中国建设工程招投网站,阿里云服务器安装网站,柯桥做网站哪家好,徐州免费模板建站一#xff0c;注册中心
最新版使用的是nacos#xff0c;可替换为eureka#xff0c;zookeeper#xff0c;使用方式大同小异#xff0c;这里不做扩展。
下载安装#xff1a;#xff08;有机会重装时再补上#xff09;
管理页面#xff1a;http://localhost:8848/naco…一注册中心
最新版使用的是nacos可替换为eurekazookeeper使用方式大同小异这里不做扩展。
下载安装有机会重装时再补上
管理页面http://localhost:8848/nacos/index.html 二搭建一个springcloud工程
1创建一个maven 父工程pom.xml如下
project xmlnshttp://maven.apache.org/POM/4.0.0 xmlns:xsihttp://www.w3.org/2001/XMLSchema-instance xsi:schemaLocationhttp://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsdmodelVersion4.0.0/modelVersiongroupIdcom.qi.study/groupIdartifactIdspringcloud/artifactIdversion0.0.1-SNAPSHOT/versionpackagingpom/packagingpropertiesjava.version18/java.versionspring-boot.version2.7.3/spring-boot.versionspring-cloud.version2021.0.3/spring-cloud.versionspring-cloud-alibaba.version2021.1/spring-cloud-alibaba.version/propertiesdependencyManagementdependencies!-- spring boot 依赖 --dependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-dependencies/artifactIdversion${spring-boot.version}/versiontypepom/typescopeimport/scope/dependency!-- spring cloud 依赖 --!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-dependencies --dependencygroupIdorg.springframework.cloud/groupIdartifactIdspring-cloud-dependencies/artifactIdversion${spring-cloud.version}/versiontypepom/typescopeimport/scope/dependency!-- spring cloud alibaba 依赖 --!-- https://mvnrepository.com/artifact/com.alibaba.cloud/spring-cloud-alibaba-dependencies --dependencygroupIdcom.alibaba.cloud/groupIdartifactIdspring-cloud-alibaba-dependencies/artifactIdversion${spring-cloud-alibaba.version}/versiontypepom/typescopeimport/scope/dependency/dependencies/dependencyManagementmodulesmodulenacos-server/modulemoduleapp-web/modulemoduleapp-service/module/modules
/project
2创建三个子工程
modulenacos-server/module
moduleapp-web/module
moduleapp-service/module
以nacos-server为例添加以下配置代码
1pom.xml
project xmlnshttp://maven.apache.org/POM/4.0.0 xmlns:xsihttp://www.w3.org/2001/XMLSchema-instance xsi:schemaLocationhttp://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsdmodelVersion4.0.0/modelVersionparentgroupIdcom.qi.study/groupIdartifactIdspringcloud/artifactIdversion0.0.1-SNAPSHOT/version/parentartifactIdnacos-server/artifactIddependenciesdependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-web/artifactId/dependency!-- https://mvnrepository.com/artifact/com.alibaba.cloud/spring-cloud-starter-alibaba-nacos-discovery --dependencygroupIdcom.alibaba.cloud/groupIdartifactIdspring-cloud-starter-alibaba-nacos-discovery/artifactId/dependency/dependenciesbuildpluginsplugingroupIdorg.springframework.boot/groupIdartifactIdspring-boot-maven-plugin/artifactId/plugin/plugins/build
/project
2application.yml
server:port: 8080spring:application:name: nacos-servercloud:nacos:discovery:server-addr: 127.0.0.1:8848
3Application.java
package com.qi.study.springcloud;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;SpringBootApplication
EnableDiscoveryClient
public class NacosServerApplication {public static void main(String[] args) {SpringApplication.run(NacosServerApplication.class, args);}}其他两个工程app-web 和 app-service 同上面一样只是改一下application.yml配置文件中的端口号和服务名称
#app-webserver:port: 8081spring:application:name: app-webcloud:nacos:discovery:server-addr: 127.0.0.1:8848#app-serviceserver:port: 8082spring:application:name: app-servicecloud:nacos:discovery:server-addr: 127.0.0.1:8848
分别启动三个项目在nacos服务注册中心查看是否注册成功 三添加feign远程接口的调用测试
1调用过程app-web(controller) - feignClient - app-service(controller)
2在工程app-web中添加feign依赖包 dependencygroupIdorg.springframework.cloud/groupIdartifactIdspring-cloud-starter-openfeign/artifactId/dependency!--引入openfeign必须要引入loadbalancer否则无法启动--dependencygroupIdorg.springframework.cloud/groupIdartifactIdspring-cloud-starter-loadbalancer/artifactId/dependency
3在启动类Application.java中通过注解EnableFeignClients开启feign功能
package com.qi.study.springcloud;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.openfeign.EnableFeignClients;SpringBootApplication
EnableDiscoveryClient
EnableFeignClients
public class AppWebApplication {public static void main(String[] args) {SpringApplication.run(AppWebApplication.class, args);}
}4app-web 添加controller测试接口
package com.qi.study.springcloud.controller;import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;import com.qi.study.springcloud.feignClient.AppServiceClient;RestController
public class HelloWorldController {private final static Logger LOGGER LoggerFactory.getLogger(HelloWorldController.class);Autowiredprivate AppServiceClient appServiceClient;GetMapping(/helloWorld)public String helloWorld (RequestParam(required false) String msg) {LOGGER.info(app-web 访问helloWorld接口入参 {}, msg);return appServiceClient.helloWorld(msg);}
}app-web 添加feignclient远程调用接口重要注解FeignClient(value app-service)
package com.qi.study.springcloud.feignClient;import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;/*** 通过feign远程调用服务app-service的http接口* 特别注意FeignClient这里的value要与app-service在nacos中注册的名称一致否则无法找到* author Admin**/
FeignClient(value app-service)
public interface AppServiceClient {GetMapping(/hello)String helloWorld(RequestParam(value msg, defaultValue world,required false) String msg);
}app-service 添加逻辑实现接口
package com.qi.study.springcloud.controller;import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;RestController
public class HelloController {private final static Logger LOGGER LoggerFactory.getLogger(HelloController.class);GetMapping(/hello)public String hello(RequestParam(value msg, defaultValue world ,required false) String msg) {LOGGER.info(app-service访问接口hello入参 {}, msg);return say hello - .concat(msg);}
}同时启动app-web和app-service访问测试 5feign还支持负载均衡无需额外配置保持app-service服务开启修改端口号为8083再次启动可以看到app-service注册的服务变为了两个 多次调用上面的测试接口就能看到两个app-service服务轮流返回数据。
四源代码下载https://download.csdn.net/download/MyNoteBlog/87447400
