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.
     * 

     * 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.
     * 

     * 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.
     * 

     * This maps as follows:
     * 

     * 
EST - -05:00
     * 
HST - -10:00
     * 
MST - -07:00
     * 
ACT - Australia/Darwin
     * 
AET - Australia/Sydney
     * 
AGT - America/Argentina/Buenos_Aires
     * 
ART - Africa/Cairo
     * 
AST - America/Anchorage
     * 
BET - America/Sao_Paulo
     * 
BST - Asia/Dhaka
     * 
CAT - Africa/Harare
     * 
CNT - America/St_Johns
     * 
CST - America/Chicago
     * 
CTT - Asia/Shanghai
     * 
EAT - Africa/Addis_Ababa
     * 
ECT - Europe/Paris
     * 
IET - America/Indiana/Indianapolis
     * 
IST - Asia/Kolkata
     * 
JST - Asia/Tokyo
     * 
MIT - Pacific/Apia
     * 
NET - Asia/Yerevan
     * 
NST - Pacific/Auckland
     * 
PLT - Asia/Karachi
     * 
PNT - America/Phoenix
     * 
PRT - America/Puerto_Rico
     * 
PST - America/Los_Angeles
     * 
SST - Pacific/Guadalcanal
     * 
VST - Asia/Ho_Chi_Minh
     * 
     * The map is unmodifiable.
     */
    public static final Map 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