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SpringCloud-Eureka

news 来源：原创 2024/5/21 6:07:46

父工程

<!--SpringCloud-->
<dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-dependencies</artifactId><version>Greenwich.SR1</version>
</dependency>
<!--SpringBoot-->
<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-dependencies</artifactId><version>2.1.4.RELEASE</version><type>pom</type><scope>import</scope>
</dependency>
</project>

eureka 注册中心

依赖

<dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-eureka-server</artifactId><version>1.4.6.RELEASE</version>
</dependency>

启动类开启Eureka服务端@EnableEurekaServer
配置信息

server:port: 7001
# Eureka
eureka:instance:# Eureka服务端的实例名称hostname: localhostclient:# false表示不向Eureka注册自己register-with-eureka: false# false表示自己是注册中心fetch-registry: falseservice-url:# 单机：defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/# 集群（配置要关联的eureka客户端）defaultZone: http://eureka7002:7002/eureka/,http://eureka7003:7003/eureka/

主机名称配置文件：C:\Windows\System32\drivers\etc\hosts “ip 名称”

服务提供者

依赖

<!--eureka-->
<dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-eureka</artifactId><version>1.4.6.RELEASE</version>
</dependency>
<!--监控-->
<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<!--实体类-->

配置信息

server:port: 8081
mybatis:# 别名配置type-aliases-package: com.example.pojo# 配置类的位置config-location: classpath:mybatis/mybatis-config.xml# 扫描映射文件mapper-locations: classpath:mybatis/mapper/*.xml
spring:application:name: springcloud-provider-deptdatasource:username: rootpassword: rooturl: jdbc:mysql://localhost:3306/spring_cloud?useSSL=true&useUnicode=true&charsetEncoding=UTF-8&serverTimezone=UTCdriver-class-name: com.mysql.jdbc.Driver
# eureka
eureka:# 客户端注册client:service-url: # 注册到哪里defaultZone: http://eureka7001:7001/eureka/,http://eureka7002:7002/eureka/,http://eureka7003:7003/eureka/instance:# 设置客户端实例的访问链接描述instance-id: springcloud-provider-dept-8081
# 客户端info配置
info:# 访问 localhost:8081/actuator/info 得到json数据：{"app":{"name":"部门信息"}}app.name: 部门信息

启动类添加注解
开启Eureka@EnableEurekaClient
服务发现@EnableDiscoveryClient

import org.springframework.cloud.client.discovery.DiscoveryClient;
// 获取配置信息，得到具体的微服务等
@Autowired
private DiscoveryClient client;
@GetMapping("/discovery")
public Object discovery(){// 获取微服务列表List<String> services = client.getServices();// 获取具体的微服务的信息List<ServiceInstance> instances = client.getInstances("springcloud-provider-dept");return client;
}

消费者

引入实体类模块的依赖
配置端口号
添加配置类

@Configuration
public class ConfigBean {@Beanpublic RestTemplate restTemplate(){return new RestTemplate();}
}

无需引入远程服务，直接通过http请求，通过 RestTemplate 实现

@RestController
@RequestMapping("/consumer/dept")
public class DeptController {@Autowiredprivate RestTemplate restTemplate;@GetMapping("/query/{deptNo}")public Dept queryByDeptNo(@PathVariable("deptNo") Long deptNo){return restTemplate.getForObject("http://localhost:8081/dept/query/" + deptNo, Dept.class);}
}