackFactory = HelloClientFallbackFactory.class)
public interface HelloClient {
@GetMapping("/hello")
String hello();
}
package com.zws.cloud.consumer;
import feign.hystrix.FallbackFactory;
import org.springframework.stereotype.Component;
/**
* @Author wensh.zhu
* @Date 2019/2/16 16:12
*/
@Component
public class HelloClientFallbackFactory implements FallbackFactory<String>, HelloClient {
@Override
public String create(Throwable throwable) {
return this.hello();
}
@Override
public String hello() {
return "";
}
}
@FeignClient(value = "Eureka-Producer", fallbackFactory = HelloClientFallbackFactory.class)其中Eurka-Producer为服务提供方的实例名称(spring.application.name)
package com.zws.cloud.EurkaProducer;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.openfeign.EnableFeignClients;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.annotation.Resource;
@RestController
@EnableFeignClients
@SpringBootApplication
public class EurkaProducerApplication {
@Resource
private HelloFeign helloFeign;
public static void main(String[] args) {
SpringApplication.run(EurkaProducerApplication.class, args);
}
@GetMapping("/hello")
public String hello() {
return helloFeign.hello();
}
}
服务发布主要涉及如下三个方面:
## 多个以逗号隔开
eureka:
client:
serviceUrl:
defaultZone: http://peer1:8761/eureka/
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
服务调用:
<!-- Eureka客户端 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<!-- Ribbon用于负载均衡 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
</dependency>
<!-- Feign用于服务发布与调用 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
eureka:
client:
serviceUrl:
defaultZone: http://localhost:8762/eureka/
@EnableFeignClients会把第三步定义的接口注入Spring上下文中 ,然后使用的时候直接注入即可。
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