DateFormat不以所需格式给出日期

Question

I want to get the current date in the following format yyyy_mm_dd

Am Using the below code

DateFormat date = new SimpleDateFormat("yyyy_mm_dd");
Date datetoday = new Date();
System.out.println(date.format(datetoday));

But its giving the result in this manner - 2013_56_25

However, it should give the result like 2013_03_25

Infact, the mm value varies every time I run it. My system's date is of the format - 3/25/2013. (Idk if it has some relation with this)

What is the possible problem with this ?

Answer 1

使用大写字母MM ，小写字母mm持续几分钟。

DateFormat date = new SimpleDateFormat("yyyy_MM_dd");

Answer 2

月份是M，而不是m（分钟）

Answer 3

Use MM instead of mm ; lower case is for mintues; Uppercase for Months

Answer 4

You will have to use MM and not mm. Please refer the table from the image below

Answer 5

I got Different Result after parse the java.util.Date to java.sql.Date String date="2012-05-02";

SimpleDateFormat df=new SimpleDateFormat("yyyy-mm-dd");

i got as a result is:2012-01-01

means 1 Day is less than actually required.