select查询时用了sum函数后，怎么得到结果？

Question

我这是在SSM框架下的网站，在Dao层的mapper里用了这样的查询语句

 <select id="selectData" 
            parameterType="String" 
            resultType="Data">
        select sum(op_numbers),
            sum(pb_numbers),
            sum(pe_numbers)
        from b_data 
        where year = #{year}
        and quarter = #{quarter}
    </select>

resultType="Data"这里的Data是持久化类，在controller里调用查询语句，执行了
上面的查询sql语句成功了，那我要怎么得到查询出来的那3个用sum()求和过的结果啊？

 @RequestMapping(value = "/admin/allData.action")
    public String allData(Model model){
        nursingQualityDataService
                .selectData(year,quarter);
        //这里查询后要怎么获得结果？
        return "admin";

Answer 1

 <select id="selectData" 
            parameterType="String" 
            resultType="Data">
        select sum(op_numbers) as op_numbers,
            sum(pb_numbers) as pb_numbers ,
            sum(pe_numbers) as pe_numbers
        from b_data 
        where year = #{year}
        and quarter = #{quarter}
    </select>

在controller里用Data.getOp_Numbers();这种相应的getter方法就可获取到