idea搭建springcloud+注册中心+服务提供者+服务消费者
先创建一个maven项目,如图所示填上必要的内容,这随便填然后新建module,就是一个个的springboot右击项目名字此时项目的结构是:配置文件的内容如下所示:server.port=9000eureka.instance.hostname=localhost#由于该应用为注册中心,所以设置为false 代表不向注册中心注册自己eureka.client.r...
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先创建一个maven项目,如图所示
填上必要的内容,这随便填
然后新建module,就是一个个的springboot
右击项目名字
此时项目的结构是:
配置文件的内容如下所示:
server.port=9000
eureka.instance.hostname=localhost
#由于该应用为注册中心,所以设置为false 代表不向注册中心注册自己
eureka.client.register-with-eureka=false
#由于注册中心的职责就是维护服务实例,它并不需要去检索服务,所以为false
eureka.client.fetch-registry=false
eureka.client.service-url.defaultZone=http://${eureka.instance.hostname}:${server.port}/eureka/
启动类的内容是:
package com.wky.register;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
@EnableEurekaServer
@SpringBootApplication
public class RegisterApplication {
public static void main(String[] args) {
SpringApplication.run(RegisterApplication.class, args);
}
}
启动类加上了@EnableEurekaServer注解
pom文件的内容是:
<?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>2.1.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.wky</groupId>
<artifactId>register</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>register</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>Greenwich.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>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
然后运行localhost:9000
得到的结果是:
这个时候注册中心就注册好了,接下来我们来写服务提供者,服务提供者的方法跟注册中心差不多,我们直接跳过那些步骤,直接上一些代码
配置文件代码如下所示:
#为服务命名
spring.application.name=hello-service
#指定服务注册中心的地址
eureka.client.service-url.defaultZone=http://localhost:9000/eureka/
pom文件的代码如下:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.wky</groupId>
<artifactId>service01</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>service01</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>Greenwich.SR1</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${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>
启动类:
package com.wky.service01;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
@EnableEurekaServer
@SpringBootApplication
public class Service01Application {
public static void main(String[] args) {
SpringApplication.run(Service01Application.class, args);
}
}
新建了一个controller
@RestController
public class Service01Controller {
@RequestMapping(value = "/hello",method = RequestMethod.GET)
public String index(){
return "Hello World ";
}
}
最后我们来写服务消费者:
基本步骤跟注册中心一样:
我们直接上代码:
pom
<?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>2.1.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.wky</groupId>
<artifactId>consumer01</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>consumer01</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>Greenwich.SR1</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-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>
</project>
可以看出依赖中我们引入了ribbon依赖,提供负载均衡机制,
配置文件:
spring.application.name=ribbon-consumer
server.port=9001
eureka.client.service-url.defaultZone=http://localhost:9000/eureka/
启动类:这时候的启动类跟之前不一样,代码如下:
@EnableDiscoveryClient
@SpringBootApplication
public class Consumer01Application {
@Bean
@LoadBalanced //负载均衡
RestTemplate restTemplate(){
return new RestTemplate();
}
public static void main(String[] args) {
SpringApplication.run(Consumer01Application.class, args);
}
}
controller层代码如下:
@RestController
public class Consumer01Controller {
@Autowired
RestTemplate restTemplate;
@RequestMapping(value = "/ribbon-consumer",method = RequestMethod.GET)
public String helloConsumer(){
return restTemplate.getForEntity("http://HELLO-SERVICE",String.class).getBody();
}
}
最后我们来看看:
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