Get the time value from the database and report an error: Java sql. Timestamp cannot be cast to java. lang.Long

1. Problem description

Convert the queried timestamp type data in the database into long type and report an error.

String type = result.getClass().getName();
if ("java.sql.Timstamp".equalsIgnoreCase(type)) {
      return new Date((Long) result);
}

2. Solution

Because Java sql.Timestamp is Java util. Subclass of date;

So, just put Java sql.Timestamp to Java util.Date type is enough.

String type = result.getClass().getName();
if ("java.sql.Timestamp".equalsIgnoreCase(type)) {
    return (Date)result;
}

Or convert the data to string type output:

String type = result.getClass().getName();

 // Convert Timestamp type to String type (yyyy-MM-dd HH:mm:ss)
  if ("java.sql.Timestamp".equalsIgnoreCase(type)) {
      //java.sql.Timestamp processing logic
     return DateUtil.timeToYmdHmsString((Date)result);
}

The dateutil tool class is as follows:

public class DateUtil {

    private static String defaultYmdHmsPattern = "yyyy-MM-dd HH:mm:ss";

    /**
     * Convert Date to String, format: yyyy-MM-dd HH:mm:ss
      * @param date date type
      * @return String Date format string
     */
    public static String timeToYmdHmsString(Date date) {
        SimpleDateFormat formatter = new SimpleDateFormat(defaultYmdHmsPattern);
        return formatter.format(date);
    }
}