Question

So far I have been able to insert data into my SQL table only when i declare values inside the executedUpdate statement. What I wanted to know if there is a way that I can pass those values as variables that I will declare as parameters in the executing method like so:

public void updateSQL(String name, String dnsName, String ipV4, String ipV6, int statusCode)
{
    try
    {
        Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
        Connection connection = DriverManager.getConnection("jdbc:sqlserver://servername;database=databasename;integratedSecurity=true");

        System.out.println("Database Name: " + connection.getMetaData().getDatabaseProductName());

        Statement statement = connection.createStatement();

        statement.executeUpdate("INSERT INTO ComputerStatus(Name, DNSName, IPAddressV4, IPAddressV6, StatusCodeID)" + "VALUES(@Name, @DNSName, @IPAddressV4, @IPAddressV6, @StatusCodeID)");
        System.out.println("Data Inserted");

        ResultSet resultSet = statement.executeQuery("SELECT Name FROM ComputerStatus");

        while(resultSet.next())
        {
            System.out.println("Computer Name: " + resultSet.getString("Name"));
        }

        connection.close();
    }
    catch (Exception e)
    {
        e.printStackTrace();
        System.err.println("Problem Connecting!");
    }
}

I’ve tried couple of different things but no luck so far. Anyone know if this can be done?

Answer 1

You may use PreparedStatement instead of Statement.

PreparedStatement stmt = connection.prepareStatement("insert into test (firstname, lastname) values (?, ?");
stmt.setString(1, name);
stmt.setString(2, lname);
stmt.executeUpdate();

Using this way, you prevent SQL injection.