jquery ajax send json to action and get response from action

1.<script type="text/javascript" src="../../js/jquery-1.3.2.js"></script>
<script type="text/javascript" src="../../js/jquery.json.js"></script>
<h1>jquery json action</h1>

<script type="text/javascript">
(function(){
    var jsondata = {};
    jsondata['tName'] = 'jacktian';
    jsondata['tPassword'] = 'xyq123';
    var data = {tUser: $.toJSON(jsondata)};
    //alert(data.toString());
    var sUrl = "${pageContext.request.contextPath}/ajax/JsonToActionAndBack_submit.action";
    //var url = '<%=request.getContextPath() %>'+'/ajax/JsonToActionAndBack_submit.action';
    //alert('sUrl:'+sUrl+' url:'+url);
    $.ajax({ url : sUrl, dataType : 'json', type: 'POST', data : data, success : function(json){
            if(json['status'] == 'S'){
              alert('SUCCESS');
            }else{
              alert('SERVER ERROR!');
            }
          },error:function(){
            alert("ERROR");     
          }});     
   
})();
</script>

 

2.struts.xml

<package name="ajax" namespace="/ajax"  extends="struts-default">
      <action name="JsonToActionAndBack_*" class="com.tian.web.action.JsonToActionAndBack" method="{1}">
      <result name="success">/pages/test/showBooks.jsp</result>
    </action>
  </package>

 

3.

package com.tian.web.action;

import java.io.IOException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts2.interceptor.ServletRequestAware;
import org.apache.struts2.interceptor.ServletResponseAware;

import com.opensymphony.xwork2.Action;

public class JsonToActionAndBack implements Action,ServletRequestAware,ServletResponseAware{
   
    class TUser{
        private String tName;
        private String tPassword;
        public String gettName() {
            return tName;
        }
        public void settName(String tName) {
            this.tName = tName;
        }
        public String gettPassword() {
            return tPassword;
        }
        public void settPassword(String tPassword) {
            this.tPassword = tPassword;
        }
    }
   
    private String tUser;
    protected HttpServletRequest request;
    protected HttpServletResponse response;
   
    @Override
    public String execute() throws Exception {
        return null;
    }
   
    public String submit(){
        System.out.println("json to action and back");
        try {
            response.getWriter().println("{/"status/" : /"S/"}");
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    public String gettUser() {
        return tUser;
    }

    public void settUser(String tUser) {
        this.tUser = tUser;
    }

    @Override
    public void setServletRequest(HttpServletRequest arg0) {
        this.request = arg0;
    }

    @Override
    public void setServletResponse(HttpServletResponse arg0) {
        this.response = arg0;
    }
}