spring boot+mybatis-plus配置读写分离

程序员阿明2024-01-25 14:05

对于mysql主从机制的读写分离，对于写操作写入主库，读取操作读取从库

一、安装依赖

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<dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>dynamic-datasource-spring-boot-starter</artifactId>
            <version>3.3.6</version>
        </dependency>

二、配置文件配置数据源

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spring:
  datasource:
    dynamic:
      #默认数据源
      primary: master
      datasource:
        master:
          username: root
          password: xxxxx
          driver-class-name: com.mysql.cj.jdbc.Driver
          url: jdbc:mysql://localhost:3306/xx?useUnicode=true&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=GMT%2B8&allowMultiQueries=true&useUnicode=true&characterEncoding=UTF-8
        slave:
          username: root
          password: xxx
          driver-class-name: com.mysql.cj.jdbc.Driver
          url: jdbc:mysql://localhost:3306/xx?useUnicode=true&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=GMT%2B8&allowMultiQueries=true&useUnicode=true&characterEncoding=UTF-8

三、在service，如果是读取操作的话，则需要加上注解@DS("slave")即可，可看如下示例

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@Service
public class TUserServiceImpl extends ServiceImpl<TUserMapper, TUser> implements ITUserService {

    //读取走从库
    @Override
    @DS("slave")
    public List<TUser> getUserList(){
        return baseMapper.selectList(null);
    }

    //写操作默认走主库
    @Override
    @Transactional
    public String adUser(TUser user){
        baseMapper.insert(user);
        return "OK";
    }
}