JDBC PreparedStatement example

Here’s an example to show you how to insert few records in batch process, via JDBC PreparedStatement.

dbConnection.setAutoCommit(false);//commit trasaction manually
 
String insertTableSQL = "INSERT INTO DBUSER"
			+ "(USER_ID, USERNAME, CREATED_BY, CREATED_DATE) VALUES"
			+ "(?,?,?,?)";				
PreparedStatement = dbConnection.prepareStatement(insertTableSQL);
 
preparedStatement.setInt(1, 101);
preparedStatement.setString(2, "mkyong101");
preparedStatement.setString(3, "system");
preparedStatement.setTimestamp(4, getCurrentTimeStamp());
preparedStatement.addBatch();
 
preparedStatement.setInt(1, 102);
preparedStatement.setString(2, "mkyong102");
preparedStatement.setString(3, "system");
preparedStatement.setTimestamp(4, getCurrentTimeStamp());
preparedStatement.addBatch();
preparedStatement.executeBatch();
 
dbConnection.commit();

Note
Batch Update is not limit to Insert statement, it’s apply for Update and Delete statement as well.

See full JDBC batch update example …

package com.mkyong.jdbc;
 
import java.sql.DriverManager;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
 
public class JDBCBatchUpdateExample {
 
	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 {
 
			batchInsertRecordsIntoTable();
 
		} catch (SQLException e) {
 
			System.out.println(e.getMessage());
 
		}
 
	}
 
	private static void batchInsertRecordsIntoTable() throws SQLException {
 
		Connection dbConnection = null;
		PreparedStatement preparedStatement = null;
 
		String insertTableSQL = "INSERT INTO DBUSER"
				+ "(USER_ID, USERNAME, CREATED_BY, CREATED_DATE) VALUES"
				+ "(?,?,?,?)";
 
		try {
			dbConnection = getDBConnection();
			preparedStatement = dbConnection.prepareStatement(insertTableSQL);
 
			dbConnection.setAutoCommit(false);
 
			preparedStatement.setInt(1, 101);
			preparedStatement.setString(2, "mkyong101");
			preparedStatement.setString(3, "system");
			preparedStatement.setTimestamp(4, getCurrentTimeStamp());
			preparedStatement.addBatch();
 
			preparedStatement.setInt(1, 102);
			preparedStatement.setString(2, "mkyong102");
			preparedStatement.setString(3, "system");
			preparedStatement.setTimestamp(4, getCurrentTimeStamp());
			preparedStatement.addBatch();
 
			preparedStatement.setInt(1, 103);
			preparedStatement.setString(2, "mkyong103");
			preparedStatement.setString(3, "system");
			preparedStatement.setTimestamp(4, getCurrentTimeStamp());
			preparedStatement.addBatch();
 
			preparedStatement.executeBatch();
 
			dbConnection.commit();
 
			System.out.println("Record is inserted into DBUSER table!");
 
		} catch (SQLException e) {
 
			System.out.println(e.getMessage());
			dbConnection.rollback();
 
		} 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;
 
	}
 
	private static java.sql.Timestamp getCurrentTimeStamp() {
 
		java.util.Date today = new java.util.Date();
		return new java.sql.Timestamp(today.getTime());
 
	}
 
}

Result

3 records are inserted into database via batch update process.

Why need to use Batch Update?

Alternatively, you can use normal executeUpdate() method like this :

String insertTableSQL = "INSERT INTO DBUSER"
				+ "(USER_ID, USERNAME, CREATED_BY, CREATED_DATE) VALUES"
				+ "(?,?,?,?)";				
PreparpreparedStatement = dbConnection.prepareStatement(insertTableSQL);
 
preparedStatement.setInt(1, 111);
preparedStatement.setString(2, "mkyong101");
preparedStatement.setString(3, "system");
preparedStatement.setTimestamp(4, getCurrentTimeStamp());
preparedStatement.executeUpdate(); 
 
preparedStatement.setInt(1, 112);
preparedStatement.setString(2, "mkyong102");
preparedStatement.setString(3, "system");
preparedStatement.setTimestamp(4, getCurrentTimeStamp());
preparedStatement.executeUpdate();

The above code snippet is works as well, but has performance issue if you are try to insert many records, let say 1000 records, because every executeUpdate() will hits database once. For batch update process, it hits database when executeBatch() is called.