Js中不能獲取後端通過ModelAndView中的map數據？

public ModelAndView viewAll(@RequestParam(value = "XH") String XH,@RequestParam(value = "co") String co) {

    ModelAndView mv=new ModelAndView();
    mv.addObject("co",co);
    ZHGL_JBXX_XSJBXX jbxx = new ZHGL_JBXX_XSJBXX();
    ZHGL_JBXX_XSLXFSXX lxfs = new ZHGL_JBXX_XSLXFSXX();
    ZHGL_JBXX_XSRXXX xsrx = new ZHGL_JBXX_XSRXXX();
    List<Map> gzjl = new ArrayList<Map>();

    List<Map> jtcy = new ArrayList<Map>();

    List<Map> jyjl = new ArrayList<Map>();

    List<Map> xwzs = new ArrayList<Map>();

    List<Map> xwjl = new ArrayList<Map>();

    List<Map> yynl = new ArrayList<Map>();

    List<Map> shsj = new ArrayList<Map>();

    JSONObject ssxx = new JSONObject();//學生宿舍信息

    JSONObject qt = new JSONObject();//其他信息 現在有班主任和輔導員姓名
    try {

        jbxx = jbxxService.queryJbxx(XH);
        lxfs = jbxxService.queryLxfs(XH);
        System.out.println(XH);
        System.out.println(lxfs.toString());
        xsrx = jbxxService.queryXsrx(XH);

        gzjl = jbxxService.queryGzjl(XH);

        jtcy = jbxxService.queryJtcy(XH);

        jyjl = jbxxService.queryJyjl(XH);

        xwzs = jbxxService.queryXwzs(XH);

        xwjl = jbxxService.queryXwjl(XH);

        yynl = jbxxService.queryYynl(XH);

        shsj = jbxxService.queryShsj(XH);
        ssxx = jbxxService.queryXsSsxx(XH);
        qt = jbxxService.queryXsfdyAndBzr(XH);
        mv.addObject("jbxxJson",JSONObject.fromObject(jbxx));//將map轉化爲json
        mv.addObject("xsrxJson",JSONObject.fromObject(xsrx));

        JSONObject xh=new JSONObject();
        xh.put("XH", XH);
        mv.addObject("XH",xh.toString());//
    } catch (Exception e) {
        e.printStackTrace();
    }
    mv.addObject("jbxx",jbxx);//基本信息
    mv.addObject("lxfs",lxfs);//聯繫方式
    mv.addObject("xsrx",xsrx);//入學信息
    mv.addObject("gzjl",gzjl);//工作經歷
    mv.addObject("jtcy",jtcy);//家庭成員
    mv.addObject("jyjl",jyjl);//教育經歷
    mv.addObject("xwzs",xwzs);//校外證書
    mv.addObject("xwjl",xwjl);//校外經歷
    mv.addObject("yynl",yynl);//語言能力
    mv.addObject("shsj",shsj);//社會實踐
    mv.addObject("ssxx",ssxx);//宿舍信息
    mv.addObject("qt",qt);//輔導員班主任
    mv.addObject("selectParams", getSurestream().getString("selectParams") );
    System.out.println(getSurestream().getString("selectParams"));
    mv.setViewName("xsxx/jbxx/jbxxShowPage");

    return mv;

}

jsp中可以通過var XH = ${jbxx.XH}來獲得，但js中就顯示未定義，可以現將jbxx這個map在後端先轉化成JSON，然後在後端獲取