SpringCloud 之服务提供者

前提

便于理解,我修改了本地域名=》这里!!!

127.0.0.1 eureka7001.com
127.0.0.1 eureka7002.com
127.0.0.1 eureka7003.com

学习Rest实例之提供者

在这里插入图片描述

提供者模块展示

1、导入依赖

<!--        实体类 + Web-->
 <dependency>
      <groupId>com.jyl</groupId>
      <artifactId>springcloud-api</artifactId>
      <version>1.0-SNAPSHOT</version>
  </dependency>
  <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
  </dependency>
  <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
  </dependency>
  <dependency>
      <groupId>ch.qos.logback</groupId>
      <artifactId>logback-core</artifactId>
  </dependency>
  <dependency>
      <groupId>org.mybatis.spring.boot</groupId>
      <artifactId>mybatis-spring-boot-starter</artifactId>
  </dependency>
  <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
  </dependency>
  <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-test</artifactId>
  </dependency>
  <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-jetty</artifactId>
  </dependency>
<!--        热部署-->
  <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-devtools</artifactId>
  </dependency>
  <!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-eureka -->
  <!-- eureka       -->
  <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-eureka</artifactId>
      <version>1.4.6.RELEASE</version>
  </dependency>
<!--        解决 eureka Status  actuator/info 完善监控信息-->
  <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-actuator</artifactId>
  </dependency>

2、application.yml 用户级配置文件

配置端口号、mybatis配置、spring配置、eureka配置、监控信息配置

server:
  port: 8001
# mybatis 配置

mybatis:
  type-aliases-package: com.jyl.springcloud.pojo
  config-location: classpath:mybatis/mybatis-config.xml
  mapper-locations: classpath:mapper/*.xml

# spring 的配置

spring:
  application:
    name: springcloud-provider-dept
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: org.gjt.mm.mysql.Driver
    url: jdbc:mysql://localhost:3306/db01?useUnicode=true&useSSL=false&characterEncoding=utf-8
    username: root
    password: root
    druid:
      test-while-idle: false  # 关闭空闲检测

eureka:
  client:
    service-url:  #       替换源码 默认this.serviceUrl.put("defaultZone", "http://localhost:8761/eureka/");
      # 端口号 7001 7002 7003  ，实际工作中是3台不同的电脑域名或IP
      defaultZone: http://eureka7001.com:7001/eureka/,http://eureka7002.com:7002/eureka/,http://eureka7002.com:7003/eureka/
  instance:
    instance-id: springcloud-provider-dept8001  # 修改eureka 上	Status默认描述信息

# 导入 actuator
info:
  app.name: jiangyl-springcloud8001
  company.name: jiang.yl.com

3、Controller层

通过DiscoveryClient的API从注册中心获取其他已经注册的服务的信息

@RestController
public class DeptController {
    @Autowired
    private DeptService deptService;
    // 可以获取服务列表 
    @Autowired
    private DiscoveryClient client;

    @PostMapping("/dept/add")
    public boolean addDept(Dept dept){
        return deptService.addDept(dept);
    }
    @GetMapping("/dept/get/{id}")
    public Dept get(@PathVariable("id") Long id){
        return deptService.queryById(id);
    }
    @GetMapping("/dept/list")
    public List<Dept> qeuryAll(){
        return deptService.queryAll();
    }

    // 还需要在启动类中添加 @EnableDiscoveryClient  服务发现  用于团队协助
    @GetMapping("/dept/discovery")
    //注册进来的微服务  ， 获取一些信息
    public Object discovery(){
        // 获取微服务列表的清单
        List<String> services = client.getServices();
        System.out.println("discovery->services = " + services);
        // Eureka 中Application iD
        List<ServiceInstance> instances = client.getInstances("SPRINGCLOUD-PROVIDER-DEPT");
        for (ServiceInstance instance : instances) {
            System.out.println(
                    instance.getHost()+"\t"+
                    instance.getUri()+"\t"+
                    instance.getPort()+"\t"+
                    instance.getServiceId());
        }
        return this.client;
    }
}

4、service层

public interface DeptService {
    public boolean addDept(Dept dept);
    public Dept queryById(Long id);
    public List<Dept> queryAll();
    
}

5、启动类

@EnableDiscoveryClient

@SpringBootApplication
@EnableEurekaClient  // 自动在服务启动后自动注册到Eureka中
@EnableDiscoveryClient // 服务发现
public class SpringBootProviderApplication_8001 {
    public static void main(String[] args) {
        SpringApplication.run(SpringBootProviderApplication_8001.class,args);
    }
}

测试结果展示

前提是先启动eureka集群

测试1

访问eureka服务 http://localhost:7001/可以查看到注册的提供者信息名称为SPRINGCLOUD-PROVIDER-DEPT

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eureka默认界面

测试2

访问服务提供者接口 http://localhost:8001/dept/list

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提供者list

测试3

访问http://localhost:8001/dept/discovery

在这里插入图片描述控制台输出

discovery->services = [springcloud-provider-dept]
[本机用户名]	http://[本机用户名]:8001	8001	SPRINGCLOUD-PROVIDER-DEPT
discovery->services = [springcloud-provider-dept]
[本机用户名]	http://[本机用户名]:8001	8001	SPRINGCLOUD-PROVIDER-DEPT