Java?? MySQL ?? ?? ? ?????? ?? ??
Java ???????? MySQL ??????? ?? ??? ?????? ?? ???? ?? ??? ??????. ??? ??? ??? ? ?? ???? ??? ???? ????? ?????. ??.
Java ??
Java?? ??? ????? ??? ?? ??? ??? ??? ???? ????? java.util.Date ???? ???? ?????.
MySQL ??
MySQL?? ? ?? ?? ?? ? ?? ??? ??? ????.
- DATE: ?? ??(?, ?, ?)? ?????.
- TIME: ?? ??(?, ?, ?)? ?????.
- TIMESTAMP: ? ?? ?? ?????. ?? ? ?? ??.
Java? MySQL? ?? ??
MySQL?? TIMESTAMP ?? Java? ???? ??? java.sql? ?????. .Timestamp ??? java.util.Date? ?? ??????. preparedStatement? ???? MySQL? ??? ??? ? setTimestamp() ???? ???? ???? ?? Timestamp ??? ???? ???.
?? ??
????? Java?? MySQL ?? ?? ? ?????? ?? ???? ??? ??? ??????. ??:
import java.sql.*;
public class DatetimeExample {
public static void main(String[] args) throws SQLException {
// Establish a connection to the MySQL database
Connection connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/database_name", "username", "password");
// Get a timestamp object representing the current date and time
Timestamp timestamp = new Timestamp(System.currentTimeMillis());
// Create a prepared statement to insert data into the database
PreparedStatement preparedStatement = connection.prepareStatement("INSERT INTO events (event_date, event_time) VALUES (?, ?)");
// Set the timestamp value as the first parameter
preparedStatement.setTimestamp(1, timestamp);
// Set the second parameter as the time part of the timestamp
preparedStatement.setTime(2, new Time(timestamp.getTime()));
// Execute the insert statement
preparedStatement.executeUpdate();
// Retrieve the inserted data using a result set
ResultSet resultSet = preparedStatement.executeQuery("SELECT event_date, event_time FROM events WHERE event_id = (SELECT LAST_INSERT_ID())");
// Get the timestamp from the result set
Timestamp retrievedTimestamp = resultSet.getTimestamp("event_date");
// Convert the timestamp to a Java date
Date retrievedDate = new Date(retrievedTimestamp.getTime());
// Print the retrieved date and time
System.out.println("Retrieved date: " + retrievedDate);
System.out.println("Retrieved time: " + new Time(retrievedTimestamp.getTime()));
}
}
? ???? Timestamp ??? ???? ??? ?? ??? ?? MySQL ??????? ???? ?? Java? ?? ? ?? ??? ???? ??? ?????.
? ??? Java? MySQL? ?? ??? ?????? ??? ??????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!
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