Sending data from a Javascript variable to Java in JSP

I need help with passing a Javascript value to a Java function in JSP. What is the best way to achieve this? The ID I want to pass comes from a combobox in JSP through Javascript. My goal is to extract the ID from the combobox and then pass it as a parameter to a Java function to receive the Java result.

function Display()
{
   var IdFromCB = (document.getElementById("MListSelect")).value;
   //HOW CAN I CALL THE JAVA FUNCTION HERE USING IdFromCB as a parameter?
   //'<% getSomething(-----IdFromCB-----);%>'

}

Thanks,Mark

javajavascriptajaxjspparameters

Answer №1

To initiate a server call, you must first make a server request.

Javascript operates on the client side, while JSP functions on the server side.

In order to execute a server call, you will need to send a specified string as a query parameter.

There are two methods to accomplish this:

It is important not to confuse that JSP and Javascript can coexist in the same document or file. While they may be present together, JSP is compiled on the server side and Javascript is executed by the browser.

Answer №2

When it comes to Javascript, browsers render the statements which are then executed as client programs.

If you need to execute Java code based on the selection of an HTML component, utilizing an ajax call is necessary.

For a quick example, check out these resources:

AJAX with JSP Example

Fetching Data from Database using AJAX in JSP

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