问题
On a project with Talend Open Studio (an Open Source code-generating ETL tool), I am getting errors parsing incoming date strings like "3/14/1967 0:00:00" (note the single-digit month).
Digging into the code, I can see it is using java.text.SimpleDateFormat. So the date pattern string I expect I need to use is "d-M-yyyy H:mm:ss"... but it keeps giving me errors like "Unparseable date: 3/14/1967 0:00:00".
I assume that SimpleDateFormat can deal with the single-or-double digit problem. Do I need a different date pattern? (Sure, I could do pre-processing to tweak the values before Java attempts to read the strings as Dates, but it shouldn't be necessary!)
回答1:
Are you sure you actually need to use d-M-yyyy rather than M/d/yyyy? I can see why it would have a problem with "3/14/1967"... what date did you expect that to be? Note that not only have you got "d" and "M" the wrong way round, but you've also specified "-" instead of "/" as the separator.
来源：https://stackoverflow.com/questions/3936473/parse-date-with-possible-single-digit-month-day-hour-using-java-text-simpledatef