Getting null value in Action from Ajax request in Struts 2

I am trying to send AJAX request to Action in which I am sending one parameter from JSP page. So my Action class is receiving the Ajax request but params which I am sending with AJAX class are null in Action class.

This is My Action Class:

 public class AjaxAction{

String name;
private  String welcomeMessage;

public String execute(){

    System.out.println("AJax called "+name);
    welcomeMessage="Hello"+name;
    return "success";
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public String getWelcomeMessage() {
    return welcomeMessage;
}

public void setWelcomeMessage(String welcomeMessage) {
    this.welcomeMessage = welcomeMessage;
}
 }

This is my struts.xml file:

 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE struts PUBLIC
     "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
     "http://struts.apache.org/dtds/struts-2.0.dtd">
 <struts>

 <constant name="struts.devMode" value="true" />
    <package name="json" namespace="/" extends="json-default">
    <interceptors>
        <interceptor-stack name="defaultStack">
            <interceptor-ref name="json">
                <param name="enableSMD">true</param>
            </interceptor-ref>
        </interceptor-stack>
    </interceptors>
    
            <action name="ajaxAction" class="com.action.AjaxAction">
                <result type="json"/>
            </action>
    </package>

This is my Jsp file:

<title>Struts Ajax Example</title>
<script type="text/javascript">
    function ajaxStruts() {
        data = {
                name:$("#name").val(),
            };

            alert(data);
            $.ajax({
                  type: 'GET',
                  contentType:'application/x-www-form-urlencoded',
                  url:'ajaxAction',
                  data: $("#ajaxform").serialize(),
                  success: function(data){
                    alert(data);
                  }
                
            });
        
    }
</script>

 </head>
 <body>

<fieldset>
    <form method="POST" id="ajaxform">
        Name::<input type="text" id="name" name="name"> 
         <input type="button" name="submit"
            value="submit" onclick="return ajaxStruts();">
    </form>
</fieldset>
<fieldset>
    <div id="ajaxResult"></div>
</fieldset>
 </body>
 </html>

Solution

The problem is with your interceptors in struts.xml.

Either remove them or specify them properly. You have override defaultstack Which is not good practice.

You should make your interceptor-stack's name as custom name different from struts stacks.

For Example, name your stack as mystack.

 <interceptors>
    <interceptor-stack name="mystack">
        <interceptor-ref name="defaultStack"/>
        <interceptor-ref name="json">
            <param name="enableSMD">true</param>
        </interceptor-ref>
    </interceptor-stack>
</interceptors>

This means all the interceptors of defaultstack + json interceptor. This will be packed in interceptor stack named as mystack