Java中时间类使用方法总结

//java.util.Date; Date类用法
Date date = new Date();
System.out.println(date);
System.out.println("=============================");

//java.util.Calendar; Calendar类用法
Calendar calendar = Calendar.getInstance();
calendar.setTime(new Date());
System.out.println(calendar.get(Calendar.YEAR) + "年" + calendar.get(Calendar.MONTH) + "月" + calendar.get(Calendar.DAY_OF_MONTH) + "日");
System.out.println("=============================");

//java.util.GregorianCalendar; GregorianCalendar类用法
GregorianCalendar gcall1 = new GregorianCalendar(2011,5,1);
GregorianCalendar gcall2 = new GregorianCalendar(Locale.CHINESE);
System.out.println("gcall1:" + gcall1.get(Calendar.YEAR) + " " + gcall1.get(Calendar.MONTH) + " " + gcall1.get(Calendar.DAY_OF_MONTH));
System.out.println("gcall12:" + gcall2.get(Calendar.YEAR) + " " + gcall2.get(Calendar.MONTH) + " " + gcall2.get(Calendar.DAY_OF_MONTH));
System.out.println("=============================");

//java.text.DateFormat; DateFormat类的用法
DateFormat format = DateFormat.getInstance();
System.out.println(format.format(new Date()));
System.out.println("=============================");
//DateFormat中还定义了多个getDateInstance方法，用来格式化日期信息，如getDateInstance(int style, Locale alocale),可以指定格式化的风格以及Local信息
DateFormat format2 = DateFormat.getDateInstance(DateFormat.SHORT,Locale.US);
DateFormat format3 =DateFormat.getDateInstance(DateFormat.LONG,Locale.CHINESE);
DateFormat format4 = DateFormat.getDateInstance(DateFormat.FULL,Locale.FRANCE);
DateFormat format5 = DateFormat.getDateInstance(DateFormat.MEDIUM,Locale.JAPAN);
System.out.println(format2.format(new Date()));
System.out.println(format3.format(new Date()));
System.out.println(format4.format(new Date()));
System.out.println(format5.format(new Date()));
System.out.println("=============================");

//SimpleDateFormat类是DateFormat类的子类，可是使用任何用户定义的日期时间格式的模式进行格式化。
SimpleDateFormat sdf1 = new SimpleDateFormat("yyyy年MM月dd日hh时mm分ss秒EE",Locale.CHINA);
System.out.println(sdf1.format(new Date()));