PS:
所有的服务提供者和服务调用者都会在注册中心进行注册,服务提供者在注册中心上提供服务,服务调用者在注册中心中获取服务列表。
导入相关依赖,pom文件如下
<?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> <groupId>com.zgy</groupId> <artifactId>first-114</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>first-114</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.13.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> </properties> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>Dalston.SR5</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <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> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project> 复制代码
将注解@EnableEurekaServer加在启动类上
package com.zgy.first114; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.builder.SpringApplicationBuilder; import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer; /** * @EnableEurekaServer:说明该应用是一个Eureka服务器 */ @SpringBootApplication @EnableEurekaServer public class First114Application { public static void main(String[] args) { new SpringApplicationBuilder(First114Application.class).web(true).run(args); } } 复制代码
配置文件
server: port: 8761 #设置服务器端口号为:8761 eureka: client: register-with-eureka: false #不注册到其他Eureka服务器上 fetch-registry: false #不在其他Eureka服务器上读取注册信息 复制代码
启动应用
导入依赖,pom文件如下
<?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> <groupId>com.zgy</groupId> <artifactId>first-police</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>first-police</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.13.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>Dalston.SR5</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <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.boot</groupId> <artifactId>spring-boot-starter</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-eureka</artifactId> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project> 复制代码
将注解@EnableEurekaClient加在启动类上
package com.zgy.firstpolice; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.eureka.EnableEurekaClient; /** * @EnableEurekaClient:说明该应用是一个客户端 */ @SpringBootApplication @EnableEurekaClient public class FirstPoliceApplication { public static void main(String[] args) { SpringApplication.run(FirstPoliceApplication.class, args); } } 复制代码
package com.zgy.firstpolice; public class Police { private Integer id; private String name; private String message; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getMessage() { return message; } public void setMessage(String message) { this.message = message; } } 复制代码
package com.zgy.firstpolice; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RestController; @RestController public class PoliceController { @GetMapping("/call/{id}") public Police call(@PathVariable Integer id){ Police police = new Police(); police.setId(id); police.setName("张三"); police.setMessage("AAA"); return police; } } 复制代码
配置文件
spring: application: name: first-police #定义项目的名称 eureka: client: service-url: defaultZone: http://localhost:8761/eureka/ #将该应用注册到Eureka服务器上 复制代码
启动应用,然后查看eureka服务器
引入依赖,pom文件如下
<?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> <groupId>com.zgy</groupId> <artifactId>first-person</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>first-person</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.13.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> </properties> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>Dalston.SR5</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</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-eureka</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-ribbon</artifactId> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project> 复制代码
将注解@EnableEurekaClient加在启动类上
package com.zgy.firstperson; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.eureka.EnableEurekaClient; @SpringBootApplication @EnableEurekaClient public class FirstPersonApplication { public static void main(String[] args) { SpringApplication.run(FirstPersonApplication.class, args); } } 复制代码
编写Controller
package com.zgy.firstperson; import org.springframework.cloud.client.loadbalancer.LoadBalanced; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RestController; import org.springframework.web.client.RestTemplate; @RestController @Configuration public class TestController { /* @LoadBalanced:该RestTemplate具有负载均衡的功能 */ @Bean @LoadBalanced public RestTemplate getRestTemplate(){ return new RestTemplate(); } @GetMapping("/router") public String router(){ RestTemplate restTemplate = getRestTemplate(); String json = restTemplate.getForObject("http://first-police/call/100", String.class); return json; } } 复制代码
配置文件
server: port: 8081 spring: application: name: first-person eureka: client: service-url: defaultZone: http://localhost:8761/eureka/ 复制代码
启动应用,查看eureka服务器
访问Controller
第一个应用就已经完成,以下是本次程序的结构图