通过将日期转换为字符串格式然后解析它，从 excel 读取 java 中的日期时间时遇到问题

Question

Trying to store date time from excel to setter using poi and LocalDateTime and DateTimeFormatter.

    DateTimeFormatter format=DateTimeFormatter.ofPattern("MM/dd/yyyy hh:mm:ss");
    LocalDateTime 
    dateObj=LocalDateTime.parse(row.getCell(2).getLocalDateTimeCellValue().toString(),format);
    dto.setDate(dateObj);

The output is:

    java.time.format.DateTimeParseException: Text '2023-01-22T00:00' could not be parsed at index 2

Please advise me what to do? In the excel file the date is stored in 1/22/2023 12:00:00 AM

Answer 1

You are using DateTimeFormatter for the wrong purpose. Instead of formatting a LocalDateTime object, you are trying to parse a string unnecessarily. You need a formatted String which you can do as follows:

LocalDateTime dateObj = row.getCell(2).getLocalDateTimeCellValue();
DateTimeFormatter format = DateTimeFormatter.ofPattern("MM/dd/yyyy HH:mm:ss", Locale.ENGLISH);
String formatted = dateObj.format(format);

Learn more about the modern Date-Time API from Trail: Date Time .