idea简单搭建springCloud项目包含(gateway与zuul)

idea简单搭建springCloud项目包含(gateway与zuul)

搭建过程中主要遇到的问题就是依赖版本问题。阅读者项目如果没有启动，可以看下你的依赖版本。

一.先搭建eureka项目父工程

依赖：

org.springframework.cloudspring-cloud-starter-netflix-eureka-serverorg.springframework.bootspring-boot-starter-testtest

yml配置：

server:
port: 8761
eureka:
instance:hostname: localhost
client:register-with-eureka: falsefetch-registry: falseservice-url:defaultZone: http://localhost:8761/eureka/
spring:
application:name: online

启动类：

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;@SpringBootApplication
@EnableEurekaServer
public class EurekaDemoApplication {public static void main(String[] args) {SpringApplication.run(EurekaDemoApplication.class, args);}}

浏览器访问：http://localhost:8761/

二.搭建生产者

依赖：

4.0.0org.springframework.bootspring-boot-starter-parent2.5.5 com.exampleproduct-demo0.0.1-SNAPSHOTproduct-demoDemo project for Spring Boot1.82020.0.4org.springframework.cloudspring-cloud-starter-netflix-eureka-clientorg.springframework.bootspring-boot-starter-webcom.alibabafastjson1.2.72io.github.openfeignfeign-httpclient10.2.0org.springframework.bootspring-boot-starter-testtestorg.springframeworkspring-web5.3.10org.springframework.cloudspring-cloud-dependencies${spring-cloud.version}pomimportorg.springframework.bootspring-boot-maven-plugin

yml配置：

server:port: 8763
eureka:client:service-url:defaultZone: http://localhost:8761/eureka/
spring:application:name: server-product

controller类：

import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;@RestController
public class ProductDemoController {@Value("${server.port}")String port ;@GetMapping("/hi")public String home(@RequestParam String name){return "hi ... " + name + ",i am from port:" + port;}
}

启动类：

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;@SpringBootApplication
@EnableEurekaClient
public class ProductDemoApplication {public static void main(String[] args) {SpringApplication.run(ProductDemoApplication.class, args);}}

访问：http://localhost:8763/hi?name=xxx

并且注册中心界面也可以看到

三.消费方（这里我加了熔断不用可以去掉@EnableHystrix与 @HystrixCommand(fallbackMethod = “hiError”)）：

依赖：

4.0.0org.springframework.bootspring-boot-starter-parent2.5.5 com.exampleproduct-demo0.0.1-SNAPSHOTproduct-demoDemo project for Spring Boot1.82020.0.4org.springframework.cloudspring-cloud-starter-netflix-eureka-clientorg.springframework.bootspring-boot-starter-webcom.alibabafastjson1.2.72io.github.openfeignfeign-httpclient10.2.0org.springframework.bootspring-boot-starter-testtestorg.springframeworkspring-web5.3.10org.springframework.cloudspring-cloud-starter-netflix-hystrix2.2.9.RELEASEorg.springframework.cloudspring-cloud-dependencies${spring-cloud.version}pomimportorg.springframework.bootspring-boot-maven-plugin

yml配置：

server:port: 8764
eureka:client:service-url:defaultZone: http://localhost:8761/eureka/
spring:application:name: server-consumer

controller类:

import com.example.consumerdemo.service.HelloService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;@RestController
public class HelloControler {@AutowiredHelloService helloService;@RequestMapping(value = "/hi")public String hi(@RequestParam String name){return helloService.hiService(name);}}

service层:

import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.client.RestTemplate;@Service
public class HelloService {@AutowiredRestTemplate restTemplate;@HystrixCommand(fallbackMethod = "hiError")public String hiService(String name) {return restTemplate.getForObject("http://server-product/hi?name=" + name, String.class);}public String hiError(String name) {return "key-->" + name + ", this is error page..didi ..." ;}}

启动类:

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.netflix.hystrix.EnableHystrix;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;@EnableDiscoveryClient
@SpringBootApplication
@EnableHystrix
public class ConsumerDemoApplication {public static void main(String[] args) {SpringApplication.run(ConsumerDemoApplication.class, args);}@Bean@LoadBalanced// 标注此注解后，RestTemplate就具有了客户端负载均衡能力RestTemplate template (){return new RestTemplate();}}

访问：http://localhost:8764/hi?name=oop(熔断机制可以停掉生产方服务触发)

四.网关(zuul与gateway选一个就可)

