springcloud(二)服务的消费者(eureka)

服务的消费者

1.启动eureka-server跟provider（参考我的上一篇文章springcloud(一)服务的注册与治理(eureka)）

2.新建一个springboot工程

选中以下模块

pom文件详情如下

<?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.janhe</groupId>
	<artifactId>consumer1</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>consumer1</name>
	<description>Demo project for Spring Boot</description>

	<properties>
		<java.version>1.8</java.version>
		<spring-cloud.version>Greenwich.SR1</spring-cloud.version>
	</properties>

	<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>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-openfeign</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>

	
		<dependency>
			<groupId>com.netflix.hystrix</groupId>
			<artifactId>hystrix-javanica</artifactId>
			<version>RELEASE</version>
		</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>

3.书写项目核心配置文件

详细配置如下

    eureka:
      client:
        serviceUrl:
          defaultZone: http://localhost:9000/eureka/
    server:
      port: 8050
    spring:
      application:
        name: serice-custum

``

4.测试

1.编写接口.

package com.janhe.consumer1.service;

import com.janhe.consumer1.service.Hystrix.HelloServiceFeedBack;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;

@FeignClient(value = "service-provider")//指定服务的提供者
@Service
public interface HelloService {

     @RequestMapping(value = "/hello", method = RequestMethod.GET)
     String sayHiFromClientOne(@RequestParam(value = "name") String name);


}

2.编写控制器

package com.janhe.consumer1.controller;

import com.janhe.consumer1.service.HelloService;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

/**
 * @Auther: Jan 
 * @Date: 2019-4-1 10:01
 * @Description:
 */
@RestController
public class HelloController {

    @Autowired
    HelloService helloService;
    @Autowired
    RestTemplate restTemplate;

    @RequestMapping(value = "/hi", method = RequestMethod.GET)

    public String sayHi(@RequestParam String name) {
        return helloService.sayHiFromClientOne(name);
    }


}

3.启动测试

http://localhost:8050/hi?name=bbb

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