一、eureka：服务注册 1、服务端（先启动） 1、pom.xml <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId> </dependency> 2、application.yml server: port: 8081 spring: application: name: EurekaServer eureka: client: register-with-eureka: false #Eureka服务本身无需注册 fetch-registry: false #Eureka服务本身无需获取注册信息 service-url: defaultZone: http://127.0.0.1:${server.port}/eureka/ 3、启动类 @SpringBootApplication @EnableEurekaServer public class MyEurekaServer { public static void main(String[] args) { SpringApplication.run(MyEurekaServer.class); } } 2、客户端 1、pom.xml <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> 2、application.yml server: port: 8082 spring: application: name: EurekaClient eureka: client: service-url: defaultZone: http://127.0.0.1:8081/eureka/ instance: prefer-ip-address: true #跨域 3、启动类 @SpringBootApplication @EnableEurekaClient public class MyEurekaClient { public static void main(String[] args) { SpringApplication.run(MyEurekaClient.class); } } 二、feign：服务间调用，有负载均衡功能，要在eureka服务下 1、被调用方不用动代码（@ResponseBody返回值不能是Object） 2、调用方 1、pom.xml <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-openfeign</artifactId> </dependency> 2、feign接口（调用方直接调接口的方法，即可实现服务间调用） @FeignClient("EurekaClientA") public interface AFeign { @RequestMapping(value = "/a/amethod/{id}") Msg ametohd(@PathVariable("id") Integer id); } 3、启动类 @SpringBootApplication @EnableEurekaClient @EnableDiscoveryClient @EnableFeignClients public class MyEurekaClientB { public static void main(String[] args) { SpringApplication.run(MyEurekaClientB.class); } } 三、hystrix：熔断器，要在eureka服务下 1、被调用方不用动代码 2、调用方 1、application.yml feign: hystrix: enabled: true 2、feign接口 @FeignClient(value = "EurekaClientA", fallback = AFeignImpl.class) public interface AFeign { @RequestMapping(value = "/a/amethod/{id}") Msg ametohd(@PathVariable("id") Integer id); } 3、实现feign接口（被调用方停止服务，即会调用熔断器方法，被调用方重新提供服务，即会重新调用所提供的的服务） @Component public class AFeignImpl implements AFeign { @Override public Msg ametohd(Integer id) { return Msg.fail().add("branch", "熔断器触发"); } } 四、zuul：网关，要在eureka服务下 1、步骤 1、pom.xml <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-zuul</artifactId> </dependency> 2、application.yml zuul: routes: EurekaClientA: path: /a/** serviceId: EurekaClientA #服务名 3、启动类 @SpringBootApplication @EnableEurekaClient @EnableZuulProxy public class MyEurekaClient { public static void main(String[] args) { SpringApplication.run(MyEurekaClient.class); } } 2、网关过滤器和请求头丢失问题 @Component public class MyEurekaClientFilter extends ZuulFilter { /** * 在请求前pre或者后post执行 * * @return */ @Override public String filterType() { return "pre"; } /** * 多个过滤器的执行顺序，数字越小，表示越先执行 * * @return */ @Override public int filterOrder() { return 0; } /** * 当前过滤器是否开启true表示开启 * * @return */ @Override public boolean shouldFilter() { return true; } /** * 过滤器内执行的操作 return任何object的值都表示继续执行 * RequestContext.getCurrentContext().setSendZuulResponse(false)表示不再继续执行 * * @return * @throws ZuulException */ @Override public Object run() throws ZuulException { RequestContext requestContext = RequestContext.getCurrentContext(); HttpServletRequest request = requestContext.getRequest(); String header = request.getHeader("token"); if (header != null && !"".equals(header)) { //Authorization、Cookie、Set-Cookie不会转发 requestContext.addZuulRequestHeader("token", header); } return null; } } 五、配置中心 1、配置中心服务（上传至git仓库的文件命名规则：[name]-[profile].yml） 1、pom.xml <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-config-server</artifactId> </dependency> 2、application.yml server: port: 8085 spring: application: name: EurekaConfig cloud: config: server: git: uri: https://gitee.com/YiSiYiNian/cloudconfig.git #git仓库地址 3、启动类 @SpringBootApplication @EnableConfigServer public class MyApplication { public static void main(String[] args) { SpringApplication.run(MyApplication.class); } } 4、测试 请求地址：配置中心服务地址+文件名 2、其他服务 1、pom.xml <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-config</artifactId> </dependency> 2、bootstrap.yml spring: cloud: config: name: application #文件名-前部分 profile: zuul #文件名-后部分 label: master #分支 uri: http://127.0.0.1:8085 #配置中心地址 六、bus：消息总线，要和消息队列一起使用，更改配置文件，不用重启服务 1、消息总线服务 1、pom.xml <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-bus</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-stream-binder-rabbit</artifactId> </dependency> 2、application.yml server: port: 8085 spring: application: name: EurekaConfig cloud: config: server: git: uri: https://gitee.com/YiSiYiNian/cloudconfig.git #git仓库地址 rabbitmq: host: 127.0.0.1 management: #暴露触发消息总线的地址 endpoints: web: exposure: include: bus-refresh 2、其他服务 1、pom.xml <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-bus</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-stream-binder-rabbit</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> 2、application.yml server: port: 8082 spring: application: name: EurekaClient rabbitmq: host: 127.0.0.1 eureka: client: service-url: defaultZone: http://127.0.0.1:8081/eureka/ instance: prefer-ip-address: true #跨域 zuul: routes: EurekaClientA: path: /a/** serviceId: EurekaClientA #服务名 person: name: mengmeiqi 3、向消息队列发送消息 url（消息总线服务）：http://127.0.0.1:8085/actuator/bus-refresh methods：post 4、自定义配置修改 组件上加注解：@RefreshScope，框架自己的配置无需加注解