Vue axios asynchronous obtain background information alert prompts undefined

Record a small problem, paging query on course

Reception obtain background data alert pop-up prompts undefined data through asynchronous request axios

Here are three bean

PageResult 

/ ** 
* Package Object tab results
  * / 
public  class PageResult the implements the Serializable {
     // total number of records 
    Private Long Total;
     // this page results 
    Private List rows; 

    // GET, SET method omits 
　　....
 
}

QueryPageBean 

/**
 * Packaging query
 * / 
Public  class QueryPageBean the implements Serializable {
     // Page 
    Private Integer currentPage;
     // records per page 
    Private Integer pageSize;
     // query 
    Private String queryString;

    // GET, SET method omits 
　　　....      
}

Result 

/**
 * Packaging return result
 * / 
Public  class the Result the implements Serializable {
     // execution result, true for the successful implementation of false failure to implement the 
    Private  boolean Flag;
     // returns the result information, mainly for the page message 
    Private String the Message;
     // return data 
    Private Object the Data; 

    / / GET, SET method omits 
　　....
 
}

Controller layer

    // returns to the foreground is a Result object 
　　 @RequestMapping ( "/ findSetmeal" )
     public Result findSetmeal (@RequestBody QueryPageBean queryPageBean) {
         the try {
　　　　　　　// -Service layer returns the object is a PageResult 
            PageResult Page = setmealService.findPage (queryPageBean);
             return  new new the Result ( to true , MessageConstant.QUERY_SETMEALLIST_SUCCESS, Page);
        } catch (Exception e) {
            return new Result(false, MessageConstant.QUERY_SETMEALLIST_FAIL);
        }
    }

Reception, obtaining background data alert prompts undefined, Code Red is an example of an error , due to the return of the object is a Result, Result has been packaged for PageResult

            // paging query 
            FindPage () {
                 // set parameters 
                var param = {
                    currentPage: this.pagination.currentPage,
                    pageSize: this.pagination.pageSize,
                    queryString: this.pagination.queryString,
                };
                axios.post("/setMeal/findPage.do", param).then((response) => {
                    // alert(response.data.flag);
                    // alert(response.data.total);
                    // alert(response.data.rows);
                    this.dataList = response.data.rows;
                    this.pagination.total = response.data.total;
                    this.dataList = response.data.data.rows;
                    this.pagination.total = response.data.data.total;
                })
            },