Setting timestamp to current time in Java

Question

I'm trying to set the current datetime in a java EE7 web app to an apache derby database I have.

I'm using timestamp in both java and derby so I don't have to worry about type conversions.

However, the only way I know of to get the current datetime is through calendar.set(Calendar time).

Is there inherent way to set the current datetime for timestamp or will I need to use a converter?

Answer 1

You can use the Date class for initializing to the current time , ie :

Timestamp timestamp = new Timestamp(new Date().getTime());

The java.util.Calendar class is an abstract encapsulation of the Date object. Calendar provides getter and setter for the date fields , nothing more. And it comes at a cost.

In your case using a simple Date is ideal.

Answer 2

使用joda jar并导入所需的包。

DateTime d = new DateTime().withZone(DateTimeZone.forID(TIME_ZONE));

Answer 3

使用以下代码。

Timestamp timestamp = new Timestamp(Calendar.getInstance().getTimeInMillis());