Java - Can milliseconds be removed from the displayed time?

Question

The time in the database is the acquisition time of DateTime type {code...} Can it be removed? It’s so ugly.

大家讲道理 · Answer

It seems that when Timestamp is converted to String, the toString method of Timestamp is directly called.
The easiest way is to find the display place and change String str = timestamp.toString() similar code to

String str = timestamp.toString();
str = str.substring(0, str.length() - 4);

代言 · Answer

Use SimpleDateFormat to convert Timestamp to String type.

public Timestamp getDatetime() {
    SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    Timestamp now = new Timestamp(System.currentTimeMillis());
    String str = df.format(now);
    
    return str;
}