Date

package Date;
import java.text.DateFormat;  
import java.text.SimpleDateFormat;  
import java.util.Calendar;  
import java.util.Date;  
import java.util.Locale;  
  
public class DateFormatDemo {  
  
  /**  
  * 日期格式化  
  */  
  public static void main(String[] args) {  
  //Date now = new Date();  
  //System.out.println(now);  
   
  //useDateFormat();  
  //useSimpleDateFormat();  
  useStringFormat();  
  
  }  
  
  public static void useStringFormat() {  
  long now = System.currentTimeMillis();  
  Date dd = new Date();  
  Calendar cal = Calendar.getInstance();  
  System.out.println(String.format("my age is %x", 100));  
  System.out.println(String.format("%tY", now));  
  System.out.println(String.format("%tY年%1$tm月",now));  
  System.out.println(String.format("%tY年%  System.out.println(String.format("%tY年%  System.out.println(String.format("%tF %   
  }  
  
  public static void useSimpleDateFormat() {  
  Date now = new Date();  
   
  //2009#05#07 [19]<=>[45]>>(26)  
  SimpleDateFormat sdf = new SimpleDateFormat("yyyy#MM#dd [HH]<=>[mm]>>(ss)");  
  System.out.println(sdf.format(now));  
  sdf.applyPattern("yyyy年MM月dd日 HH:mm:ss");  
  System.out.println(sdf.format(now));  
  }  
  
  public static void useDateFormat() {  
  System.out.println("使用DateFormat格式化日期对象...");  
  Date now = new Date();  
  DateFormat df = DateFormat.getDateInstance(DateFormat.FULL); //仅格式化日期  
  String str = df.format(now);  
  System.out.println(str);  
   
  df = DateFormat.getDateInstance(DateFormat.LONG,Locale.US);  
  System.out.println(df.format(now));  
   
  df = DateFormat.getDateInstance(DateFormat.MEDIUM);  
  System.out.println(df.format(now));  
   
  df = DateFormat.getDateInstance(DateFormat.SHORT);  
  System.out.println(df.format(now));  
   
  System.out.println("--------------------------------");  
   
  df = DateFormat.getTimeInstance(DateFormat.FULL);  
  System.out.println(df.format(now));  
   
  df = DateFormat.getTimeInstance(DateFormat.LONG,Locale.US);  
  System.out.println(df.format(now));  
   
  df = DateFormat.getTimeInstance(DateFormat.MEDIUM);  
  System.out.println(df.format(now));  
   
  df = DateFormat.getTimeInstance(DateFormat.SHORT);  
  System.out.println(df.format(now));  
   
  System.out.println("------------------------");  
  df = DateFormat.getDateTimeInstance(DateFormat.FULL, DateFormat.MEDIUM);  
  System.out.println(df.format(now));  
  }  
  
}