String转Date, Timestamp

1. String to Date(java.util.Date同时包含日期和时间，而java.sql.Date仅包含日期)

2. Date to Timestamp
   借助SimpleDateFormat

   String str = "2017-09-15 10:50:00";
   SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
   try {
          Date date = sf.parse(str);
          System.out.println(date);
          Timestamp t1 = new Timestamp(date.getTime());
          System.out.println(t1);
   } catch (Exception e) {
          e.printStackTrace();
   }
   

   输出

   Fri Sep 15 10:50:00 CST 2017
   2017-09-15 10:50:00.0

3. Date to String

   Date date = new Date();   
   
   DateFormat format = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
   
   String str = format.format(date); 

4. String to Timestamp
   (1)

   String str = "2015-02-25 11:11:11";  
   Timestamp t = Timestamp.valueOf(str); 

   (2)String -> Date -> Timestamp

   SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");  
   try {  
       Date date = sf.parse(str);  
       System.out.println(date);  
       Timestamp t1 = new Timestamp(date.getTime());  
       System.out.println(t1);  
   } catch (ParseException e) {  
       e.printStackTrace();  
   }  
   

   注意SimpleDateFormat的format和parse方法