Store CLOB data into database in Java

/* ww  w .ja v  a 2 s .  c  o  m*/
import java.io.File;
import java.io.FileReader;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;

public class Main {
  private static String url = "jdbc:oracle:thin:@localhost:1521:xe";

  private static String username = "yourDatabase";

  private static String password = "welcome";

  public static void main(String[] args) throws Exception {

    Class.forName("oracle.jdbc.driver.OracleDriver");
    Connection conn = DriverManager.getConnection(url, username, password);
    conn.setAutoCommit(false);

    String sql = "INSERT INTO documents (name, description, data) VALUES (?, ?, ?)";
    PreparedStatement stmt = conn.prepareStatement(sql);
    stmt.setString(1, "a.txt");
    stmt.setString(2, "b");

    File data = new File("C:\\a.txt");
    FileReader reader = new FileReader(data);
    stmt.setCharacterStream(3, reader, (int) data.length());
    stmt.execute();

    conn.commit();
    reader.close();
    conn.close();

  }
}