How to format today's day with SimpleDateFormat? [duplicate]

问题

Hi I am trying to get today's date but not getting proper output

import java.text.DateFormat;
import java.text.SimpleDateFormat;

private static final DateFormat sdf = new SimpleDateFormat("DD/MM/YYYY");
System.out.println("TODAY  :" + sdf.format(new Date()));

output

TODAY  :142/05/2017

Year and month coming properly but why the day is coming like this

回答1:

D is Day in year d is Day in month http://docs.oracle.com/javase/7/docs/api/java/text/SimpleDateFormat.html

EDIT: Also as @JeremyP noticed you can use yyyyfor getting year 'cause Y is Week year

回答2:

Oracle:

SimpleDateFormat is a concrete class for formatting and parsing dates in a locale-sensitive manner. It allows for formatting (date -> text), parsing (text -> date), and normalization.

simple y Year -Year (1996; 96)
capital Y Week year -Year (2009; 09)
simple d Day in month -Number (10)
capital D Day in year -Number (189)
capital M Month in year -Month (July; Jul; 07)

In your code:

SimpleDateFormat("DD/MM/YYYY")

Should be:

SimpleDateFormat("dd/MM/yyyy")

refer documentation for more info

回答3:

According to the javadocs D is for the day in the year and Y is for the week year.

You need to use d (lower case) for Day in month and y (lower case) for Year

This you pattern should look like:

 DateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");

回答4:

Replace DD with dd and YYYY to yyyy. MM is in capital and others are in lowercase.

d = day of the month

D = day of the year

M = month in year

m = minute in hour

y = Year

Y = Week year

private static final DateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");
System.out.println("TODAY  :" + sdf.format(new Date()));

来源：https://stackoverflow.com/questions/44110668/how-to-format-todays-day-with-simpledateformat

标签

java

date

datetime

simpledateformat