get方式長度有限制，所以只能用post方式

$.ajax({ 
            url:"${_baseUrl}/dd/sendDataToServer", 
            type:'post', //資料傳送方式 
            data:{tableJson:tableJson},
            async: false,
            success: function(response, status, request){
                window.location.href="${_baseUrl}/dd/exportDoc"
 
;
           },
           error:function(XMLHttpRequest, textStatus, errorThrown){
               /* alert(XMLHttpRequest.status);
               alert(XMLHttpRequest.readyState);
               alert(textStatus); */
               layer.msg("系統錯誤", {offset:['85%','45%']});   
           }  
        });
 

通過post將資料傳遞到後臺，快取在session或者servletContext中

@RequestMapping(value = "sendDataToServer",method = RequestMethod.POST,produces = "text/plain; charset=utf-8")
    public void exportDocOfDesignTestTrack1(HttpServletResponse response){
        String tableJson = request.getParameter("tableJson");
        HttpSession session = request.getSession();
        session.setAttribute("tableJson"
 
, tableJson);
    }

然後在ajax的回撥方法中，再去訪問後臺，獲取session中的資料，去做邏輯處理；獲取資料後清理快取

@RequestMapping(value = "exportDoc",method = RequestMethod.GET,produces = "text/plain; charset=utf-8")
public void exportDoc(HttpServletResponse response){
    documentSetionService.setUnlimitedLicense();
    HttpSession session = request.getSession();
    String tableJson = (String) session.getAttribute("tableJson");
    session.removeAttribute("tableJson");
}