Here’s an example to show you how to select records from table via JDBC PreparedStatement, and display the records via a ResultSet object. To issue a select query, calls the PreparedStatement.executeQuery() method like this :


String selectSQL = "SELECT USER_ID, USERNAME FROM DBUSER WHERE USER_ID = ?";
PreparedStatement preparedStatement = dbConnection.prepareStatement(selectSQL);
preparedStatement.setInt(1, 1001);
ResultSet rs = preparedStatement.executeQuery(selectSQL );
while (rs.next()) {
	String userid = rs.getString("USER_ID");
	String username = rs.getString("USERNAME");	
}

Full example…


package com.mkyong.jdbc;

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

public class JDBCPreparedStatementSelectExample {

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

	public static void main(String[] argv) {

		try {

			selectRecordsFromTable();

		} catch (SQLException e) {

			System.out.println(e.getMessage());

		}

	}

	private static void selectRecordsFromTable() throws SQLException {

		Connection dbConnection = null;
		PreparedStatement preparedStatement = null;

		String selectSQL = "SELECT USER_ID, USERNAME FROM DBUSER WHERE USER_ID = ?";

		try {
			dbConnection = getDBConnection();
			preparedStatement = dbConnection.prepareStatement(selectSQL);
			preparedStatement.setInt(1, 1001);

			// execute select SQL stetement
			ResultSet rs = preparedStatement.executeQuery();

			while (rs.next()) {

				String userid = rs.getString("USER_ID");
				String username = rs.getString("USERNAME");

				System.out.println("userid : " + userid);
				System.out.println("username : " + username);

			}

		} 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

List of the records with “user_id = 1001″ are retrieved from table “DBUSER” and displayed.