HttpServletResponse response = ServletActionContext.getResponse();

        response.setContentType("text/html;charset=utf-8");

        JSONObject json = new JSONObject();

        json.put("filename", filename);

        json.put("dataStr", dataStr);

        try {

            response.getWriter().print(json.toString());

            response.getWriter().close();

        } catch (IOException e) {

            log.fatal(e);

        }

$.ajax({

                    url : "*.action",

                    contentType: "application/json; charset=utf-8",

                    data : "data="data,

                    dataType:"json",

                    async : false,

                    success : function(data) {

                        //var dataJson = data.parseJSON;

                        var dataString = data["dataStr"];

                        var fileName = data["filename"];

                        exportCsv2(dataString, fileName);//导出

                        location.reload();//重新加载页面

                    },

                    error : function(){

                        alert("error");

                    }

                });