SpringBoot使用@DS配置多数据源【mybatisplus druid datasource mysql】

项目最近需要使用多数据源，不同的mapper分别读取不同的链接，本项目使用了mybatisplus druid 来配置多数据源，基于mysql数据库。

1.引入依赖

2.配置文件 application.yaml

3.Mapper中使用@DS切换数据源

4.使用@DS的注意事项

1.引入依赖

        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>dynamic-datasource-spring-boot-starter</artifactId>
            <version>3.3.6</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.5.1</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.2.6</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.32</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>

2.配置文件 application.yaml


spring:
  # 配置数据源信息
  datasource:
    dynamic:
      # 设置默认的数据源或者数据源组
      primary: master
      # 严格匹配数据源,默认false,true未匹配到指定数据源时抛异常,false使用默认数据源
      strict: false
      datasource:
        master:
          url: jdbc:mysql://localhost:3306/master?serverTimezone=GMT%2B8&characterEncoding=utf-8&userSSL=false
          driver-class-name: com.mysql.cj.jdbc.Driver
          username: root
          password: root
        slave:
          url: jdbc:mysql://localhost:3307/slave?serverTimezone=GMT%2B8&characterEncoding=utf-8&userSSL=false
          driver-class-name: com.mysql.cj.jdbc.Driver
          username: root
          password: root

3.Mapper中使用@DS切换数据源

import com.baomidou.dynamic.datasource.annotation.DS;
import com.gzmpc.print.entity.Template;
import org.apache.ibatis.annotations.Mapper;
@Mapper
public interface TestMapper {
@DS("master")
public List getMaster(String parm);
@DS("slave")
public List getSlave(String parm);
}

@DS也可在mapper层、service层使用，默认的master可以不用加@DS