需要搭建一个lj_ovls_eureka_server
搭建2个 lj_ovls_paper_server ，lj_user_server ，这样才可以看到效果
源码：
https://gitee.com/qq1350048638/lj_ovls_paper_server

https://gitee.com/qq1350048638/lj_user_server

https://gitee.com/qq1350048638/lj_ovls_eureka_server

公共包 ：https://gitee.com/qq1350048638/lj_common

另前端界面
https://gitee.com/qq1350048638/lj_study_web/

eclipse各工程结构图

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lj_ovls_eureka_server目录结构

pom.xml

 <!-- springboot-parent -->
  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.4.7.RELEASE</version>
    <relativePath/>
  </parent>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.7</java.version>
  </properties>

  <dependencies>
    <!-- springcloud-eureka-server -->
    <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-eureka-server</artifactId>
      <version>1.3.4.RELEASE</version>
    </dependency>

  </dependencies>

  <!-- springcloud-parent -->
  <dependencyManagement>
    <dependencies>
        <dependency>
          <groupId>org.springframework.cloud</groupId>
          <artifactId>spring-cloud-starter-parent</artifactId>
          <version>Brixton.SR5</version>
          <type>pom</type>
        </dependency>
    </dependencies>
  </dependencyManagement>

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EurekaServerBootApplication 启动类

package com.lj.ovls;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;

@EnableEurekaServer//启用eureka服务器
@SpringBootApplication
public class EurekaServerBootApplication {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        SpringApplication.run(EurekaServerBootApplication.class, args);
    }

}

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lj_ovls_paper_server工程结构

pom.xml
springcloud-ribbon springcloud-feign 2种方式

 <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.4.7.RELEASE</version>
    <relativePath/>
  </parent>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.7</java.version>
  </properties>

  <dependencies>

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


        <dependency>
            <groupId>com.lj</groupId>
            <artifactId>lj_common</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </dependency>

                 <!-- springcloud-eureka -->
        <dependency>
          <groupId>org.springframework.cloud</groupId>
          <artifactId>spring-cloud-starter-eureka</artifactId>
          <version>1.3.4.RELEASE</version>
        </dependency>
        <!-- springcloud-ribbon -->
        <dependency>
          <groupId>org.springframework.cloud</groupId>
          <artifactId>spring-cloud-starter-ribbon</artifactId>
          <version>1.3.4.RELEASE</version>
        </dependency>

        <!-- springcloud-feign -->
        <dependency>
          <groupId>org.springframework.cloud</groupId>
          <artifactId>spring-cloud-starter-feign</artifactId>
          <version>1.3.4.RELEASE</version>
        </dependency>

  </dependencies>

        <!-- springcloud-parent -->
  <dependencyManagement>
    <dependencies>
        <dependency>
          <groupId>org.springframework.cloud</groupId>
          <artifactId>spring-cloud-starter-parent</artifactId>
          <version>Brixton.SR5</version>
          <type>pom</type>
        </dependency>
    </dependencies>
  </dependencyManagement>

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PaperServiceBootApplication 启动类
@EnableFeignClients
@EnableDiscoveryClient 注入

package com.lj.ovls;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletComponentScan;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.netflix.feign.EnableFeignClients;

@EnableFeignClients
@EnableDiscoveryClient
@SpringBootApplication
@ServletComponentScan
@MapperScan(basePackages={"com.lj.ovls.paper.dao"})
public class PaperServiceBootApplication {

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

}

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使用RestTemplate(ribbon负载)
package com.lj.ovls.paper.config;

@Configuration
public class RestTemplateConfig {

    @Bean
    @LoadBalanced//启用ribbon负载均衡调用服务
    public RestTemplate cteateRestTemplate(){
        return new RestTemplate();
    }

}

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注入RestTemplate，调用eureka服务
USERSERVER 是application.properties里面设置的，相当于localhost:8881

@Autowired
private RestTemplate restTemplate;

ResponseResult userResult  = restTemplate.getForObject(
    "http://USERSERVER/user/token?token="+token, ResponseResult.class);

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application.properties
里面设置paper_server 服务器的别名
相当于 localhost:8884 通过eureka服务器 对应的 别名 paperserver 即可访问

server.port=8884
#eureka
spring.application.name=paperserver
eureka.client.serviceUrl.defaultZone=http://localhost:2222/eureka

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feign模式
pom.xml 前面已经设置了

定义一个Fegin远程调用接口

package com.lj.ovls.paper.remote;

import org.springframework.cloud.netflix.feign.FeignClient;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import com.lj.ovls.common.entity.ResponseResult;

@FeignClient(name="USERSERVER")//对应哪个服务实例
public interface UserServiceRemote {

    //调用/user/token服务
    @RequestMapping(value="/user/token",method=RequestMethod.GET)
    public ResponseResult checkToken(String token);

}

提示：@FeignClient(name=”注册中心服务实例名”)，@RequestMapping请求定义跟UserController入口定义相同

注入Feign远程接口对象，使用服务

@Autowired
private UserServiceRemote userRemote;

//利用Remote对象调用服务
ResponseResult userResult = userRemote.checkToken(token);

在主入口启动类前追加@EnableFeignClients标记 前面已经设置

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