SpringCloud 之服务提供者-编程知识

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.pojoconfig-location: classpath:mybatis/mybatis-config.xmlmapper-locations: classpath:mapper/*.xml# spring 的配置spring:application:name: springcloud-provider-deptdatasource:type: com.alibaba.druid.pool.DruidDataSourcedriver-class-name: org.gjt.mm.mysql.Driverurl: jdbc:mysql://localhost:3306/db01?useUnicode=true&useSSL=false&characterEncoding=utf-8username: rootpassword: rootdruid: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IPdefaultZone: 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-springcloud8001company.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 {@Autowiredprivate DeptService deptService;// 可以获取服务列表 @Autowiredprivate 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 iDList<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

在这里插入图片描述

eureka默认界面

测试2

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

在这里插入图片描述

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