Write an example JDBC program demonstrating the batch processing with statement object?

Grouping related SQL statements into a batch and executing/submitting them at once is known as batch processing. The Statement interface provides methods to perform batch processing such as addBatch(), executeBatch(), clearBatch().

Follow the steps given below to perform batch updates using the Statement object:

• Register the driver class using the registerDriver() method of the DriverManager class. Pass the driver class name to it, as a parameter.

• Connect to the database using the getConnection() method of the DriverManager class. Passing URL (String), username (String), password (String) as parameters to it.

• Create a Statement object using the createStatement() method of the Connection interface.

• Set the auto-commit to false using setAutoCommit() method of the Connection interface.

• Add the required statements to the batch using the addBatch() method of the Statement interface.

• Execute the batch using the executeBatch() method. of the Statement interface.

• Commit the changes made using the commit() method of the Statement interface.

Example:

Suppose we have created a table named Dispatches with the description

+-------------------+--------------+------+-----+---------+-------+
| Field             | Type         | Null | Key | Default | Extra |
+-------------------+--------------+------+-----+---------+-------+
| Product_Name      | varchar(255) | YES  |     | NULL    |       |
| Name_Of_Customer  | varchar(255) | YES  |     | NULL    |       |
| Month_Of_Dispatch | varchar(255) | YES  |     | NULL    |       |
| Price             | int(11)      | YES  |     | NULL    |       |
| Location          | varchar(255) | YES  |     | NULL    |       |
+-------------------+--------------+------+-----+---------+-------+

Following program inserts data into this table using batch processing (with statement object).

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;
public class BatchProcessing_Statement {
   public static void main(String args[])throws Exception {
      //Getting the connection
      String mysqlUrl = "jdbc:mysql://localhost/sampleDB";
      Connection con = DriverManager.getConnection(mysqlUrl, "root", "password");
      System.out.println("Connection established......");
      //CREATE TABLE Dispatches( Product_Name VARCHAR(255), Name_Of_Customer
      VARCHAR(255), Month_Of_Dispatch VARCHAR(255), Price INT, Location VARCHAR(255));
      //Creating a Statement object
      Statement stmt = con.createStatement();
      //Setting auto-commit false
      con.setAutoCommit(false);

      //Statements to insert records
      String insert1 = "INSERT INTO Dispatches( Product_Name , Name_Of_Customer , "
         + "Month_Of_Dispatch , Price, Location) VALUES "
         + "('KeyBoard', 'Amith', 'January', 1000, 'hyderabad')";
      String insert2 = "INSERT INTO Dispatches( Product_Name , Name_Of_Customer , "
         + "Month_Of_Dispatch , Price, Location) VALUES "
         + "('Earphones', 'SUMITH', 'March', 500, 'Vishakhapatnam')";
      String insert3 = "INSERT INTO Dispatches( Product_Name , Name_Of_Customer , "
         + "Month_Of_Dispatch , Price, Location) VALUES "
         + "('Mouse', 'Sudha', 'September', 200, 'Vijayawada')";
      //Adding the statements to the batch
      stmt.addBatch(insert1);
      stmt.addBatch(insert2);
      stmt.addBatch(insert3);
      //Executing the batch
      stmt.executeBatch();
      //Saving the changes
      con.commit();
      System.out.println("Records inserted......");
   }
}

Output

Connection established......
Records inserted......

If you verify the contents of the Dispatches table you can observe the inserted records.

+--------------+------------------+-------------------+-------+----------------+
| Product_Name | Name_Of_Customer | Month_Of_Dispatch | Price | Location       |
+--------------+------------------+-------------------+-------+----------------+
| KeyBoard     | Amith            | January           | 1000  | hyderabad      |
| Earphones    | SUMITH           | March             | 500   | Vishakhapatnam |
| Mouse        | Sudha            | September         | 200   | Vijayawada     |
+--------------+------------------+-------------------+-------+----------------+