Special characters of Java date formatting

Formatting dates in Java is relatively straightforward, and the usual code is as follows:

<span style= "White-space:pre" ></span>string pattern = "YYYY year mm month DD Day";        SimpleDateFormat SDF = new SimpleDateFormat (pattern);        System.out.println (Sdf.format (New Date ()));

This allows you to simply format the date with the result: January 29, 2015

However, in recent work encountered such a requirement, the format is required to display the style is: Year W week, that is also the above date as an example, the format to be displayed is: 15w05.

There is no way to format a normal method, because W represents the week in the format rule. At that time, two were used to stitch together after formatting.

<span style= "White-space:pre" ></span>string pattern1 = "yy";        SimpleDateFormat sdf1 = new SimpleDateFormat (PATTERN1);        String pattern2 = "ww";        SimpleDateFormat sdf2 = new SimpleDateFormat (pattern2);        System.out.println (Sdf1.format (new Date ()) + "W" +sdf2.format (new Date ()));

Today suddenly found that there is actually a simple way to achieve, just use the single quotation mark in the W can be. The following code

String pattern3 = "yy ' W ' ww";        SimpleDateFormat sdf3 = new SimpleDateFormat (PATTERN3);        System.out.println (Sdf3.format (New Date ()));

Special characters of Java date formatting