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SpringBoot整合dynamic-datasource实现动态切换多数据源

攻城狮Chova 2022-04-29 阅读 57

dynamic-datasource-spring-boot-starter 是一个基于springboot的快速集成多数据源的启动器,具有支持 数据源分组、自定义注解、自定义数据源来源等特性,更多详情可以访问官网

1. 引入核心依赖

<dependency>
   <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>3.5.1</version>
</dependency>
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <scope>runtime</scope>
</dependency>
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>dynamic-datasource-spring-boot-starter</artifactId>
    <version>3.5.1</version>
</dependency>
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid-spring-boot-starter</artifactId>
    <version>1.2.9</version>
</dependency>

2. application.yml配置

server:
  port: 8226
spring:
  application:
    name: springboot-dynamic-mybatis-plus
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    dynamic:
      primary: master
      strict: true #严格匹配数据源
      datasource:
        master:
          url: jdbc:mysql://localhost:3306/dynamic-master?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=true&serverTimezone=GMT%2B8
          username: root
          password: LIU81&yj
          driver-class-name: com.mysql.cj.jdbc.Driver
        slave:
          url: jdbc:mysql://localhost:3306/dynamic-slave?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=true&serverTimezone=GMT%2B8
          username: root
          password: LIU81&yj
          driver-class-name: com.mysql.cj.jdbc.Driver
      druid:
        initial-size: 5 #初始连接数
        min-idle: 10 #最小连接池
        max-active: 20 #最大连接池
        max-wait: 60000 #连接等待超时时间
        time-between-eviction-runs-millis: 60000 #检测间隔时间,毫秒
        min-evictable-idle-time-millis: 300000 #连接池最小生存时间,毫秒
        max-evictable-idle-time-millis: 900000 #连接池最大生存时间,毫秒
        validation-query: SELECT 1 FROM DUAL #连接检测

mybatis-plus:
  mapper-locations: classpath*:/mapper/**/*.xml
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl

3. 引入注解动态切换数据源

只需要在业务接口实现类上引入@DS()注解即可

@Service
@DS(value = "master")
public class CustomerServiceImpl extends ServiceImpl<CustomerMapper, Customer> implements CustomerService {
}

若需要使用到事务,只需要在最外层加注解@DSTransactional即可

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