Java jdbc batch update examples


In Java, you can use JDBC batch updates to execute multiple SQL statements as a single batch. This can be much faster than executing each statement individually.

Here are the steps to use JDBC batch updates in your Java code:

  1. Import the necessary JDBC classes in your Java code:
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
  1. Create a connection to your database using the DriverManager class:
String url = "jdbc:mysql://localhost/mydatabase";
String user = "myuser";
String password = "mypassword";
Connection connection = DriverManager.getConnection(url, user, password);

Replace "jdbc:mysql://localhost/mydatabase" with the URL to your database, and "myuser" and "mypassword" with your database credentials.

  1. Set the auto-commit mode of the connection to false:

This tells the connection that it should not commit each statement individually, but instead wait for an explicit call to the commit() method.

  1. Create a new PreparedStatement object to execute your SQL queries:
String sql = "INSERT INTO mytable (name, age) VALUES (?, ?)";
PreparedStatement statement = connection.prepareStatement(sql);

Replace "mytable" with the name of your table.

  1. Add the parameters for your SQL queries using the set methods:
statement.setString(1, "Alice");
statement.setInt(2, 25);

statement.setString(1, "Bob");
statement.setInt(2, 30);

The addBatch() method adds the current set of parameters to the batch.

  1. Execute the batch update:
int[] updateCounts = statement.executeBatch();

The executeBatch() method executes the batch and returns an array of update counts for each SQL statement in the batch.

  1. Call the commit() method to commit the transaction:

If an exception is thrown, the rollback() method is called to undo any changes made in the batch.

  1. Close the PreparedStatement and Connection objects:

This frees up any resources used by the objects.

That's it! With these steps, you can use JDBC batch updates in your Java code to execute multiple SQL statements as a single batch.