@log注解是若以自定义的注解类，用于接口调用记录日志
@Log(title = "参数管理", businessType = BusinessType.EXPORT)
@PreAuthorize("@ss.hasPermi('system:config:export')")
@PostMapping("/export")
public void export(HttpServletResponse response, SysConfig config)
{
List<SysConfig> list = configService.selectConfigList(config);
ExcelUtil<SysConfig> util = new ExcelUtil<SysConfig>(SysConfig.class);
util.exportExcel(response, list, "参数数据");
}