字符串拼接成josn 传到前台

@RequestMapping("/Middlewareselect")
@ResponseBody
public void Middlewareselect(HttpServletResponse response) throws IOException {
        response.setHeader("Access-Control-Allow-Origin", "*");
        response.setContentType("text/html;charset=utf-8");
        ModelMap mapQQ = new ModelMap();
        JSONObject jsonObject = new JSONObject();
        List<Company> Companyselect = middlewareMapper.Middlewareselect();
        List <Object> AA=new ArrayList<Object>();
        for (Company company:Companyselect){    
            ModelMap map = new ModelMap();
            ResultVo resultVo = new ResultVo();
            List<middleware> middlewareList = middlewareMapper.quyuselect(company.getC_id());
            resultVo.setC_id(company.getC_id());
            resultVo.setC_name(company.getC_name());
            resultVo.setC_phone(company.getC_phone());
            resultVo.setM_id(middlewareList.get(0).getM_id());
            resultVo.setRegionList(middlewareList);
            map.put("aaa", AA);
            AA.add(resultVo);
        }
        JSONArray array = JSONArray.fromObject(AA);
        response.getWriter().print(array);
}

public List<Company>  Middlewareselect();

<select id="Middlewareselect" resultType="bean.Company">
  SELECT DISTINCT c.c_id ,c_name,c.c_phone from company c,middleware m where c.c_id=m.c_id
</select>