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
练习说明
- Use a placeholder for the title parameter.
- Create a
PreparedStatementfrom the connection. - Set the
titleparameter 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"));
}
}
}
}
}