The java.time package of Java8 provides a class named LocalDateTime is used to get the current value of local date and time. Using this in addition to date and time values you can also get other date and time fields, such as day-of-year, day-of-week and week-of-year.
Setting the Local time to a column
To set the local date and time value to a column in a table −
- Obtain the LocalDateTime object − You can obtain the LocalDateTime object by invoking the static method now() as −
//Getting the LocalDateTime object LocalDateTime localDateTime = LocalDateTime.now();
- Get the LocalDate and LocalTime objects from the above obtained LocalDateTime as −
LocalDate localDate = localDateTime.toLocalDate(); LocalTime localTime = localDateTime.toLocalTime()
- Now, pass the LocalDate and LocalTime objects to the valueOf() method of the java.sql.Date and java.sql.Time classes respectively as−
java.sql.Date date = java.sql.Date.valueOf(localDate); java.sql.Time time = java.sql.Time.valueOf(localTime);
Example
Let us create a table with name dispatches in MySQL database using CREATE statement as follows −
CREATE TABLE dispatches( ProductName VARCHAR(255), CustomerName VARCHAR(255), DispatchDate date, DeliveryTime time, Price INT, Location VARCHAR(255) );
Now, we will insert 5 records in dispatches table using INSERT statements −
insert into dispatches values('Key-Board', 'Raja', DATE('2019-09-01'), TIME('11:00:00'), 7000, 'Hyderabad');
insert into dispatches values('Earphones', 'Roja', DATE('2019-05-01'), TIME('11:00:00'), 2000, 'Vishakhapatnam');
insert into dispatches values('Mouse', 'Puja', DATE('2019-03-01'), TIME('10:59:59'), 3000, 'Vijayawada');
insert into dispatches values('Mobile', 'Vanaja', DATE('2019-03-01'), TIME('10:10:52'), 9000, 'Chennai');
insert into dispatches values('Headset', 'Jalaja', DATE('2019-04-06'), TIME('11:08:59'), 6000, 'Goa');Following JDBC program inserts a new record into the dispatches table by passing the required values. In here, we are getting the current local date and time values and inserting them as values of the Date and Time columns of the table.
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.time.LocalDateTime;
public class settingLocatDate {
public static void main(String args[]) throws SQLException {
//Registering the Driver
DriverManager.registerDriver(new com.mysql.jdbc.Driver());
//Getting the connection
String mysqlUrl = "jdbc:mysql://localhost/mydatabase";
Connection con = DriverManager.getConnection(mysqlUrl, "root", "password");
System.out.println("Connection established......");
//Getting the LocalDateTime object
LocalDateTime localDateTime = LocalDateTime.now();
System.out.println(localDateTime.toString());
//Converting date and time values from local to SQL
java.sql.Date date = java.sql.Date.valueOf(localDateTime.toLocalDate());
java.sql.Time time = java.sql.Time.valueOf(localDateTime.toLocalTime());
//Creating a Prepared Statement
String query = "INSERT INTO Dispatches VALUES (?, ?, ?, ?, ?, ?)";
PreparedStatement pstmt = con.prepareStatement(query);
pstmt.setString(1, "Watch");
pstmt.setString(2, "Rajan");
pstmt.setDate(3, date);
pstmt.setObject(4, time);
pstmt.setInt(5, 4000);
pstmt.setString(6, "Chennai");
pstmt.execute();
System.out.println("Rows inserted ....");
//Retrieving values
Statement stmt = con.createStatement();
ResultSet rs = stmt.executeQuery("select * from dispatches");
while(rs.next()) {
System.out.println("Product Name: "+rs.getString("ProductName"));
System.out.println("Customer Name: "+rs.getString("CustomerName"));
System.out.println("Date Of Dispatch: "+rs.getDate("DispatchDate"));
System.out.println("Delivery Time: "+rs.getTime("DeliveryTime"));
System.out.println("Location: "+rs.getString("Location"));
System.out.println();
}
}
}Output
Connection established...... 2019-05-14T15:48:42.457 Rows inserted .... Product Name: Key-Board Customer Name: Raja Date Of Dispatch: 2019-09-01 Delivery Time: 11:00:00 Location: Hyderabad Product Name: Earphones Customer Name: Roja Date Of Dispatch: 2019-05-01 Delivery Time: 11:00:00 Location: Vishakhapatnam Product Name: Mouse Customer Name: Puja Date Of Dispatch: 2019-03-01 Delivery Time: 10:59:59 Location: Vijayawada Product Name: Mobile Customer Name: Vanaja Date Of Dispatch: 2019-03-01 Delivery Time: 10:10:52 Location: Chennai Product Name: Headset Customer Name: Jalaja Date Of Dispatch: 2019-04-06 Delivery Time: 11:08:59 Location: Goa Product Name: Watch Customer Name: Rajan Date Of Dispatch: 2019-05-14 Delivery Time: 15:48:42 Location: Chennai