Tag: jdbc

Insert date value in PreparedStatement

A simple table script in Oracle database.

CREATE TABLE DBUSER ( 
  USER_ID       NUMBER (5)    NOT NULL, 
  USERNAME      VARCHAR2 (20)  NOT NULL, 
  CREATED_BY    VARCHAR2 (20)  NOT NULL, 
  CREATED_DATE  DATE          NOT NULL, 
  PRIMARY KEY ( USER_ID ) 
 )

No idea how to insert current date value, e.g. “04/04/2011” into “CREATED_DATE” field, via JDBC PreparedStatement.

String insertTableSQL = "INSERT INTO DBUSER"
		+ "(USER_ID, USERNAME, CREATED_BY, CREATED_DATE) VALUES"
		+ "(?,?,?,?)";
preparedStatement = dbConnection.prepareStatement(insertTableSQL);
preparedStatement.setDate(4, ???);

Solution

The “preparedStatement.setDate()” method is accept a java.sql.Date parameter, so, you have to convert from java.util.Date to java.sql.Date.

For example, create a method to return current date, and convert it java.sql.Date :

private static java.sql.Date getCurrentDate() {
    java.util.Date today = new java.util.Date();
    return new java.sql.Date(today.getTime());
}

And set the returned date via preparedStatement.setDate().

String insertTableSQL = "INSERT INTO DBUSER"
	+ "(USER_ID, USERNAME, CREATED_BY, CREATED_DATE) VALUES"
	+ "(?,?,?,?)";
preparedStatement = dbConnection.prepareStatement(insertTableSQL);
preparedStatement.setDate(4, getCurrentDate());

Done.

 

JDBC PrepareStatement example – Create a table

Here’s an example to show you how to create a table in database via JDBC PrepareStatement. To issue a create statement, calls the PrepareStatement.executeUpdate() method like this :

PreparedStatement preparedStatement = dbConnection.prepareStatement(createTableSQL);
// execute CREATE SQL stetement
preparedStatement.executeUpdate();

Full example…

package br.com.ziben.jdbc;

import java.sql.DriverManager;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;

public class JDBCPreparedStatementCreateExample {

	private static final String DB_DRIVER = "oracle.jdbc.driver.OracleDriver";
	private static final String DB_CONNECTION = "jdbc:oracle:thin:@localhost:1521:ZIBEN";
	private static final String DB_USER = "user";
	private static final String DB_PASSWORD = "password";

	public static void main(String[] argv) {
		try {
			createTable();
		} catch (SQLException e) {
			System.out.println(e.getMessage());
		}
	}
	private static void createTable() throws SQLException {
		Connection dbConnection = null;
		PreparedStatement preparedStatement = null;

		String createTableSQL = "CREATE TABLE DBUSER1("
				+ "USER_ID NUMBER(5) NOT NULL, "
				+ "USERNAME VARCHAR(20) NOT NULL, "
				+ "CREATED_BY VARCHAR(20) NOT NULL, "
				+ "CREATED_DATE DATE NOT NULL, " + "PRIMARY KEY (USER_ID) "
				+ ")";
		try {
			dbConnection = getDBConnection();
			preparedStatement = dbConnection.prepareStatement(createTableSQL);

			System.out.println(createTableSQL);

			// execute create SQL stetement
			preparedStatement.executeUpdate();

			System.out.println("Table \"dbuser\" is created!");

		} catch (SQLException e) {
			System.out.println(e.getMessage());
		} finally {
			if (preparedStatement != null) {
				preparedStatement.close();
			}
			if (dbConnection != null) {
				dbConnection.close();
			}
		}
	}

	private static Connection getDBConnection() {
		Connection dbConnection = null;

		try {
			Class.forName(DB_DRIVER);
		} catch (ClassNotFoundException e) {
			System.out.println(e.getMessage());
		}

		try {
			dbConnection = DriverManager.getConnection(
                            DB_CONNECTION, DB_USER,DB_PASSWORD);
			return dbConnection;
		} catch (SQLException e) {
			System.out.println(e.getMessage());
		}
		return dbConnection;
	}
}

Result

A table named “DBUSER” is created.

CREATE TABLE DBUSER(
   USER_ID NUMBER(5) NOT NULL,
   USERNAME VARCHAR(20) NOT NULL,
   CREATED_BY VARCHAR(20) NOT NULL,
   CREATED_DATE DATE NOT NULL,
   PRIMARY KEY (USER_ID)
)

TABLE "dbuser" IS created!