{"timestamp":"2026-10-01 10:23:45","level":"INFO","message":"用户登录成功","user":"老三"}
{"timestamp":"2026-10-02 10:24:01","level":"ERROR","message":"数据库连接失败","user":"老四"}
{"timestamp":"2026-10-03 10:25:12","level":"INFO","message":"用户登出","user":"老八"}
{"timestamp":"2026-10-04 10:26:30","level":"ERROR","message":"超时","user":"老六"}
{"timestamp":"2026-10-05 10:27:00","level":"INFO","message":"任务完成","user":"老王"}