private boolean flag = false;
private String msg = "未开始";
//getter 和 setter 构造之类全有

private List<Result> detail;
private Result success;
public String importOrder() {        
    detail = service.importOrderByOrderIDs(ids, this.getOperatorUserId());
    success = new Result(true,"订单导入 完成!");
        return "success";

<package name="testcard_ajax" extends="json-default" namespace="/testcard_ajax">
        <action name="testcard_*" class="com.aspire.web.testcardinfo.action.TestCardInfoAction"  method="{1}">
        <result name="success" type="json">
                <param name="includeProperties">
                    detail,success
                </param>         
            </result>
        </action>
    </package>

$.ajax({
          type: 'POST',
          url: "/ec_web/testcard_ajax/testcard_importOrder.do",
          data:{"importOrderIdStr":ids.toString(),ajax:true },
          success: function(jsonss){
              var flag = jsonss.success.flag; //断点1
                      var title=jsonss.success.msg;
                      var results = jsonss.detail;
          }
        });

<param name="includeProperties">
                    detail,success
                </param>

------解决方案--------------------
我在项目中是这样配置的：
Java code
<!-- 驗證 角色代碼是否存在  -->
        <action name="validateRoleCode" class="roleAction" method="validateRoleCode">
            <result type="json">
                <param name="includeProperties">status</param>
            </result><!--这里的status只是一个String -->
        </action>
        
        <action name="getUserCodeForRoleCreate" class="roleAction" method="getUserCodeForRoleCreate">
            <result type="json">
                <param name="includeProperties">userList.*</param>
            </result><!--这里的userList装的是一个user对象-->
        </action>

------解决方案--------------------
                <param name="includeProperties">
                   detail,success
               </param>        
  把这个改下。  
 <param name="aa">   detail   </param> 
 <param name="dd">   success</param> 
 在回调函数中直接用jsonss.aa就是detail 。 jsonss.dd就是success ，

------解决方案--------------------
Java code
private List<Result> detail;
private Result success;