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spring cloud eureka服务注册和调用

發(fā)布時間：2025/3/8 编程问答 37 豆豆

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SPRING INITIALIZR構(gòu)建工程

spring boot 可通過SPRING INITIALIZR構(gòu)建項目
訪問SPRING INITIALIZR官網(wǎng)，填寫項目相關(guān)信息后，生成項目。

將下載的項目解壓，打開idea，file-->new-->project from existing sources。

import project選擇maven項目，jdk選擇1.8或以上，一直next即可。

spring cloud server 提供服務(wù)注冊

1.修改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><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>1.5.3.RELEASE</version><relativePath/> </parent><groupId>com.gyt</groupId><artifactId>helloworld.Eureka.server</artifactId><version>0.0.1-SNAPSHOT</version><name>helloworld.Eureka.server</name><description>Demo project for Spring Boot</description><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding><java.version>1.8</java.version></properties><dependencies><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-eureka</artifactId></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-eureka-server</artifactId></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-config</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>Dalston.RC1</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><repositories><repository><id>spring-milestones</id><name>Spring Milestones</name><url>https://repo.spring.io/milestone</url><snapshots><enabled>false</enabled></snapshots></repository></repositories></project>

2.通過SPRING INITIALIZR構(gòu)建工程后，修改配置文件application.properties，我這里使用的是application.yml，兩者只在格式上存在差別。

3.啟動類application.java添加@EnableEurekaServer注解。

@EnableEurekaServer @SpringBootApplication public class Application {public static void main(String[] args) {SpringApplication.run(Application.class, args);}}

4.訪問http://localhost:8000/

spring cloud client 提供服務(wù)

1.同樣創(chuàng)建項目后，修改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><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>1.5.3.RELEASE</version><relativePath/> </parent><groupId>com.gyt</groupId><artifactId>helloworld.eureka.client</artifactId><version>0.0.1-SNAPSHOT</version><name>helloworld.eureka.client</name><description>Demo project for Spring Boot</description><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding><java.version>1.8</java.version></properties><dependencies><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-eureka</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</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>Dalston.RC1</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><repositories><repository><id>spring-milestones</id><name>Spring Milestones</name><url>https://repo.spring.io/milestone</url><snapshots><enabled>false</enabled></snapshots></repository></repositories></project>

2.application.yml

eureka:client:serviceUrl:#server對應(yīng)的地址defaultZone: http://localhost:8000/eureka/instance:hostname: localhost server:port: 8089 spring:application:#應(yīng)用名name: service-helloworld ribbon:eureka:enabled: true

其中關(guān)于ribbon的學(xué)習(xí)來自于 https://www.jianshu.com/p/f86...
3.ApplicationClient.java

@SpringBootApplication @EnableDiscoveryClient public class ApplicationClient {public static void main(String[] args) {SpringApplication.run(ApplicationClient.class, args);}}

4.HelloController.java

@RestController public class HelloController {@RequestMapping("/hello")public String index(@RequestParam String name) {return "hello "+name+"，hahahaha!";} }

5.訪問http://localhost:8089/hello?name=w

此時再看服務(wù)端，多了service-helloworld這個應(yīng)用。

spring cloud consumer 使用服務(wù)

1.新建項目，修改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><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>1.5.3.RELEASE</version><relativePath/> </parent><groupId>com.gyt</groupId><artifactId>helloworld.eureka.consumer</artifactId><version>0.0.1-SNAPSHOT</version><name>helloworld.eureka.consumer</name><description>Demo project for Spring Boot</description><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding><java.version>1.8</java.version></properties><dependencies><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-eureka</artifactId></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-eureka-server</artifactId></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-config</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-feign</artifactId></dependency></dependencies><dependencyManagement><dependencies><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-dependencies</artifactId><version>Dalston.RC1</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><repositories><repository><id>spring-milestones</id><name>Spring Milestones</name><url>https://repo.spring.io/milestone</url><snapshots><enabled>false</enabled></snapshots></repository></repositories></project>

2.application.propertites【這里特意沒有用yml】

spring.application.name=spring-cloud-consumer server.port=9001 eureka.client.serviceUrl.defaultZone=http://localhost:8000/eureka/

3.ApplicationConsumer.java

@SpringBootApplication @EnableDiscoveryClient @EnableFeignClients public class ApplicationConsumer {public static void main(String[] args) {SpringApplication.run(ApplicationConsumer.class, args);}}

4.創(chuàng)建接口類，HelloTest.java

//這里的name指定客戶端的應(yīng)用名 @FeignClient(name= "service-helloworld") public interface HelloTest {//這里requestMapping與客戶端相同@RequestMapping(value = "/hello")public String hello(@RequestParam(value = "name") String name); }

5.ConsumerController.java

@RestController public class ConsumerController {@AutowiredHelloTest helloTest;@RequestMapping("/hello/{name}")public String index(@PathVariable("name") String name) {return helloTest.hello(name);}}

6.訪問http://localhost:9001/hello/w

此時，服務(wù)端存在兩個應(yīng)用

總結(jié)

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