Time格式转换

1.将"Thu Apr 30 01:33:41 +0000 2009"转换为"yyyy年MM月dd日 HH时mm分ss秒"

  
    

   
      
   
     public
   
      
   
     static
   
      String getDisplayDateStr(String dateStr){

   
      Date dd 
   
     =
   
      
   
     new
   
      Date(dateStr);
 SimpleDateFormat myFmt
   
     =
   
     new
   
      SimpleDateFormat(
   
     "
   
     yyyy年MM月dd日 HH时mm分ss秒
   
     "
   
     ); 
 String str 
   
     =
   
      
   
     ""
   
     ;
 
   
     try
   
     {
 str 
   
     =
   
      myFmt.format(dd); 
 }
   
     catch
   
     (Exception e){
 e.printStackTrace();
 }
 dout(str);
 
   
     return
   
      str;
 }
 
  
    

2.输入"Thu Apr 30 01:33:41 +0000 2009" 返回Date

  
    

   
      
   
     public
   
      
   
     static
   
      Date str2Date(String dateStr){
 
   
     return
   
      
   
     new
   
      Date(dateStr);
 }
  
    

3.传入一个Date，判断是多久前，返回示例"4小时前"

  
    

   
     public
   
      
   
     static
   
      String getHowLongStr(Date date){
 String rs 
   
     =
   
      
   
     ""
   
     ;
 Long i 
   
     =
   
      date.getTime();
 Date now 
   
     =
   
      
   
     new
   
      Date();
 Long j 
   
     =
   
      now.getTime();
 dout(j 
   
     -
   
      i);
 
   
     long
   
      day 
   
     =
   
      
   
     1000
   
      
   
     *
   
      
   
     60
   
      
   
     *
   
      
   
     60
   
      
   
     *
   
      
   
     24
   
     ;
 
   
     long
   
      hour 
   
     =
   
      
   
     1000
   
      
   
     *
   
      
   
     60
   
      
   
     *
   
      
   
     60
   
     ;
 
   
     long
   
      min 
   
     =
   
      
   
     1000
   
      
   
     *
   
      
   
     60
   
     ;
 
   
     long
   
      sec 
   
     =
   
      
   
     1000
   
     ;
 
   
     if
   
      (((j
   
     -
   
     i)
   
     /
   
     day)
   
     >
   
     0
   
     )
 rs 
   
     =
   
      ((j
   
     -
   
     i)
   
     /
   
     day)
   
     +
   
     "
   
     天前
   
     "
   
     ;
 
   
     else
   
      
   
     if
   
      (((j
   
     -
   
     i)
   
     /
   
     hour)
   
     >
   
     0
   
     )
 rs 
   
     =
   
      ((j
   
     -
   
     i)
   
     /
   
     hour)
   
     +
   
     "
   
     小时前
   
     "
   
     ;
 
   
     else
   
      
   
     if
   
      (((j
   
     -
   
     i)
   
     /
   
     min)
   
     >
   
     0
   
     )
 rs 
   
     =
   
      ((j
   
     -
   
     i)
   
     /
   
     min)
   
     +
   
     "
   
     分钟前
   
     "
   
     ;
 
   
     else
   
      
   
     if
   
      (((j
   
     -
   
     i)
   
     /
   
     sec)
   
     >
   
     0
   
     )
 rs 
   
     =
   
      ((j
   
     -
   
     i)
   
     /
   
     sec)
   
     +
   
     "
   
     秒前
   
     "
   
     ;
 
   
     return
   
      rs;
 }
  
    

4.number型的直接换换成时间Date类型

  
    

   
     long
   
      myDate 
   
     =
   
      
   
     1270202674000L
   
     ; 
SimpleDateFormat fm1 
   
     =
   
      
   
     new
   
      SimpleDateFormat(
   
     "
   
     MM
   
     "
   
     +
   
     "
   
     月
   
     "
   
     +
   
     "
   
     dd
   
     "
   
     +
   
     "
   
     日
   
     "
   
     ); 
String date 
   
     =
   
      fm1.format(myDate); 
  
    

5.字符串转换时间

  
    

   
     String unixDate 
   
     =
   
      
   
     "
   
     1259200976
   
     "
   
     ; 
SimpleDateFormat fm1 
   
     =
   
      
   
     new
   
      SimpleDateFormat(
   
     "
   
     dd/MM/yyyy HH:mm:ss
   
     "
   
     ); 
SimpleDateFormat fm2 
   
     =
   
      
   
     new
   
      SimpleDateFormat(
   
     "
   
     yyyy-MM-dd hh:mm:ss
   
     "
   
     ); 

   
     long
   
      unixLong 
   
     =
   
      
   
     0
   
     ; 
String date 
   
     =
   
      
   
     ""
   
     ; 
unixLong 
   
     =
   
      Long.parseLong(unixDate) 
   
     *
   
      
   
     1000
   
     ; 
date 
   
     =
   
      fm1.format(unixLong); 
date 
   
     =
   
      fm2.format(
   
     new
   
      Date(date)); 
  
    

部分引用http://www.cnblogs.com/tt_mc/archive/2010/08/25/1808326.html#2051365