How can I run JavaScript code at server side Java code?

Question

I want to run JavaScript code at the server side. I want to manipulate result returned by JavaScript inside my Java code. How can it be done?

Answer 1

The start is clearly to look into rhino.

I think you will find this 3 links very useful

1. JavaScript EE, Part 1: Run JavaScript files on the server side
2. JavaScript EE, Part 2: Call remote JavaScript functions with Ajax
3. JavaScript EE, Part 3: Use Java scripting API with JSP

You can also have a look to helma

Helma is a server-side Javascript environment and web application framework for fast and efficient scripting and serving of your websites and Internet applications.

Helma is written in Java and employs Javascript for its server-side scripting environment ...

Answer 2

You can use RHINO or NASHORN.

public class RhinoApp {
private String simpleAdd = "var z=9; z*=9";

public void runJavaScript() {
    Context jsCx = Context.enter();
    Context.getCurrentContext().setOptimizationLevel(-1);
    ScriptableObject scope = jsCx.initStandardObjects();
    Object result = jsCx.evaluateString(scope, simpleAdd , "formula", 0, null);
    Context.exit();
    System.out.println(result);
}