What are best practices for working with PreparedStatement?

When working with PreparedStatement in Java, it's important to follow best practices to ensure efficiency, security, and readability. Here are some key best practices:

  • Always use PreparedStatement instead of Statement to avoid SQL injection attacks.
  • Close resources properly using try-with-resources to prevent memory leaks.
  • Use appropriate data types for binding parameters to ensure type safety.
  • Set parameters appropriately before executing the statement to avoid exceptions.
  • Reuse PreparedStatement when executing the same SQL query multiple times for better performance.

Here is a simple example to demonstrate how to use PreparedStatement in Java:

// Sample Java code for PreparedStatement String sql = "INSERT INTO users (username, password) VALUES (?, ?)"; try (Connection connection = DriverManager.getConnection(url, user, password); PreparedStatement preparedStatement = connection.prepareStatement(sql)) { preparedStatement.setString(1, "user123"); preparedStatement.setString(2, "securepassword"); int rowsAffected = preparedStatement.executeUpdate(); System.out.println(rowsAffected + " row(s) inserted."); } catch (SQLException e) { e.printStackTrace(); }

PreparedStatement Java best practices SQL injection prevention resource management performance optimization

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