整体目录结构如下
整体目录结构 这里整个功能是一个maven项目,注册中心与功能服务都是maven项目里面的模块。
利用eureka搭建服务注册中心模块server-eureka 这是一个空的springboot项目,主要就是把他当做服务注册中心使用 1.springboot运行入口代码
package org.server.eureka;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
@EnableEurekaServer
@SpringBootApplication
public class App {
public static void main(String[] args) {
SpringApplication.run(App.class, args);
}
}
通过@EnableEurekaServer注解将应用标记为服务注册中心 2.pom配置文件
<?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>
<packaging>jar</packaging>
<name>server-eureka</name>
<description>eureka-server project for Spring Boot</description>
<groupId>cn.ysh.cloud</groupId>
<artifactId>server-eureka</artifactId>
<parent>
<groupId>cn.ysh</groupId>
<artifactId>cloud</artifactId>
<version>0.0.1-SNAPSHOT</version>
</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>
</project>
作者:帅哥哥写代码
链接:https://www.jianshu.com/p/48d2ef887530
来源:简书
简书著作权归作者所有,任何形式的转载都请联系作者获得授权并注明出处。
最主要的是要引入spring-cloud-starter-netflix-eureka-server这个jar包,用于支持以eureka作为服务注册中心 3.eureka服务的基本配置
server:
port: 8761(指定应用端口)
spring:
application:
name: eureka-server(指定应用名称)
eureka:
instance:
hostname: localhost
client:
register-with-eureka: false (不注册自己)
fetch-registry: false(不开启检索)
service-url:
defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/
做好这些配置,就完成了。
eureka-server管理界面.png 标红的应用中心显示目前没有服务注册到eureka中心
1.springboot入口代码
package org.client.one.eureka;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.openfeign.EnableFeignClients;
@EnableEurekaClient
@SpringBootApplication
@EnableFeignClients
public class App
{
public static void main(String[] args) {
SpringApplication.run(App.class, args);
}
}
两个重要注解@EnableEurekaClient、@EnableFeignClients。 @EnableEurekaClient标记为Eureka客服端(就是标记为Eureka一个服务) @EnableFeignClients开启Feign调用服务的方式。(调用服务有两种方式,一种是ribbon,一种是Feign),我这里想实现的是基于Feign实现client-one-eureka调用client-two-eureka服务方法。 2.pom依赖
<?xml version="1.0"?>
<project
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven->4.0.0.xsd"
xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>cn.ysh</groupId>
<artifactId>cloud</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<groupId>cn.ysh.cloud</groupId>
<artifactId>client-one-eureka</artifactId>
<name>client-one-eureka</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
<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>
</project>
作者:帅哥哥写代码
链接:https://www.jianshu.com/p/48d2ef887530
来源:简书
简书著作权归作者所有,任何形式的转载都请联系作者获得授权并注明出处。
主要是spring-cloud-starter-netflix-eureka-server的jar和spring-cloud-starter-openfeign的jar。 3.应用的基本配置
server:
port: 2001
spring:
application:
name: client-two-eureka
eureka:
client:
service-url:
defaultZone: http://localhost:8761/eureka/(这个和server配置的是一致的)
fetch-registry: true
register-with-eureka: true
到此第一个应用配置完成。
1.springboot入口代码
package org.client.two.eureka;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;
@EnableEurekaClient
@SpringBootApplication
public class App {
public static void main(String[] args) {
SpringApplication.run(App.class, args);
}
@Bean
@LoadBalanced
RestTemplate restTemplate() {
return new RestTemplate();
}
}
2.pom配置文件
<?xml version="1.0"?>
<project
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven->4.0.0.xsd"
xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>cn.ysh</groupId>
<artifactId>cloud</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<groupId>cn.ysh.cloud</groupId>
<artifactId>client-two-eureka</artifactId>
<name>client-two-eureka</name>
