Java中时间类使用方法总结

悠悠 2024-02-17 18:37 11阅读 0赞

//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()));