关键词:
spring cloud分为注册端、客户端以及消费端
初体验的理解就是:
注册端就是将之前所有的应用在这边进行注册,然后给每个应用都生成自己的标识,这些应用就是来自于客户端,消费端则通过调用注册端(有点数据中心的概念)然后去调用客户端各个的应用.
1、注册端代码:
直接创建maven项目:
pom.xml
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.tp.soft</groupId> <artifactId>cloud-service</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>eureka-service</name> <description>Forward project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.5.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> <spring-cloud.version>Finchley.SR1</spring-cloud.version> </properties> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>${spring-cloud.version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
application.yml
#本项目端口
server:
port: 8761
#服务注册中心实例主机名
eureka:
instance:
hostname: host
client:
#是否向注册中心注册自己
register-with-eureka: false
#是否获取注册表
fetch-registry: false
#服务地址,向哪里注册的地址,如果没有下面的注册地址但是开启了上面的
#想注册中心注册自己就会报错,因为没有说明注册中心地址,不知道注册到哪里
service-url:
defaultZone: http://127.0.0.1:8761/eureka/
#通过引用上面的定义来声明注册地址,有一定局限性主要在hostname这块,上面写死的方式比较灵活,如果一定要用下面这种方法,必要时hostname的映射一定要匹配地址,需要在host文件中做映射
# defaultZone: http://${eureka.instance.hostname}:{server.port}/eureka/
CloudServerApplication.java
package com.tp.soft.cloudserver; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer; @SpringBootApplication @EnableEurekaServer public class CloudServerApplication { public static void main(String[] args) { SpringApplication.run(CloudServerApplication.class, args); } }
启动springboot
至此注册中心搭建完成,目前看到的是0个应用
2、客户端代码:
同样创建一个maven项目
pom.xml
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.tp.soft</groupId> <artifactId>cloud-client</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>cloud-client</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.5.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> <spring-cloud.version>Finchley.SR1</spring-cloud.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <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-test</artifactId> <scope>test</scope> </dependency> </dependencies> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>${spring-cloud.version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
application.yml
spring:
application:
name: client
server:
port: 8762
eureka:
client:
eureka-server-port: 8762
register-with-eureka: true
service-url:
defaultZone: http://127.0.0.1:8761/eureka/
CloudClientApplication.java
package com.tp.soft.cloudclient; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.eureka.EnableEurekaClient; @SpringBootApplication @EnableEurekaClient public class CloudClientApplication { public static void main(String[] args) { SpringApplication.run(CloudClientApplication.class, args); } }
创建应用接口 也就是后期所有业务接口源头 注册到注册中心供其他业务互相调用
HelloController.java
package com.tp.soft.cloudclient.controller; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RestController; @RestController public class HelloController { @GetMapping("hello") public String hello(){ return "hello"; } }
启动之后
可以看到client应用已经注册成功,接下来就可以在消费端去直接访问这个应用 不用再重复相同的业务接口了
3、消费端
pom.xml
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.tp.soft</groupId> <artifactId>cloud-consume</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>eureka-consume</name> <description>Forward project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.5.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> <spring-cloud.version>Finchley.SR1</spring-cloud.version> </properties> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-ribbon</artifactId> <version>1.4.2.RELEASE</version> </dependency> <!--断路器--> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-hystrix</artifactId> <version>1.4.4.RELEASE</version> </dependency> </dependencies> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>${spring-cloud.version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
application.yml
#本项目端口
server:
port: 8763
eureka:
client:
serviceUrl:
defaultZone: http://127.0.0.1:8761/eureka/
spring:
application:
name: service-ribbon
CloudConsumeApplication.java
package com.tp.soft.cloudconsume; 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.context.annotation.Bean; import org.springframework.web.client.RestTemplate; @SpringBootApplication @EnableDiscoveryClient public class CloudConsumeApplication { public static void main(String[] args) { SpringApplication.run(CloudConsumeApplication.class, args); } @Bean @LoadBalanced RestTemplate restTemplate(){ return new RestTemplate(); } }
HelloController.java
package com.tp.soft.cloudconsume.controller; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RestController; import org.springframework.web.client.RestTemplate; @RestController public class HelloController { @Autowired RestTemplate restTemplate; @GetMapping("hi") public String hi(){ return restTemplate.getForObject("http://CLIENT/hello", String.class); } }
http://对应的应用名/接口名
项目链接
https://github.com/tplovejava/springcloud.git
至此完成配置,有什么不足的,请大牛们不令赐教
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