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) 2007 by Dr. Herong Yang. 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("1980-02-29");
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:
