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一、创建服务注册中心

新建个主工程（这个pom文件作为父pom文件，起到依赖版本控制的作用，其他module工程继承该pom）并删除掉src目录

父pom.xml代码如下

   
       
    
     4.0.0
        
    
     com.example
        
    
     chapter1
        
    
     0.0.1-SNAPSHOT
        
    
     jar
        
    
     chapter1
        
    
     Demo project for Spring Boot
        
            
     
      org.springframework.boot
             
     
      spring-boot-starter-parent
             
     
      2.1.0.RELEASE
             
      
         
        
            
     
      eureka-server
             
     
      eureka-client
         
        
            
     
      UTF-8
             
     
      UTF-8
             
     
      1.8
             
     
      Greenwich.M1
         
        
            
                 
      
       org.springframework.boot
                  
      
       spring-boot-starter-web
              
             
                 
      
       org.springframework.boot
                  
      
       spring-boot-starter-test
                  
      
       test
              
         
        
            
                 
                      
       
        org.springframework.boot
                       
       
        spring-boot-maven-plugin
                   
              
         
    
   

二、创建eureka-server子工程（右键父工程 new module）

eureka-server pom.xml代码如下

   
       
    
     4.0.0
        
    
     eureka-server
        
    
     0.0.1-SNAPSHOT
        
    
     jar
        
    
     eureka-server
        
    
     Demo project for Spring Boot
        
            
     
      com.example
             
     
      chapter2
             
     
      0.0.1-SNAPSHOT
         
        
            
                 
      
       org.springframework.cloud
                  
      
       spring-cloud-starter-netflix-eureka-server
              
         
        
            
                 
                      
       
        org.springframework.cloud
                       
       
        spring-cloud-dependencies
                       
       
        ${spring-cloud.version}
                       
       
        pom
                       
       
        import
                   
                  
                  
                      
       
        org.springframework.boot
                       
       
        spring-boot-devtools
                       
       
        true
                   
              
         
        
            
                 
                      
       
        org.springframework.boot
                       
       
        spring-boot-maven-plugin
                   
              
         
        
            
                 
      
       spring-milestones
                  
      
       Spring Milestones
                  
      
       https://repo.spring.io/milestone
                  
                      
       
        false
                   
              
         
    
   

application.properties配置文件：

#服务启动端口server.port=8001#主机地址eureka.instance.hostname=localhost#这两个false表明这个服务为eureka servereureka.client.fetch-registry=falseeureka.client.register-with-eureka=false#服务地址eureka.client.service-url.defaultZone=http://${eureka.instance.hostname}:${server.port}/eureka/#服务名称spring.application.name=eureka-server

EurekaServerApplication 启动类：

package com.example;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;/** * @author xiaobu */@EnableEurekaServer@SpringBootApplicationpublic class EurekaServerApplication {    public static void main(String[] args) {        SpringApplication.run(EurekaServerApplication.class, args);    }}

输入界面如下所示：

三、在父工程右键新建一个eureka-client模块 选择 eureka-discovery

对应的pom.xml如下所示

   
       
    
     4.0.0
        
    
     eureka-client
        
    
     0.0.1-SNAPSHOT
        
    
     jar
        
    
     eureka-client
        
    
     eureka-client for Spring Boot
        
            
     
      com.example
             
     
      chapter1
             
     
      0.0.1-SNAPSHOT
         
        
            
     
      UTF-8
             
     
      UTF-8
             
     
      1.8
         
        
            
                 
      
       org.springframework.cloud
                  
      
       spring-cloud-starter-netflix-eureka-client
              
         
        
            
                 
                      
       
        org.springframework.cloud
                       
       
        spring-cloud-dependencies
                       
       
        ${spring-cloud.version}
                       
       
        pom
                       
       
        import
                   
              
         
        
            
                 
                      
       
        org.springframework.boot
                       
       
        spring-boot-maven-plugin
                   
              
         
        
            
                 
      
       spring-milestones
                  
      
       Spring Milestones
                  
      
       https://repo.spring.io/milestone
                  
                      
       
        false
                   
              
         
    
   

application.properties配置如下：

eureka.client.service-url.defaultZone=http://localhost:8001/eureka/server.port=8002spring.application.name=eureka-client

启动类EurekaClientApplication配置如下：

package com.example;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.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.RestController;/** * @author xiaobu */@EnableEurekaClient@RestController@SpringBootApplicationpublic class EurekaClientApplication {    public static void main(String[] args) {        SpringApplication.run(EurekaClientApplication.class, args);    }    @Value("${server.port}")    String port;    @RequestMapping("/test")    public String test(@RequestParam(value = "name", defaultValue = "admin") String name) {        return name +"test ,i am from port:" + port;    }}

启动eureka-client刷新http://localhost:8001 效果如下所示：

输入 效果图如下：

启动多个实例以及自动编译(修改端口，取消热编译)

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