java8时间api和mysql集成的坑

java8时间api和mysql集成的坑

代码

Timestamp.valueOf(LocalDateTime.now)

现象是时间相差14个小时，想了下，相差14个小时应该是芝加哥时间

跟踪jdk源码,

ZoneId

/**
* A map of zone overrides to enable the short time-zone names to be used.
* <p>
* Use of short zone IDs has been deprecated in {@code java.util.TimeZone}.
* This map allows the IDs to continue to be used via the
* {@link #of(String, Map)} factory method.
* <p>
* This map contains a mapping of the IDs that is in line with TZDB 2005r and
* later, where 'EST', 'MST' and 'HST' map to IDs which do not include daylight
* savings.
* <p>
* This maps as follows:
* <ul>
* <li>EST - -05:00</li>
* <li>HST - -10:00</li>
* <li>MST - -07:00</li>
* <li>ACT - Australia/Darwin</li>
* <li>AET - Australia/Sydney</li>
* <li>AGT - America/Argentina/Buenos_Aires</li>
* <li>ART - Africa/Cairo</li>
* <li>AST - America/Anchorage</li>
* <li>BET - America/Sao_Paulo</li>
* <li>BST - Asia/Dhaka</li>
* <li>CAT - Africa/Harare</li>
* <li>CNT - America/St_Johns</li>
* <li>CST - America/Chicago</li>
* <li>CTT - Asia/Shanghai</li>
* <li>EAT - Africa/Addis_Ababa</li>
* <li>ECT - Europe/Paris</li>
* <li>IET - America/Indiana/Indianapolis</li>
* <li>IST - Asia/Kolkata</li>
* <li>JST - Asia/Tokyo</li>
* <li>MIT - Pacific/Apia</li>
* <li>NET - Asia/Yerevan</li>
* <li>NST - Pacific/Auckland</li>
* <li>PLT - Asia/Karachi</li>
* <li>PNT - America/Phoenix</li>
* <li>PRT - America/Puerto_Rico</li>
* <li>PST - America/Los_Angeles</li>
* <li>SST - Pacific/Guadalcanal</li>
* <li>VST - Asia/Ho_Chi_Minh</li>
* </ul>
* The map is unmodifiable.
*/
public static final Map<String, String> SHORT_IDS;

结果CST是芝加哥时间，然后去mysql中看了一下

mysql> show variables like "%time_zone%";
+------------------+--------+
| Variable_name    | Value  |
+------------------+--------+
| system_time_zone | CST    |
| time_zone        | SYSTEM |
+------------------+--------+
2 rows in set (0.00 sec)

mysql> select curtime();
+-----------+
| curtime() |
+-----------+
| 20:14:19  |
+-----------+
1 row in set (0.00 sec)

坑了吧，这里CST是

China Standard Time

,最后用了SimpleDateFormat加ThreadLocal搞定的