1）zuul
依赖：

4.0.0org.springframework.bootspring-boot-starter-parent2.1.3.RELEASE com.examplezuul-demo0.0.1-SNAPSHOTzuul-demoDemo project for Spring Boot1.8Greenwich.RELEASEorg.springframework.bootspring-boot-starter-webfluxorg.springframework.cloudspring-cloud-starter-netflix-eureka-client2.1.0.RELEASEorg.springframework.bootspring-boot-starter-testtestio.projectreactorreactor-testtestorg.springframework.cloudspring-cloud-starter-netflix-zuul2.1.0.RELEASEorg.springframework.cloudspring-cloud-starter-zuul1.4.7.RELEASEorg.springframework.cloudspring-cloud-starter-eureka1.4.7.RELEASEorg.junit.jupiterjunit-jupiter-api5.7.2testorg.springframework.cloudspring-cloud-dependenciesGreenwich.RELEASEpomimportorg.springframework.bootspring-boot-maven-plugin

yml:

#端口号
server:
port: 8765
#配置应用名称
spring:
application:name: zuul-server
#eureka
eureka:
client:service-url:defaultZone: http://localhost:8761/eureka
#zuul
#前缀
#zuul.prefix=/tour
zuul:
routes:online:path: /online/**service-id: server-consumer
zuul:sensitive-headers: Set-Cookie,Cookie,Host,Connection,Content-Length,Content-Encoding,Server,Transfer-Encoding,X-Application-Context
#  zuul.routes.account.path=/account/**
#zuul.routes.account.service-id=server-consumer
#zuul.routes.online.path=/online/**
#// 需要代理的服务
#zuul.routes.online.service-id=server-consumer

启动类：

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.netflix.zuul.EnableZuulProxy;@SpringBootApplication
@EnableZuulProxy
@EnableEurekaClient
public class ZuulDemoApplication {public static void main(String[] args) {SpringApplication.run(ZuulDemoApplication.class, args);}}

启动zuul网关后，可以根据网关配置的路径访问了就

eureka注册中心也能看到，这里就不配图了

现在来看下Gateway
依赖：

4.0.0org.springframework.bootspring-boot-starter-parent2.5.5 com.examplegateway-demo0.0.1-SNAPSHOTgateway-demoDemo project for Spring Boot1.82020.0.4org.springframework.cloudspring-cloud-starter-gatewayorg.springframework.cloudspring-cloud-starter-loadbalancerorg.springframework.cloudspring-cloud-starter-netflix-eureka-clientorg.springframework.bootspring-boot-starter-testtestorg.springframework.cloudspring-cloud-dependencies${spring-cloud.version}pomimportorg.springframework.bootspring-boot-maven-plugin

yml配置：

# 网关配置
spring:application:name: gateway-servercloud:gateway:discovery:locator:lower-case-service-id: true #表示将请求路径的服务名配置改成小写 因服务注册的时候，向注册中心注册服务是将服务名转成大写的了enabled: true  #是否与服务注册于发现组件进行结合，通过 serviceId转发到具体的服务实例。 默认为false，设为true便开启通过服务中心的自动根据serviceId创建路由的功能routes:# 路由到本机的9000端口上- id: hello_route  #我们自己定义的路由ID，保持唯一性一般与程序名保持一致uri: http://localhost:8764predicates:- Path=/online/**filters:- StripPrefix=1# 集成eureka注册中心的配置示例- id: online_aaa#代表从注册中心获取服务，且以lb(load-balance)负载均衡方式转发uri: lb://server-consumer:8764predicates:  #断言- Path=/online1/** #表示将以/online开头的请求转发到uri为lb://server-consumer的地址上 转发地址为uri/server-consumer/**filters:     #过滤器- StripPrefix=1   #代表截取路径的个数  当请求匹配到/online/** 会将/online去掉转发。例/onlinea/hello就会变成127.0.0.1:8766/hello(后端请求路径)# 路由到百度页面- id: baidu_routeuri: http://www.baidu.compredicates:- Path=/baidu/**filters:- StripPrefix=1
server:port: 8765#服务注册中心
eureka:client:register-with-eureka: true #是否将自己注册到注册中心fetch-registry: true #是否从注册中心服务注册信息service-url:defaultZone: http://localhost:8761/eurekainstance:prefer-ip-address: true#定义实例ID格式instance-id: ${spring.application.name}:${server.port}

启动类:

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;/*
*
* zzs
* */
@EnableDiscoveryClient
@SpringBootApplication
public class GatewayDemoApplication {public static void main(String[] args) {SpringApplication.run(GatewayDemoApplication.class, args);}}

启动服务即可：http://localhost:8765/online/hi?name=ooo

注册中心：

简单的搭建就完毕啦。

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