JDBC Tutorials - Herong's Tutorial Examples - v3.13, by Herong Yang
Handling Date and Timestamp Values
This section describes how to handle Date and Timestamp Values.
When you are dealing with Date or Timestamp values in database, you should use the data type classes provided in the java.sql.* package, not the java.lang.* package. java.sql.* classes are better mapped to database data types. For example, java.sql.Date class is mapped to the database DATE data type better than java.lang.Date class. The toString() method of java.sql.Date class will format a Date object to the format yyyy-mm-dd supported by most database servers.
The following sample Java program shows you how to use java.sql.Date and java.sql.Timestamp classes to handle date and timestamp values in SQL statements and result sets:
/* DerbyInsertDates.java * Copyright (c) HerongYang.com. All Rights Reserved. */ import java.sql.*; public class DerbyInsertDates { public static void main(String [] args) { Connection con = null; try { con = DriverManager.getConnection("jdbc:derby://localhost/TestDB"); Statement sta = con.createStatement(); // Converting Java Date to SQL TIMESTAMP int count = 0; java.sql.Date birthDate = java.sql.Date.valueOf("2010-02-29"); java.sql.Timestamp now = new java.sql.Timestamp( System.currentTimeMillis()); count += sta.executeUpdate( "INSERT INTO Profile" + " (FirstName, LastName, BirthDate, ModTime)" + " VALUES ('Keith', 'Harris', '"+birthDate+"', '"+now+"')"); System.out.println("Number of rows inserted: "+count); // Checking inserted rows ResultSet res = sta.executeQuery( "SELECT * FROM Profile"); System.out.println("List of Profiles: "); while (res.next()) { System.out.println( " "+res.getInt("ID") + ", "+res.getString("FirstName") + ", "+res.getString("LastName") + ", "+res.getFloat("Point") + ", "+res.getDate("BirthDate") + ", "+res.getTimestamp("ModTime")); } res.close(); sta.close(); con.close(); } catch (Exception e) { System.err.println("Exception: "+e.getMessage()); } } }
Noticed that I used res.getTimestamp() instead of res.getDate() to retrieve time and millisecond information:
Number of rows inserted: 1 List of Profiles: 1, Herong, null, 0.0, 1999-12-31, 2016-12-31 23:59:59.999 2, Janet, Gates, 999.99, 2004-10-13, 2016-12-31 23:59:59.999 3, 1403, 896f7, 62.594772, 1999-12-31, 2016-12-31 23:59:59.999 4, 256d, aa3f5, 203.51392, 1999-12-31, 2016-12-31 23:59:59.999 5, d7a, 3a06f, 604.9995, 1999-12-31, 2016-12-31 23:59:59.999 6, 8ef, 466ca, 31.71128, 1999-12-31, 2016-12-31 23:59:59.999 7, 1a34, 59e87, 674.8019, 1999-12-31, 2016-12-31 23:59:59.999 8, 10cc, ab361, 325.30505, 1999-12-31, 2016-12-31 23:59:59.999 9, 11bd, 99552, 315.1111, 1999-12-31, 2016-12-31 23:59:59.999 10, 8c4, 68909, 23.095905, 1999-12-31, 2016-12-31 23:59:59.999 11, 17e1, 99a5d, 186.09494, 1999-12-31, 2016-12-31 23:59:59.999 12, 1ea2, 480c7, 131.6408, 1999-12-31, 2016-12-31 23:59:59.999 13, Keith, Harris, 0.0, 2010-03-01, 2020-02-23 15:12:36.431
Table of Contents
JDBC (Java Database Connectivity) Introduction
Installing and Running Derby (Java DB)
Derby (Java DB) JDBC DataSource Objects
►Derby (Java DB) - DML Statements
Tables with Primary Key Column "GENERATED ... AS IDENTITY"
"INSERT INTO" Statements with INDENTITY Columns
►Handling Date and Timestamp Values
Derby (Java DB) - ResultSet Objects of Queries
Derby (Java DB) - PreparedStatement
Summary of JDBC Drivers and Database Servers