SpringCloud入门demo

1. 创建服务端，项目名spring-boot-cloud

pom.xml设置

	<name>spring-boot-cloud</name>
	<description>Demo project for Spring Boot</description>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.5.7.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>Dalston.SR3</spring-cloud.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-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>

application.properties设置

spring.application.name=eureka
server.port=8761


eureka.instance.hostname=localhost
eureka.client.register-with-eureka=false
eureka.client.fetch-registry=false

springboot启动类

@SpringBootApplication
@EnableEurekaServer
public class SpringBootCloudApplication {

	public static void main(String[] args) {
		SpringApplication.run(SpringBootCloudApplication.class, args);
	}
}

目录结构如下

2.创建消费端，项目名spring-boot-cloud-counsumer

pom.xm设置

<name>spring-boot-cloud-consumer</name>
	<description>Demo project for Spring Boot</description>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.5.7.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>Dalston.SR3</spring-cloud.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-eureka-server</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-ribbon</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>

application.properties设置

server.port=2101

spring.application.name=service-ribbon
eureka.client.serviceUrl.defaultZone=http://localhost:8761/eureka/

Controller 类

@RestController
public class DcController {


    @Autowired
    private RestTemplate restTemplate;

    @GetMapping("/consumer")
    public String consumer() {
        String url = "http://eureka-client/product?name=jaycekon";
        return new RestTemplate().getForObject(url, String.class);
    }


    @GetMapping("/ribbon")
    public String ribbon() {
        return restTemplate.getForObject("http://eureka-client/product?name=jaycekon", String.class);
    }


}

启动类SpringBootCloudConsumerApplication

@SpringBootApplication
@EnableDiscoveryClient
public class SpringBootCloudConsumerApplication {

	@Bean
	@LoadBalanced
	RestTemplate restTemplate() {
		return new RestTemplate();
	}


	public static void main(String[] args) {
		new SpringApplicationBuilder(
				SpringBootCloudConsumerApplication.class)
				.web(true).run(args);
	}
}

项目结构

3.创建提供者端，项目名spring-boot-cloud-provider

pom.xml设置

	<name>spring-boot-cloud-provider</name>
	<description>Demo project for Spring Boot</description>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.5.7.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>Dalston.SR3</spring-cloud.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-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>

创建controller类

@RestController
public class DcController {



    @Value("${server.port}")
    String port;

    @RequestMapping("/product")
    public String product(@RequestParam String name) {

        return "hi "+name+",i am from port:" +port;
    }

}

启动类

@SpringBootApplication
@EnableDiscoveryClient
public class SpringBootCloudProviderApplication {

	public static void main(String[] args) {

		new SpringApplicationBuilder(
				SpringBootCloudProviderApplication.class)
				.web(true).run(args);
	}
}

application.properties设置

spring.application.name=eureka-client
server.port=2003
eureka.client.serviceUrl.defaultZone=http://localhost:8761/eureka/
eureka.instance.hostname=server2

项目结构

4.启动这3个服务

访问eureka Server

输入localhost:8761

可以看到服务已经注册进来

服务提供消费端输入http://localhost:2101/ribbon

成功访问