java 获取当前时间的三种方法

java 获取当前时间的三种方法
https://blog.csdn.net/c851204293/article/details/91801973

1.通过Util包中的Date获取

   
   
   
 
    
 
     
 
      
 
     
 
     
 
      
 
       Date 
       date 
       = 
       new 
       Date(); 
      
 
     
 
    
 
     
 
      
 
     
 
     
 
      

        SimpleDateFormat dateFormat= 
       new 
       SimpleDateFormat( 
       "yyyy-MM-dd :hh:mm:ss"); 
      
 
     
 
    
 
     
 
      
 
     
 
     
 
      

        System.out.println(dateFormat.format(date)); 
      
 
     
 
   
  
  
  

2.通过Util包的Calendar 获取

   
   
   
 
    
 
     
 
      
 
     
 
     
 
      

        Calendar calendar= Calendar.getInstance(); 
      
 
     
 
    
 
     
 
      
 
     
 
     
 
      

        SimpleDateFormat dateFormat= 
       new SimpleDateFormat( 
       "yyyy-MM-dd :hh:mm:ss"); 
      
 
     
 
    
 
     
 
      
 
     
 
     
 
      

        System.out.println(dateFormat.format(calendar. 
       get 
       Time())); 
      
 
     
 
   
  
  
  

3.通过Util包的Calendar 获取时间，分别获取年月日时分秒

   
   
   
 
    
 
     
 
      
 
     
 
     
 
      

        Calendar cal=Calendar.getInstance();       
      
 
     
 
    
 
     
 
      
 
     
 
     
 
      
 
       int y=cal. 
       get(Calendar.YEAR);       
      
 
     
 
    
 
     
 
      
 
     
 
     
 
      
 
       int m=cal. 
       get(Calendar.MONTH);       
      
 
     
 
    
 
     
 
      
 
     
 
     
 
      
 
       int d=cal. 
       get(Calendar.DATE);       
      
 
     
 
    
 
     
 
      
 
     
 
     
 
      
 
       int h=cal. 
       get(Calendar.HOUR_OF_DAY);       
      
 
     
 
    
 
     
 
      
 
     
 
     
 
      
 
       int mi=cal. 
       get(Calendar.MINUTE);       
      
 
     
 
    
 
     
 
      
 
     
 
     
 
      
 
       int s=cal. 
       get(Calendar.SECOND);       
      
 
     
 
    
 
     
 
      
 
     
 
     
 
      

        System. 
       out.println( 
       "现在时刻是"+y+ 
       "年"+m+ 
       "月"+d+ 
       "日"+h+ 
       "时"+mi+ 
       "分"+s+ 
       "秒"); 
      
 
     
 
   
  
  
  

 

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参考：https://blog.csdn.net/qq_34682683/article/details/78716547