日期在String和Date类型转换；ParsePosition，formatter.parse，java.sql.Timestamp

将String型的“****年**月**日”转换成Date型

private Date DTStringtoDate(String dtToDate){
  
   SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
   ParsePosition pos = new ParsePosition(0);   
   java.util.Date datetime = formatter.parse(dtToDate, pos); 
   java.sql.Timestamp ts = null;  
  
   if(datetime != null){ 
   
    ts = new java.sql.Timestamp(datetime.getTime());
   }
  
   return ts; 
}private Date D