最新版本SpringBoot 、SpringCloud 学习之搭建注册中心、服务者、消费者

父类配置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>
 <groupId>com.dairuijie</groupId>
 <artifactId>drj_parent</artifactId>
 <version>0.0.1-SNAPSHOT</version>
 <packaging>pom</packaging>
 <modules>
  <module>drj_eureka_server</module>
  <module>drj_eureka_client</module>
  <module>drj_eureka_consumer</module>
    <module>drj_eureka_provide</module>
  </modules>
 <parent>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-parent</artifactId>
  <version>2.1.4.RELEASE</version>
  <relativePath/> <!-- lookup parent from repository -->
 </parent>
 <dependencyManagement>
  <dependencies>
   <dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-dependencies</artifactId>
    <version>Greenwich.SR1</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>
  <apache.poi.version>3.12</apache.poi.version>
 </properties>
 <dependencies>
  <!-- sprinCloud jar -->
  <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-web</artifactId>
  </dependency>

  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-devtools</artifactId>
   <scope>runtime</scope>
  </dependency>
  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-test</artifactId>
   <scope>test</scope>
  </dependency>
  <!-- https://mvnrepository.com/artifact/com.alibaba/fastjson -->
  <dependency>
   <groupId>com.alibaba</groupId>
   <artifactId>fastjson</artifactId>
   <version>1.2.51</version>
  </dependency>
  <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
  <dependency>
   <groupId>mysql</groupId>
   <artifactId>mysql-connector-java</artifactId>
  </dependency>
  <!-- <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> 
   </dependency> -->
  <dependency>
   <groupId>org.mybatis.spring.boot</groupId>
   <artifactId>mybatis-spring-boot-starter</artifactId>
   <version>1.3.0</version>
  </dependency>
  <!-- mybatis的分页插件 -->
  <dependency>
   <groupId>com.github.pagehelper</groupId>
   <artifactId>pagehelper</artifactId>
   <version>4.1.0</version>
  </dependency>
  <!-- https://mvnrepository.com/artifact/org.thymeleaf/thymeleaf -->
  <dependency>
   <groupId>org.thymeleaf</groupId>
   <artifactId>thymeleaf-spring5</artifactId>
  </dependency>
  <!-- servlet 依赖. -->
  <dependency>
   <groupId>javax.servlet</groupId>
   <artifactId>javax.servlet-api</artifactId>
   <scope>provided</scope>
  </dependency>
  <dependency>
   <groupId>net.sf.json-lib</groupId>
   <artifactId>json-lib</artifactId>
   <version>2.4</version>
   <classifier>jdk15</classifier>
  </dependency>
  <!-- JSTL（JSP Standard Tag Library，JSP标准标签库)是一个不断完善的开放源代码的JSP标签库，是由apache的jakarta小组来维护的。 -->
  <dependency>
   <groupId>javax.servlet</groupId>
   <artifactId>jstl</artifactId>
  </dependency>
  <!-- alibaba的druid数据库连接池 -->
  <!-- <dependency> <groupId>com.alibaba</groupId> <artifactId>druid-spring-boot-starter</artifactId> 
   <version>1.1.0</version> </dependency> -->
  <!-- tomcat 的支持. -->
  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-tomcat</artifactId>
   <scope>provided</scope>
  </dependency>
  <dependency>
   <groupId>org.apache.tomcat.embed</groupId>
   <artifactId>tomcat-embed-jasper</artifactId>
   <scope>provided</scope>
  </dependency>
  <dependency>
   <groupId>commons-io</groupId>
   <artifactId>commons-io</artifactId>
   <version>2.2</version>
  </dependency>
 </dependencies>
<repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>repository.springframework.maven.release</id>
            <name>Spring Framework Maven Release Repository</name>
            <url>http://maven.springframework.org/milestone/</url>
        </repository>
        <repository>
            <id>org.springframework</id>
            <url> http://maven.springframework.org/snapshot</url>
        </repository>
        <repository>
            <id>spring-milestone</id>
            <name>Spring Maven MILESTONE Repository</name>
            <url>http://repo.spring.io/libs-milestone</url>
        </repository>
        <repository>
            <id>spring-release</id>
            <name>Spring Maven RELEASE Repository</name>
            <url>http://repo.spring.io/libs-release</url>
        </repository>
    </repositories>
</project>

注册中心EureKa启动类配置

package org.drj_eureka_server;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;

/**
 * Hello world!
 *
 */
@SpringBootApplication
@EnableEurekaServer
public class App {
    public static void main(String[] args) {
        System.out.println("Hello World!");
        SpringApplication.run(App.class, args);
        System.out.println("Hello World! end");
    }
}

