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

spring:
  datasource:
    dynamic:
      primary: master #设置默认的数据源或者数据源组,默认值即为master
      datasource:
        master:
          username: root
          password: 123456
          driver-class-name: com.mysql.jdbc.Driver
          url: jdbc:mysql://xx.xx.xx.xx:3306/dynamic
        slave_1:
          username: root
          password: 123456
          driver-class-name: com.mysql.jdbc.Driver
          url: jdbc:mysql://xx.xx.xx.xx:3307/dynamic
        slave_2:
          username: root
          password: 123456
          driver-class-name: com.mysql.jdbc.Driver
          url: jdbc:mysql://xx.xx.xx.xx:3308/dynamic
       #......省略
       #以上会配置一个默认库master，一个组slave下有两个子库slave_1,slave_2

# 多主多从                      纯粹多库（记得设置primary）                   混合配置
spring:                               spring:                               spring:
  datasource:                           datasource:                           datasource:
    dynamic:                              dynamic:                              dynamic:
      datasource:                           datasource:                           datasource:
        master_1:                             mysql:                                master:
        master_2:                             oracle:                               slave_1:
        slave_1:                              sqlserver:                            slave_2:
        slave_2:                              postgresql:                           oracle_1:
        slave_3:                              h2:                                   oracle_2:

@Service
@DS("slave")
public class UserServiceImpl implements UserService {

  @Autowired
  private JdbcTemplate jdbcTemplate;

  public List<Map<String, Object>> selectAll() {
    return  jdbcTemplate.queryForList("select * from user");
  }
  
  @Override
  @DS("slave_1")
  public List<Map<String, Object>> selectByCondition() {
    return  jdbcTemplate.queryForList("select * from user where age >10");
  }
}

@DS("slave")
public interface UserMapper {

  @Insert("INSERT INTO user (name,age) values (#{name},#{age})")
  boolean addUser(@Param("name") String name, @Param("age") Integer age);

  @Update("UPDATE user set name=#{name}, age=#{age} where id =#{id}")
  boolean updateUser(@Param("id") Integer id, @Param("name") String name, @Param("age") Integer age);

  @Delete("DELETE from user where id =#{id}")
  boolean deleteUser(@Param("id") Integer id);

  @Select("SELECT * FROM user")
  @DS("slave_1")
  List<User> selectAll();
}