java数据库日期处理用法

java数据库日期处理用法

JDBC日期处理用法详解,可以作为一个连接JDBC的标准类

package  JDBC;

import  java.sql.Connection;
import  java.sql.Date;
import  java.sql.ResultSet;
import  java.sql.SQLException;
import  java.sql.DriverManager;
import  java.sql.Statement;
import  java.sql.Time;
import  java.sql.Timestamp;
import  java.text.SimpleDateFormat;
import  java.util.Calendar;
/** */ /**
 * 
 * @author oakertree
 *
 */
public   class  TestJDBCDate  {
    public static void main(String[] args) {
        Connection con = null;
        Statement stmt = null;
        ResultSet rs = null;
        try {
            Class.forName("com.mysql.jdbc.Driver");
//            new com.mysql.jdbc.Driver();
            con = DriverManager.getConnection("jdbc:mysql://localhost:3307/test", "root", "admini");
            stmt = con.createStatement();
            rs = stmt.executeQuery("SELECT * FROM time");
            while(rs.next()) {
                /**//*
                Date d = rs.getDate("date");
//                SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日");
                System.out.println(sdf.format(d));
                */
                
                /**//*
                Time t = rs.getTime("time");
                SimpleDateFormat sdf = new SimpleDateFormat("HH时mm分ss秒");
                System.out.println(sdf.format(t));
                */
                
                Date d = rs.getDate("datetime");
                Time t = rs.getTime("datetime");
                SimpleDateFormat sdfdate = new SimpleDateFormat("yyyy年MM月dd日");
                SimpleDateFormat sdftime = new SimpleDateFormat("HH时mm分ss秒");
                System.out.println(sdfdate.format(d) + sdftime.format(t));
                
                /**//*
                Timestamp dt = rs.getTimestamp("datetime");
                SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日HH时mm分ss秒");
                System.out.println(sdf.format(dt));
                */
                
                //得到日期中的月
                /**//*
                 Calendar c = Calendar.getInstance();
                c.setTime(d);
                System.out.println(c.get(Calendar.MONTH));
                 */
            }
            } catch (ClassNotFoundException e) {
                e.printStackTrace();
            } catch (SQLException e) {
                e.printStackTrace();
            } finally {
                try {
                    if(rs != null) {
                        rs.close();
                        rs = null;
                    }
                    if(stmt != null) {
                        stmt.close();
                        stmt = null;
                    }
                    if(con != null) {
                        con.close();
                        con = null;
                    }
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }
    }
}
/**/ /*
+----------+----------+------+-----+---------+-------+
| Field    | Type     | Null | Key | Default | Extra |
+----------+----------+------+-----+---------+-------+
| date     | date     | YES  |     | NULL    |       |
| time     | time     | YES  |     | NULL    |       |
| datetime | datetime | YES  |     | NULL    |       |
+----------+----------+------+-----+---------+-------+
 */