<url>http://maven.apache.org</url>
<dependencies>
<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-netflix-ribbon</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
</project>
作者:帅哥哥写代码
链接:https://www.jianshu.com/p/48d2ef887530
来源:简书
简书著作权归作者所有,任何形式的转载都请联系作者获得授权并注明出处。
spring-cloud-starter-netflix-ribbon的jar,这里主要是我想让client-two-eureka通过ribbon的方式调用client-one-eureka的服务接口。 3.配置文件
server:
port: 2001
spring:
application:
name: client-two-eureka
eureka:
client:
service-url:
defaultZone: http://localhost:8761/eureka/
fetch-registry: true
register-with-eureka: true
到此完成第二个服务应用的搭建。
启动client-one-eureka、client-two-eureka、server-eureka。当然server-eureka启动完成后,再启动client-one-eureka、client-two-eureka。原因很简单,服务中心起来之后,才能注册服务。 服务中心管理页面如下:
服务中心管理 可以看到应用中心里面已经有两个了。到这里服务注册功能已经完成。
1.client-one-eureka 创建一个Client1Test的controller
package org.client.one.eureka.controller;
import org.client.one.eureka.service.FeignSevice;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import colud.clent.model.User;
@RestController
@RequestMapping("/client1Test")
public class Client1Test {
@Autowired
FeignSevice feignSevice;
/**通过client-one-eureka调用client-two-eureka里面的client2Test/clint1(Feign方式)
* @param id
* @return
*/
@GetMapping("/clint1")
public String name(@RequestParam String id) {
System.out.println("进入client-one-eureka服务client1Test/clint1方法");
return feignSevice.test(id, new User("1", "ysh"));
}
/**等待被client-two-eureka调用
*
* @param id
* @return
*/
@GetMapping("/toCall")
public String test1client(@RequestParam String id) {
System.out.println("进入client-one-eureka服务client1Test/toCall方法");
return "调用eureka-client1服务test1client方法,参数id=" + id;
}
}
client-one-eureka调用client-two-eureka是通过Feign的方式。所以这边创建了一个FeignSevice。代码如下:
package org.client.one.eureka.service;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import colud.clent.model.User;
@Component
@FeignClient(name = "client-two-eureka")
public interface FeignSevice {
@RequestMapping(value = "/client2Test/test2", method = RequestMethod.GET)
public String test(@RequestParam("id") String id, @RequestBody User user);
}
代码说明:@FeignClient指定了我们所要调用服务的名称,@RequestMapping后面跟的就是我们所要调用服务的具体路径。 2.client-two-eureka 创建的controller代码
package org.client.two.eureka.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;
import colud.clent.model.User;
@RestController
@RequestMapping("/client2Test")
public class Client2Test {
@Autowired
RestTemplate restTemplate;
/**通过client-two-eureka调用client-one-eureka的client1Test/toCall方法(ribbon方式)
*
* @param id
* @return
*/
@GetMapping("/hi")
public String hi(@RequestParam String id) {
System.out.println("进入client-two-eureka服务client2Test/hi方法");
return restTemplate.getForObject("http://client-one-eureka/client1Test/toCall?id=" + id, >String.class);
}
/**等待被client-one-eureka调用
*
* @param id
* @param user
* @return
*/
@PostMapping("/test2")
public String testOne2(@RequestParam(required = false) String id, @RequestBody User user) {
System.out.println("进入client2Test/test2");
return "调用client-two-eureka服务test2方法,参数id=" + id + "user=" + user;
}
}
通过代码可以知道client-one-eureka的client1Test/clint1?id=''可以调用到client-two-eureka的client2Test/test2接口。这个接口采用了返回复杂对象予以说明。由于采用了复杂对象。为了服务间共享模型数据。所以我新建了clent-model模块。并在client-one-eureka服务、client-two-eureka服务中相继加入该模块依赖,完成数据结构共享。调用结果显示如下:
one call two
同样通过client-two-eureka的client2Test/hi?id=''可以调用到client-one-eureka的client1Test/toCall方法。结果演示如下:
two call one
文章到此就完成了服务注册与通过ribbon、Feign两种方式完成服务间相互调用。