一、什麼是服務提供者java
服務提供者(Service Provider):是指服務的被調用方(即:爲其它服務提供服務的服務);服務提供者,做爲一個Eureka Client,向Eureka Server作服務註冊、續約和下線等操做,註冊的主要數據包括服務名、機器ip、端口號、域名等等。mysql
從圖中能夠到Eureka 有兩種服務實例,分別爲Eureka Server和Eureka Client;並且Eureka Client又分爲兩種類型:Service Provider(服務提供者)和Service Consumer(服務消費者),若是學過dubbo發現這個圖跟dubbo的調用關係圖比較相似。web
二、 新建meven項目spring
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"sql
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">數據庫
<modelVersion>4.0.0</modelVersion>apache
<groupId>spring-cloud</groupId>tomcat
<artifactId>sc-eureka-client-provider</artifactId>mybatis
<version>0.0.1-SNAPSHOT</version>app
<packaging>jar</packaging>
<name>sc-eureka-client-provider</name>
<url>http://maven.apache.org</url>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.4.RELEASE</version>
</parent>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Finchley.RELEASE</version>
<type>pom</type>
</dependency>
</dependencies>
</dependencyManagement>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<dependencies>
<!-- 說明是一個 eureka client -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
<version>2.0.1.RELEASE</version>
</dependency>
<!-- spring boot實現Java Web服務 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<!-- 把tomcat-jdbc鏈接池排除掉,這樣spring-boot就會尋找是否有HikariCP可用 -->
<exclusions>
<exclusion>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-jdbc</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>com.zaxxer</groupId>
<artifactId>HikariCP</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>6.0.3</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.2</version>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.2</version>
</dependency>
</dependencies>
</project>
三、 建立ProviderApplication.java類
package sc.provider;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
@SpringBootApplication
@EnableEurekaClient
@MapperScan(basePackages="sc.provider.dao")
public class ProviderApplication {
public static void main(String[] args) {
SpringApplication.run(ProviderApplication.class, args);
}
}
Mybatis的註解MapperScan掃描mapper文件所在的包
四、 建立application.yml文件
server:
port: 8200
spring:
application:
name: sc-eureka-client-provider
datasource:
driverClassName: com.mysql.jdbc.Driver
url: jdbc:mysql://localhost:3306/sc?serverTimezone=UTC&useUnicode=true&characterEncoding=UTF-8
username: root
password: root
type: com.zaxxer.hikari.HikariDataSource
hikari:
minimum-idle: 5
maximum-pool-size: 15
auto-commit: true
idle-timeout: 30000
pool-name: DatebookHikariCP
max-lifetime: 1800000
connection-timeout: 30000
connection-test-query: SELECT 1
eureka:
client:
registerWithEureka: true #是否將本身註冊到Eureka服務中,默認爲true
fetchRegistry: true #是否從Eureka中獲取註冊信息,默認爲true
serviceUrl:
defaultZone: http://localhost:5001/eureka/
mybatis:
mapperLocations: classpath:sc/provider/dao/*.xml
#configLocation: classpath:mybatis-config.xml
Spring Cloud 2.x之後默認使用Hikari數據源,一個很是高效的數據源。
五、 其餘須要建立的相關類請看下面
六、建立數據庫sc和對應的表t_user(sql腳步參考項目中的sql文件)
七、 啓動Eureka,對應的項目爲sc-eureka-server;而後啓動sc-eureka-client-provider
方式一:
方式二:
八、 驗證是否成功
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