常见方式

Logger logger = LoggerFactory.getLogger(DruidDataSourceAutoConfigure.class);
logger.info("初始化DruidDataSource");

简便方式

类上加上@Slf4j注解，直接使用log对象

@Slf4j
@Configuration
public class DruidDataSourceAutoConfigure {

    @Bean(initMethod = "init")
    public DataSource dataSource() {
        log.info("初始化DruidDataSource");
        return new DruidDataSourceWrapper();
    }
}