Java tool to migrate JSR310 java.time.LocalDate serialized as bytea in PostgreSQL to proper date column

Migration.java

import java.io.ByteArrayInputStream;
import java.io.ObjectInputStream;
import java.sql.*;
import java.time.LocalDate;

public class Migration {
    public static void main(String[] args) throws Exception {
        String url = "jdbc:postgresql://joost.chnet/choice?ssl=true&sslrootcert=wisvch.crt";
        Connection conn = DriverManager.getConnection(url, "user", "password");

        Statement s = conn.createStatement();
        ResultSet rs = s.executeQuery("SELECT id, date FROM exam;");
        PreparedStatement up = conn.prepareStatement("UPDATE exam SET newdate = ? WHERE id = ?");
        while (rs.next()) {
            long id = rs.getLong("id");
            byte[] ser = rs.getBytes("date");
            try (ByteArrayInputStream bin = new ByteArrayInputStream(ser)) {
                try (ObjectInputStream in = new ObjectInputStream(bin)) {
                    LocalDate d = (LocalDate) in.readObject();
                    up.setObject(1, d);
                    up.setLong(2, id);
                    up.executeUpdate();
                }
            }
        }
    }
}