如何在Java中将字符串转换为日期格式？

Question

How to convert a String to DateFormat in java?

I am writing a application where I want to convert a string "20050105000200" to "2005-01-05 00:02:00". Is there a direct way to do it in Java? I want both input and output in String. Please let me know if there is a way to do it directly.

Can you give me some simple codes?

Thanks.

Answer 1

You can use SimpleDateFormat to parse the input date, and then again to format the output

SimpleDateFormat inFmt = new SimpleDateFormat("yyyyMMddHHmmss");
SimpleDateFormat outFmt = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date d = inFmt.parse("20050105000200");
System.out.println(outFmt.format(d));

Answer 2

You should first parse it to a date like this:

http://www.exampledepot.com/egs/java.text/parsedate.html

and then format it again like this:

http://www.exampledepot.com/egs/java.text/formatdate.html

Answer 3

This example might help you

   String str_date="11-June-07";
 DateFormat formatter ; 
 Date date ; 
  formatter = new SimpleDateFormat("dd-MMM-yy");
  date = (Date)formatter.parse(str_date);  

Answer 4

Use a DateFormat to parse() this String to a Date object. Use a different DateFormat to format() the Date to the String representation you want.

See this

Answer 5

您可以使用simpledateformat类来执行此操作

Answer 6

Use SimpleDateFormat . Haven't tried on my IDE, but it goes something like this:

SimpleDateFormat fromUser = new SimpleDateFormat("yyyyMMddHHmmss");
SimpleDateFormat myFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

String reformattedStr = myFormat.format(fromUser.parse("20050105000200"));
System.out.println(reformattedStr);