java JDBC与MySQL 关于日间与日期

//MySQL Date类型 -> java.sql.Date
java.sql.Date d = new java.sql.Date(Calendar.getInstance().getTime().getTime());

//MySQL Time类型-> java.sql.Time
Time t = new Time(d.getTime());

//MySQL DateTime类型 -> java.sql.Timestamp
 java.sql.Timestamp = new java.sql.Timestamp(d.getTime())