Spring Batch-无法以正确的格式解析日期

Question

In spring batch I'm loading csv file where I'm also parsing dates. Everything seems to be working fine except for one single row where I get exception

Unparseable date: "2014-03-09 02:07:07", format: [yyyy-MM-dd HH:mm:ss]

I've double checked my input file and there are no special/invisible characters in this failed row.

Caused by: java.lang.IllegalArgumentException: Unparseable date: "2014-03-09 02:07:07", format: [yyyy-MM-dd HH:mm:ss]
    at org.springframework.batch.item.file.transform.DefaultFieldSet.parseDate(DefaultFieldSet.java:778)
    at org.springframework.batch.item.file.transform.DefaultFieldSet.readDate(DefaultFieldSet.java:595)

Thanks for help!

---

EDIT

When I change hour in date from 02 to something else (eg '2014-03-09 03 :07:07'), it works. When I then change it manually back to 02 it fails again. How can this be possible? Changing other elements of date does not help. Only changing hour.

I only experience this on our unix server with America/New_York timezone. From my local machine everything is working. JDK version on both are identical.

Answer 1

It was caused by combination of TimeZone settings, daylight saving and SimpleDateFormat.lenient property.

Our linux host has America/New_York timezone.

Date for which I was getting error is 9-MAR-2014 @ 2:07:07 am which is exact date and time when in NYK timezone time shifts 1 hour forward - daylight saving (from 2am to 3am).

Normally when SimpleDateFormat converts such date it automatically changes it to 3am . Setting lenient property to false (default value for is true ) prevents this and throws exception - HOUR_OF_DAY: 2 -> 3 .

This exception is consumed in process and at the end we get only IllegalArgumentException with Unparseable date: "2014-03-09 02:07:07", format: [yyyy-MM-dd HH:mm:ss] message.

Here I'm using spring-boot DefaultFieldSet which has implementation where it is specifically setting lenient to false .

/* ... some other code ... */
private DateFormat dateFormat = new SimpleDateFormat(DEFAULT_DATE_PATTERN);
{
    dateFormat.setLenient(false);
}

/* ... some other code ... */

@Override
public Date readDate(int index, String pattern) {
    SimpleDateFormat sdf = new SimpleDateFormat(pattern);
    sdf.setLenient(false);
    return parseDate(readAndTrim(index), sdf);
}
/* ... some other code ... */

As we are not doing any manipulation with dates in our code, I simply fixed it with changing default timezone to UTC.

TimeZone.setDefault(TimeZone.getTimeZone("UTC"));

Other valid approach would be to write custom implementation of FieldSet .