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Prepared Statements

After discovering the SQL injection vulnerability, CityBook Libraries needs you to secure the book search feature. You'll switch from simple Statement objects to PreparedStatement to prevent injection attacks.

The HikariSetup class is already configured.

本练习是课程的一部分

Querying a PostgreSQL Database in Java

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练习说明

  • Use a placeholder for the title parameter.
  • Create a PreparedStatement from the connection.
  • Set the title parameter for the prepared statement.

交互式实操练习

通过完成这段示例代码来试试这个练习。

public class Main {
    public static void main(String[] args) throws SQLException {
        HikariDataSource ds = HikariSetup.createDataSource();
        // Set the parameter in the query
        String query = "SELECT * FROM books WHERE title = ____";
        // Create the prepared statement
        try (Connection conn = ds.getConnection();
            PreparedStatement pstmt = ____.____(query)) {
            // Set the title parameter
            pstmt.____(____, "Clean Code");
            try (ResultSet rs = pstmt.executeQuery()) {
                while (rs.next()) {
                    System.out.printf("ID: %d, Title: %s (%d)%n", rs.getInt("book_id"), rs.getString("title"), rs.getInt("publication_year"));
                }
            }
        }
    }
}
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