How to get two values using a checkbox in HTML?

I am wondering if it is possible to get two values from a checkbox in HTML form.

My code in HTML is something like this:

<input type="checkbox" name="order" value="20" > Sundae $20
<input type="checkbox" name="order" value="15" > Sandwich $10
<input type="checkbox" name="order" value="25" > Reg. Burger $30

The value set is the price of the orders. So that when I code it in Java servlet, I can total the amount ordered. (my code is something like this)

String [] price = request.getPara开发者_运维知识库meterValues("order");
int sumTotal = 0;
for (String sum : price){
    sumTotal=sumTotal+Integer.parseInt(sum);
}

out.println("<h1>Total Amount Purchased: $" + sumTotal  + "</h1>");

My problems are as follow:

I want to display the name of the order and the price before I total it but I can't because I can only get the price value using this code:

String [] price = request.getParameterValues("order");`

How can I get the name of the item besides the price? I want to call two values in my HTML like this:

<input type="checkbox" name="order" value="20" value="Sundae $20") Sundae $20 

so that in my Servlet the result would be like this:

 Ordered by Customer 1:
      Sundae $20
      Sandwich $10 
      Total: $30 <------//I could only do this

but I think it is not possible and I don't know how to call it in java.

Also, how can I improve my code in getting the total amount?

The "value" should be the name of the option:

<input type="checkbox" name="order" value="sundae" > Sundae $20
<input type="checkbox" name="order" value="sandwich" > Sandwich $10
<input type="checkbox" name="order" value="burger" > Reg. Burger $30

Now you know which items were selected (and not only their price).

It breaks your code for computing the total price. However it was quite broken already. You must not rely on client-provided pride to decide of the total price on the server. The user can very easily send you a form reply with value of "1" and break everything.

The server needs to know the price of each item and use it.

String [] items = request.getParameterValues("order");
int sumTotal = 0;
for (String item : items) {
    sumTotal=sumTotal+prices.getPriceOf(item);
}

where

 prices.getPriceOf(item)

provides the price of the ordered items (in fact the code should be more complicated than that: it should check if the item exist and so on).

You might want to use a textbox instead of a checkbox in order to be able to order more than one item.

One of the quick ways I would solve it would be to use a hidden field

<input type="hidden" id="total">

which would be computed onclick of the Submit button. So, the total.value would eventually look like Sundae,$20;Sandwich,$10...

Since hidden fields are transmitted as part of form submission, you should be able to do

request.getParameterValues("total")

and then unmarshall it in the Java code.

For a more elegant solution, JSON should help.

Use the value of value as a Product Code, for example sundae1==Sundae, burger1==Reg. Burger, burger2==Double Burger. Have an object in your Java such as

class Product {
    String code;
    String name;
    int price; // in pennies - 1000 is $10
}

When you receive the values from the checked boxes you can look up the products using the codes in, say, a Map<String, Product> keyed by product code.

Doing this also avoids the problem you have where I tamper with the values in my web browser and buy everything on the menu for $0.01 each.