springboot @DS注解数据源切换

        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>dynamic-datasource-spring-boot-starter</artifactId>
            <version>3.0.0</version>
        </dependency>

spring:
  datasource:
    #配置hikari连接池
    hikari:
      minimum-idle: 4
      maximum-pool-size: 16
      connection-timeout: 10000
      idle-timeout: 30000
      connection-init-sql: set names utf8mb4
    #动态数据源配置
    dynamic:
      #主数据源，默认启用
      primary: business
      datasource:
        #数据源1
        business:
          driver-class-name: com.mysql.cj.jdbc.Driver
          url: jdbc:mysql://localhost:3306/db_business?useUnicode=true&characterEncoding=utf-8
          username: ****
          password: ****
        #数据源2
        user:
          driver-class-name: com.mysql.cj.jdbc.Driver
          url: jdbc:mysql://localhost:3306/db_user?useUnicode=true&characterEncoding=utf-8
          username: ****
          password: ****
        #数据源3
        order:
          driver-class-name: com.mysql.cj.jdbc.Driver
          url: jdbc:mysql://localhost:3306/db_order?useUnicode=true&characterEncoding=utf-8
          username: ****
          password: ****

@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");
  }