如何使用 jQuery Ajax 将 javascript 数组发送到 struts 动作

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

语言: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");
            }
    });

这是我的动作课

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";    
    }

推荐答案

Jquery 使用 $.param 在内部使用 $.ajax.