Eureka yml 配置

spring:
  application:
    name: eureka-server
  datasource: 
        name: test 
        url: jdbc:mysql://127.0.0.1:3306/drj 
        username: root 
        password: 199458 # 使用druid数据源 
        driver-class-name: com.mysql.jdbc.Driver
server:
  host: localhost
  port: 8888
eureka:
  client:
    #此项目不作为客户端注册
    register-with-eureka: false
    fetch-registry: false
    service-url:
      #开启权限验证后Eureka地址为 用户名：密码@地址：端口号，如未开启权限验证则直接使用 地址：端口号
      defaultZone: http://localhost:8888/eureka

服务提供者一yml配置

spring:
  application:
    name: eureka-client
  datasource: 
        name: test 
        url: jdbc:mysql://127.0.0.1:3306/drj 
        username: root 
        password: 199458 # 使用druid数据源 
        driver-class-name: com.mysql.jdbc.Driver
server:
  host: localhost
  port: 8887
eureka:
  client:
    #此项目不作为客户端注册
    #register-with-eureka: false
    #fetch-registry: false
    service-url:
      #开启权限验证后Eureka地址为 用户名：密码@地址：端口号，如未开启权限验证则直接使用 地址：端口号
      defaultZone: http://localhost:8888/eureka

服务提供者二yml配置

spring:
  application:
    name: eureka-client
  datasource: 
        name: test 
        url: jdbc:mysql://127.0.0.1:3306/drj 
        username: root 
        password: 199458 # 使用druid数据源 
        driver-class-name: com.mysql.jdbc.Driver
server:
  host: localhost
  port: 8889
eureka:
  client:
    #此项目不作为客户端注册
    #register-with-eureka: false
    #fetch-registry: false
    service-url:
      #开启权限验证后Eureka地址为 用户名：密码@地址：端口号，如未开启权限验证则直接使用 地址：端口号
      defaultZone: http://localhost:8888/eureka

服务启动配置

package org.drj_eureka_client;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;

/**
 * Hello world!
 *
 */
@SpringBootApplication
@EnableEurekaClient
public class App 
{
    public static void main( String[] args )
    {
        System.out.println( "Hello World!" );
        SpringApplication.run(App.class, args);
        System.out.println("end");
    }
}

@RestController
@RequestMapping("/drjClient")
public class HelloController {

    @RequestMapping("/hello")
    public String hello() {
        return "8889 HelloWorld!";
    }

}

消费者yml 配置

spring:
  application:
    name: eureka-consumer
  datasource: 
        name: test 
        url: jdbc:mysql://127.0.0.1:3306/drj 
        username: root 
        password: 199458 # 使用druid数据源 
        driver-class-name: com.mysql.jdbc.Driver
server:
  host: localhost
  port: 8890
eureka:
  client:
    #register-with-eureka: true
    #fetch-registry: false
    service-url:
      #开启权限验证后Eureka地址为 用户名：密码@地址：端口号，如未开启权限验证则直接使用 地址：端口号
      defaultZone: http://localhost:8888/eureka

负载均衡配置

package org.drj_eureka_consumer.config;

import org.springframework.boot.web.client.RestTemplateBuilder;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;

/**
 * 
 * @ClassName:  RestConfig   
 * @Description:TODO(这里用一句话描述这个类的作用)   
 * @author: drj 
 * @date:   2019年5月13日 上午11:07:08   
 *     
 * @Copyright: 2019 
 *
 */
@Configuration
public class RestConfig {
    @Bean
    @LoadBalanced
    public RestTemplate restTemplate(RestTemplateBuilder builder){
        return builder.build();
    }
}

消费者Http+RestTemplate调用

package org.drj_eureka_consumer.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

/**
 * 
 * @ClassName:  ConsumerController   
 * @Description:TODO(这里用一句话描述这个类的作用)   
 * @author: drj 
 * @date:   2019年5月13日 上午10:42:13   
 *     
 * @Copyright: 2019 
 *
 */
@RestController
@RequestMapping("drjConsumer")
public class ConsumerController {

    @Autowired
    private RestTemplate restTemplate;
    
    @RequestMapping("/hello")
    public ResponseEntity<String> hello() {
       return restTemplate.getForEntity("http://eureka-client/drjClient/hello", String.class);
    }
    
}

注意事项

使用SpringBoot2.1.4.RELEASE 和 Spring Cloud Greenwich.SR1  如果不匹配報錯：
 如下：The bean 'dataSource', defined in BeanDefinition defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Hikari.class], could not be registered. A bean with that name has already been defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Hikari.class] and overriding is disabled.

参考版本连接
SpringCloud 版本 https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-dependencies
SpringBoot 版本 https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-parent

GItHub:https://github.com/dairuijie/drj_parent

最新版本SpringBoot 、SpringCloud 学习之搭建注册中心、服务者、消费者

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