Reading XLSX data in SpringBatch

Question

I have an xlsx file that has to be read and the date field needs to be written to MYSQL DateTime column.

The date in the excel file is in the format " 2018-08-06 16:32:58"

But when I read it using PoiItemReader and then convert it in a custom rowmapper, I get the below exception :

java.text.ParseException: Unparseable date: "1533553378000"
    at java.text.DateFormat.parse(DateFormat.java:366)
    at org.springframework.batch.item.excel.RowMapperImpl.mapRow(RowMapperImpl.java:63)

I feel that this is due to PoiItemReader not being able to read the date field correctly. Please note that I have tried converting it into sql date using SDF.

Code: https://github.com/vishwabhat19/TimeWorkedData.git

Should i be using XSSFWorkbook instead ? And if I do how would i push this into a Reader? My project is a spring batch project and it needs a InputReader object.

Thank you in advance.