下拉框combobox在刚加载后，怎么设定默认选中的项目
悬赏：20飞吻
如下图， 怎么默认选中 第一个项目
基本
文件
流程
错误
SQL
调试
- 请求信息 : 2026-04-22 06:05:02 HTTP/1.1 GET : https://ask.jeasyui.cn/article/4574d2cb1796c8e85b7ed16c921c31f2.html
- 运行时间 : 0.067187s [ 吞吐率：14.88req/s ] 内存消耗：5,365.19kb 文件加载：166
- 查询信息 : 0 queries
- 缓存信息 : 0 reads,0 writes
- 会话信息 : SESSION_ID=f1ddfd3fb8e1d54569caa21bdd3bf207
- CONNECT:[ UseTime:0.000491s ] mysql:host=172.18.134.35;port=3329;dbname=zuoyo_website;charset=utf8
- SHOW FULL COLUMNS FROM `con_document` [ RunTime:0.001477s ]
- SHOW FULL COLUMNS FROM `con_document_article` [ RunTime:0.000921s ]
- SHOW FULL COLUMNS FROM `con_document_reply` [ RunTime:0.000962s ]
- UPDATE `con_document` SET `view_num` = `view_num` + 1 WHERE `uuid` = '4574d2cb1796c8e85b7ed16c921c31f2' [ RunTime:0.002931s ]
- CONNECT:[ UseTime:0.000444s ] mysql:host=172.18.134.35;port=3329;dbname=zuoyo_website;charset=utf8
- SHOW FULL COLUMNS FROM `sys_log` [ RunTime:0.001127s ]
- INSERT INTO `sys_log` SET `description` = 'UPDATE `con_document` SET `view_num` = `view_num` + 1 WHERE `uuid` = \'4574d2cb1796c8e85b7ed16c921c31f2\'' , `uuid` = '05bdd2343fb9f2507a39665d8a65d7e7' , `creator_id` = '' , `create_time` = '2026-04-22 06:05:02' , `ip` = '216.73.217.23' [ RunTime:0.002781s ]
- SELECT `d`.`uuid`,`d`.`cid`,`d`.`title`,`d`.`experience`,`d`.`view_num`,`d`.`comment_num`,`d`.`zhiding`,`d`.`jinghua`,`d`.`yijie`,`d`.`create_time`,`d`.`creator_id`,`m`.`nick_name`,`m`.`rank`,`m`.`avatar_url` FROM `con_document` `d` INNER JOIN `zuoyo_website`.`sys_member` `m` ON `d`.`creator_id`=`m`.`uuid` WHERE `d`.`uuid` = '4574d2cb1796c8e85b7ed16c921c31f2' LIMIT 1 [ RunTime:0.000311s ]
- SELECT `content` FROM `con_document_article` WHERE `puuid` = '4574d2cb1796c8e85b7ed16c921c31f2' LIMIT 1 [ RunTime:0.000213s ]
- SELECT * FROM `con_document` ORDER BY `view_num` DESC LIMIT 10 [ RunTime:0.002410s ]
- SELECT * FROM `con_document` ORDER BY `comment_num` DESC LIMIT 10 [ RunTime:0.002437s ]
0.074374s
