從零搭建SpringCloud服務(wù)（超級(jí)詳細(xì)）

來源：blog.csdn.net/qq_29519041

這里會(huì)介紹很多基礎(chǔ)知識(shí)，直接想開始搭建微服務(wù)的可以看第二章，微服務(wù)的搭建。直接看第二章不會(huì)有什么影響，可以先學(xué)會(huì)開車再學(xué)習(xí)車的構(gòu)造的，看個(gè)人習(xí)慣來。

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?# 端口自己決定
??
# 指定當(dāng)前eureka客戶端的注冊(cè)地址，也就是eureka服務(wù)的提供方，當(dāng)前配置的服務(wù)的注冊(cè)服務(wù)方
eureka:
??client:
????service-url:
??????defaultZone:?http://${eureka.instance.hostname}:${server.port}/eureka
????register-with-eureka: false #自身 不在向eureka注冊(cè)
????fetch-registry: false #啟動(dòng)時(shí)禁用client的注冊(cè)
??instance:
????hostname: localhost
?
#指定應(yīng)用名稱
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?//當(dāng)前使用eureka的server
public?class?EurekaServerApplication?{
????public?static?void?main(String[] args)?{
????????SpringApplication.run(EurekaServerApplication.class,args);
????}
}

server:
??port:?8701?# 服務(wù)提供方
?
# 指定當(dāng)前eureka客戶端的注冊(cè)地址,
eureka:
??client:
????service-url:
??????defaultZone:?http://${eureka.instance.hostname}:8700/eureka
??instance:
????hostname: localhost
?
#當(dāng)前服務(wù)名稱
spring:
??application:
????name: eureka-service

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

@SpringBootApplication
@EnableDiscoveryClient//代表自己是一個(gè)服務(wù)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?# 服務(wù)消費(fèi)方
?
# 指定當(dāng)前eureka客戶端的注冊(cè)地址,
eureka:
??client:
????service-url:
??????defaultZone:?http://${eureka.instance.hostname}:8700/eureka
??instance:
????hostname: localhost
?
#當(dāng)前服務(wù)名稱
spring:
??application:
????name: eureka-consumer

@SpringBootApplication
@EnableDiscoveryClient?//當(dāng)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("傳入的值為："+s);
????????//第一種調(diào)用方式
????????//String forObject = new RestTemplate().getForObject("http://localhost:8071/Hello/World?s=" + s, String.class);
?
????????//第二種調(diào)用方式
????????//根據(jù)服務(wù)名 獲取服務(wù)列表 根據(jù)算法選取某個(gè)服務(wù) 并訪問某個(gè)服務(wù)的網(wǎng)絡(luò)位置。
????????//ServiceInstance serviceInstance = loadBalancerClient.choose("EUREKA-SERVICE");
????????//String forObject = new RestTemplate().getForObject("http://"+serviceInstance.getHost()+":"+serviceInstance.getPort()+"/Hello/World?s="+s,String.class);
?
????????//第三種調(diào)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 {
????//管理簡(jiǎn)單對(duì)象
????@Bean
????@LoadBalanced
????public RestTemplate getRestTemplate(){
????????return?new?RestTemplate();
????}
}