What is PreparedStatement in Java?

A PreparedStatement in Java is a feature of JDBC (Java Database Connectivity) that allows you to execute parameterized SQL queries. It is an interface that provides methods to execute SQL statements, retrieve results and handle parameters, making it more efficient and secure against SQL injection attacks. PreparedStatement is precompiled, which means it can be executed multiple times without the need for recompilation, improving performance for repeated execution.

Using a PreparedStatement can significantly reduce the risk of SQL injection attacks, as it automatically escapes special characters in the parameters, ensuring that user input is safe. This makes it a preferred choice when dealing with dynamic SQL queries involving user inputs.

Here's an example of how to use PreparedStatement in Java:


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

    public class PreparedStatementExample {
        public static void main(String[] args) {
            String url = "jdbc:mysql://localhost:3306/mydatabase";
            String user = "username";
            String password = "password";

            String sql = "INSERT INTO users (name, email) VALUES (?, ?)";

            try (Connection conn = DriverManager.getConnection(url, user, password);
                 PreparedStatement pstmt = conn.prepareStatement(sql)) {
                
                pstmt.setString(1, "John Doe");
                pstmt.setString(2, "john.doe@example.com");

                pstmt.executeUpdate();
                System.out.println("User added successfully!");
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }

What is PreparedStatement in Java?

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What is PreparedStatement in Java?

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