1、什么是服务提供者
服务提供者(Service Provider):是指服务的被调用方(即:为其它服务提供服务的服务);服务提供者,作为一个Eureka Client,向Eureka Server做服务注册、续约和下线等操作,注册的主要数据包括服务名、机器ip、端口号、域名等等。
从图中可以到Eureka 有两种服务实例,分别为Eureka Server和Eureka Client;而且Eureka Client又分为两种类型:Service Provider(服务提供者)和Service Consumer(服务消费者),如果学过dubbo发现这个图跟dubbo的调用关系图比较类似。
2、 新建meven项目
<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>spring-cloud</groupId> <artifactId>sc-eureka-client-provider</artifactId> <version>0.0.1-SNAPSHOT</version> <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> <!-- 说明是一个 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实现Java Web服务 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> <!-- 把tomcat-jdbc连接池排除掉,这样spring-boot就会寻找是否有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>
3、 创建ProviderApplication.java类
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的注解MapperScan扫描mapper文件所在的包
4、 创建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 #是否将自己注册到Eureka服务中,默认为true fetchRegistry: true #是否从Eureka中获取注册信息,默认为true serviceUrl: defaultZone: http://localhost:5001/eureka/ mybatis: mapperLocations: classpath:sc/provider/dao/*.xml #configLocation: classpath:mybatis-config.xml
Spring Cloud 2.x以后默认使用Hikari数据源,一个非常高效的数据源。
5、 其他需要创建的相关类请看下面
6、创建数据库sc和对应的表t_user(sql脚步参考项目中的sql文件)
7、 启动Eureka,对应的项目为sc-eureka-server;然后启动sc-eureka-client-provider
方式一:
方式二:
8、 验证是否成功
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