1.將日期類型轉(zhuǎn)換為格式的字符串類型

**java.util.Date中的日期

    Date Date date = new Date();

    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

    String time=sdf.format(date);

2.將字符串類型的轉(zhuǎn)換為指定格式的日期類型(java.util.Date)

    String time = "2009-7-29 14:28:12";

    DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

    Date date = df.parse(time);

    **這里需要拋出ParseException異常

    **若將java.util.Date類型轉(zhuǎn)換成java.sql.Date時(shí),只需添加一行代碼

    **java.sql.Date sqlDate = new java.sql.Date(date.getTime());

3.使用java.sql.Timestamp在java程序中rs.getDate()時(shí)獲取日期的時(shí)、分、秒

    String str = "";

    String format="yyyy-MM-dd HH:mm:ss";

    try {

              //這里與數(shù)據(jù)庫的連接已經(jīng)省略,獲得PreparedStatement的對(duì)象psmt

                 ResultSet rs = psmt.executeQuery();

                while(rs.next()){

                     Timestamp ts = rs.getTimestamp("pdate");

                     SimpleDateFormat sdf = new SimpleDateFormat(format);

                     str = sdf.format(ts);

                    System.out.println(str);

               }

        } catch (SQLException e) {

               e.printStackTrace(); } ......