什么是最好的方法转换格式的字符串' 1月2日，2010年'到一个日期在Java?
最后，我希望将月、日和年分解为整数，以便我可以使用
Date date = new Date();
date.setMonth()..
date.setYear()..
date.setDay()..
date.setlong currentTime = date.getTime();
将日期转换为时间。
当前回答
DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
Date date;
try {
date = dateFormat.parse("2013-12-4");
System.out.println(date.toString()); // Wed Dec 04 00:00:00 CST 2013
String output = dateFormat.format(date);
System.out.println(output); // 2013-12-04
}
catch (ParseException e) {
e.printStackTrace();
}
这对我来说很有效。
其他回答
From Date to String
SimpleDateFormat sdf = new SimpleDateFormat("dd-MM-yyyy");
return sdf.format(date);
SimpleDateFormat sdf = new SimpleDateFormat(datePattern);
return sdf.parse(dateStr);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
SimpleDateFormat newSdf = new SimpleDateFormat("dd-MM-yyyy");
Date temp = sdf.parse(dateStr);
return newSdf.format(temp);
源链接。
在处理SimpleDateFormat类时，重要的是要记住Date不是线程安全的，不能与多个线程共享单个Date对象。
“m”和“m”之间也有很大的区别，小写字母用于表示分钟，大写字母用于表示月。“d”和“d”也是一样。这可能会导致经常被忽视的细微错误。有关更多细节，请参阅Javadoc或Java中字符串转换为日期的指南。
此外，SimpleDateFormat对于某些客户端技术(如GWT)是不可用的。
使用Calendar.getInstance()是个好主意，您的要求是比较两个日期;长时间约会。
试试这个
String date = get_pump_data.getString("bond_end_date");
DateFormat format = new SimpleDateFormat("yyyy-MM-dd", Locale.ENGLISH);
Date datee = (Date)format.parse(date);
啊，又是Java Date的讨论。为了处理日期操作，我们使用date、Calendar、GregorianCalendar和SimpleDateFormat。例如，用你一月份的日期作为输入:
Calendar mydate = new GregorianCalendar();
String mystring = "January 2, 2010";
Date thedate = new SimpleDateFormat("MMMM d, yyyy", Locale.ENGLISH).parse(mystring);
mydate.setTime(thedate);
//breakdown
System.out.println("mydate -> "+mydate);
System.out.println("year -> "+mydate.get(Calendar.YEAR));
System.out.println("month -> "+mydate.get(Calendar.MONTH));
System.out.println("dom -> "+mydate.get(Calendar.DAY_OF_MONTH));
System.out.println("dow -> "+mydate.get(Calendar.DAY_OF_WEEK));
System.out.println("hour -> "+mydate.get(Calendar.HOUR));
System.out.println("minute -> "+mydate.get(Calendar.MINUTE));
System.out.println("second -> "+mydate.get(Calendar.SECOND));
System.out.println("milli -> "+mydate.get(Calendar.MILLISECOND));
System.out.println("ampm -> "+mydate.get(Calendar.AM_PM));
System.out.println("hod -> "+mydate.get(Calendar.HOUR_OF_DAY));
然后你可以用类似这样的东西来操纵它:
Calendar now = Calendar.getInstance();
mydate.set(Calendar.YEAR,2009);
mydate.set(Calendar.MONTH,Calendar.FEBRUARY);
mydate.set(Calendar.DAY_OF_MONTH,25);
mydate.set(Calendar.HOUR_OF_DAY,now.get(Calendar.HOUR_OF_DAY));
mydate.set(Calendar.MINUTE,now.get(Calendar.MINUTE));
mydate.set(Calendar.SECOND,now.get(Calendar.SECOND));
// or with one statement
//mydate.set(2009, Calendar.FEBRUARY, 25, now.get(Calendar.HOUR_OF_DAY), now.get(Calendar.MINUTE), now.get(Calendar.SECOND));
System.out.println("mydate -> "+mydate);
System.out.println("year -> "+mydate.get(Calendar.YEAR));
System.out.println("month -> "+mydate.get(Calendar.MONTH));
System.out.println("dom -> "+mydate.get(Calendar.DAY_OF_MONTH));
System.out.println("dow -> "+mydate.get(Calendar.DAY_OF_WEEK));
System.out.println("hour -> "+mydate.get(Calendar.HOUR));
System.out.println("minute -> "+mydate.get(Calendar.MINUTE));
System.out.println("second -> "+mydate.get(Calendar.SECOND));
System.out.println("milli -> "+mydate.get(Calendar.MILLISECOND));
System.out.println("ampm -> "+mydate.get(Calendar.AM_PM));
System.out.println("hod -> "+mydate.get(Calendar.HOUR_OF_DAY));
