从零搭建 Spring Cloud 服务（超级详细）

作者： Anakki；链接：blog.csdn.net/qq_29519041/article/details/85238270

这里会介绍很多基础知识，直接想开始搭建微服务的可以看第二章，微服务的搭建。直接看第二章不会有什么影响，可以先学会开车再学习车的构造的，看个人习惯来。

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>4.0.0modelVersion>
 
  <groupId>com.yungroupId>
  <artifactId>springcloud-eureka-serverartifactId>
  <version>1.0-SNAPSHOTversion>
 
  <name>springcloud-eureka-servername>
  
  <url>http://www.example.comurl>
 
  <properties>
    <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
    <maven.compiler.source>1.7maven.compiler.source>
    <maven.compiler.target>1.7maven.compiler.target>
  properties>
 
  
  <parent>
    <groupId>org.springframework.bootgroupId>
    <artifactId>spring-boot-starter-parentartifactId>
    <version>1.5.7.RELEASEversion>
  parent>
 
  <dependencies>
    
    <dependency>
      <groupId>org.springframework.cloudgroupId>
      <artifactId>spring-cloud-starter-netflix-eureka-serverartifactId>
    dependency>
 
  dependencies>
 
 
  
  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>org.springframework.cloudgroupId>
        <artifactId>spring-cloud-dependenciesartifactId>
        <version>Edgware.SR5version>
        <type>pomtype>
        <scope>importscope>
      dependency>
    dependencies>
  dependencyManagement>
project>

server:
  port: 8700 # 端口自己决定
  
# 指定当前eureka客户端的注册地址，也就是eureka服务的提供方，当前配置的服务的注册服务方
eureka:
  client:
    service-url:
      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka
    register-with-eureka: false #自身 不在向eureka注册
    fetch-registry: false #启动时禁用client的注册
  instance:
    hostname: localhost
 
#指定应用名称
spring:
  application:
    name: eureka-server

package com.yun;
 
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
 
@SpringBootApplication
@EnableEurekaServer //当前使用eureka的server
public class EurekaServerApplication {
    public static void main(String[] args) {
        SpringApplication.run(EurekaServerApplication.class,args);
    }
}

server:
  port: 8701 # 服务提供方
 
# 指定当前eureka客户端的注册地址,
eureka:
  client:
    service-url:
      defaultZone: http://${eureka.instance.hostname}:8700/eureka
  instance:
    hostname: localhost
 
#当前服务名称
spring:
  application:
    name: eureka-service

@RestController
@RequestMapping("/Hello")
public class Controller {
    @RequestMapping("/World")
    public String helloWorld(String s){
        System.out.println("传入的值为："+s);
        return "传入的值为："+s;
    }
}

@SpringBootApplication
@EnableDiscoveryClient//代表自己是一个服务提供方
public class EurekaServiceApplication {
    public static void main(String[] args) {
        SpringApplication.run(EurekaServiceApplication.class,args);
    }
}

<dependency>
       <groupId>org.springframework.cloudgroupId>
       <artifactId>spring-cloud-starter-ribbonartifactId>
dependency>

server:
  port: 8702 # 服务消费方
 
# 指定当前eureka客户端的注册地址,
eureka:
  client:
    service-url:
      defaultZone: http://${eureka.instance.hostname}:8700/eureka
  instance:
    hostname: localhost
 
#当前服务名称
spring:
  application:
    name: eureka-consumer

@SpringBootApplication
@EnableDiscoveryClient //当前使用eureka的server
public class EurekaConsumerApplication {
    public static void main(String[] args) {
        SpringApplication.run(EurekaConsumerApplication.class,args);
    }
}

@RestController
@RequestMapping("/Hello")
class ConsumerController {
    @Autowired
    private LoadBalancerClient loadBalancerClient;
    @Autowired
    private RestTemplate restTemplate;
    @RequestMapping("/Consumer")
    public String helloWorld(String s){
        System.out.println("传入的值为："+s);
        //第一种调用方式
        //String forObject = new RestTemplate().getForObject("http://localhost:8071/Hello/World?s=" + s, String.class);
 
        //第二种调用方式
        //根据服务名 获取服务列表 根据算法选取某个服务 并访问某个服务的网络位置。
        //ServiceInstance serviceInstance = loadBalancerClient.choose("EUREKA-SERVICE");
        //String forObject = new RestTemplate().getForObject("http://"+serviceInstance.getHost()+":"+serviceInstance.getPort()+"/Hello/World?s="+s,String.class);
 
        //第三种调用方式 需要restTemplate注入的方式
        String forObject = restTemplate.getForObject("http://EUREKA-SERVICE/Hello/World?s=" + s, String.class);
        return forObject;
    }
}

@Configuration
public class Beans {
    //管理简单对象
    @Bean
    @LoadBalanced
    public RestTemplate getRestTemplate(){
        return new RestTemplate();
    }
}