How to send javascript array to struts action using jQuery Ajax

Question

I'm new to Struts 2. I want to send a javascript array to a Struts action class using a jQuery AJAX request.
The warning is working fine, execute()not working.
When I put System.out.println("language : "+ language);in the method execute(), the output

Language: null.

var langArr = [];
    $("#language").each(function()
    {
      var selectedLang = $("select").val();
      var selectedValues = $(this).val();
      langArr.push(selectedValues);
     });
    alert("Languages : " + langArr);

    $.ajax({
        method: "POST",
        url: "getProjectPost",
        data: { "language" : langArr },
        dataType : "json",
        traditional: true,
        success:
            function()
            {
             alert("Success");
            },
        error: 
           function()
            {
             alert("Error");
            }
    });

This is my action class.

public class ProjectPostAction {

    private int[] language;

    public final int[] getLanguage() {
        return language;
    }

    public final void setLanguage(int[] language) {
        this.language = language;
    }

    public String execute() throws Exception {          
           System.out.println("language : "+ language[0]);
           return "success";    
    }

Answer 1

Jquery serializes data sent as parameters, using $.paraminternally when executing an ajax c request $.ajax.

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Answer 2

JSON Struts2, - Struts2 JSON.

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• Json Interceptor , JSON JSP , .