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SpringCloud Service-consumer

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本文字数： 338 阅读时长 ≈ 1 分钟

pom.xml

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 <dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>

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

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

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

application.yml

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server:
  port: 7004

eureka:
  instance:
    hostname: localhost
  client:
    serviceUrl:
      defaultZone: http://localhost:7001/eureka/  #注册中心的地址

spring:
  application:
    name: service-consumer  #服务的名字

Ribbon

RibbonService.java
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package com.linjian.serviceconsumer.service;

/**
 * RibbonService
 *
 * @author jlin
 * @date 2019/3/19 22:23
 * @Description
 */
public interface RibbonService {

    /**
     * say hello
     *
     * @param name
     * @return
     */
    String hello(String name);
}
RibbonServiceImpl.java
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package com.linjian.serviceconsumer.service.impl;

import com.linjian.serviceconsumer.service.RibbonService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.client.RestTemplate;

/**
 * RibbonServiceImpl
 *
 * @author jlin
 * @date 2019/3/19 22:23
 * @Description
 */
@Service
public class RibbonServiceImpl implements RibbonService {
    @Autowired
    RestTemplate restTemplate;

    /**
     * say hello
     *
     * @param name
     * @return
     */
    @Override
    public String hello(String name) {
        return restTemplate.getForObject("http://service-producer/hello?name=" + name, String.class);
    }
}

Feign

FeignExampleService.java
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package com.linjian.serviceconsumer.service;

import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;

/**
 * FeignExampleService
 *
 * @author jlin
 * @date 2019/3/20 10:40
 * @Description
 */
@FeignClient(value = "service-producer")
public interface FeignExampleService {

    @GetMapping("hello")
    public String hello(@RequestParam(value = "name") String name);
}
启动类
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package com.linjian.serviceconsumer;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;

@SpringBootApplication
@EnableDiscoveryClient
@EnableFeignClients
@EnableEurekaClient
public class ServiceConsumerApplication {

    public static void main(String[] args) {
        SpringApplication.run(ServiceConsumerApplication.class, args);
    }

    /**
     * LoadBalanced 注解表明restTemplate使用LoadBalancerClient执行请求
     */
    @Bean
    @LoadBalanced
    RestTemplate restTemplate() {
        return new RestTemplate();
    }
}
ConsumerController.java
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package com.linjian.serviceconsumer.controller;

import com.linjian.serviceconsumer.service.FeignExampleService;
import com.linjian.serviceconsumer.service.impl.RibbonServiceImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;


/**
 * ConsumerController
 *
 * @author jlin
 * @date 2019/3/19 22:22
 * @Description
 */
@RestController
public class ConsumerController {
    @Resource
    private FeignExampleService feignExampleService;

    @Autowired
    RibbonServiceImpl ribbonServiceImpl;

    @GetMapping("/hello/{name}")
    public String hello(@PathVariable("name") String name) {
        return ribbonServiceImpl.hello(name);
    }

    @GetMapping("/helloFeign/{name}")
    public String helloFeign(@PathVariable("name") String name) {
        return feignExampleService.hello(name);
    }

}

启动eureka-server、service-producer、service-consumer

调用http://localhost:7004/hello/linjian

http://localhost:7004/helloFeign/linjian