jQ.ajax({
                type: "POST",
                url: contextPath + "/TPmfbqdWhAct/setSupplementalToContract.nutz",
                data: {"supplementIds": supplementIds,"contractId": '<%= request.getParameter("contractId")%>'},
                success: function () {
                    parent.window.location.reload();
                }
            })

代码中supplementIds是一个字符串数组，contractId是字符串

@At
    @Ok("json")
    public Map<String, Object> setSupplementalToContract(HttpServletRequest request,
                                                         @Param("supplementIds") String[] supplementIds,
                                                         @Param("contractId") String contractId,
                                                         @Attr("userInfo") User user) throws Exception {
        return logic.setSupplementalToContract(request, supplementIds,contractId, user);
    }

supplementIds始终是null