上一个文章介绍了如何搭建一个 消费者 eureka client，如何注册到server，这篇文章介绍如何消费。

一般情况下有2种方式：一种是ribbon+restTemplate，另一种是feign，来调用服务

1、 ribbon+restTemplate

这里需要注意的就是负载均衡

2、feign

2.1、pom.xml添加openfeign

<?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">
    <parent>
        <groupId>cn.dails</groupId>
        <artifactId>dails-parent</artifactId>
        <version>1.0-SNAPSHOT</version>
        <relativePath></relativePath>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>dms-asset</artifactId>
    <name>dms-asset 客户资产</name>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>
    <dependencies>
        <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-openfeign</artifactId>
        </dependency>
    </dependencies>

    <build>
        <finalName>dms-asset</finalName>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

2.2、添加一个接口FeignClient

package cn.dms.service.feignClient;

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

@FeignClient(value = "dms-user")
public interface UserService {

    @RequestMapping(value = "/user/private/findUser",method = RequestMethod.GET)
    String findUser(@RequestParam(value = "name") String name);
}

2.3、启动类添加@EnableFeignClients

package cn.dms;

import cn.dms.service.feignClient.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.openfeign.EnableFeignClients;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication
@EnableEurekaClient
@EnableFeignClients
@RestController
public class AssetApplication {

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

    @Value("${server.port}")
    String port;

    @Autowired
    UserService userInterface;

    @RequestMapping("/hello")
    public String home(@RequestParam(value = "name", defaultValue = "屌丝") String name) {
        return userInterface.findUser("屌丝");
    }
}