json 从前台传到后台，然后再传到前台时读不出中文。

环境：TOMCAT ,spring MVC ,jsp
用EASYUI 传JSON串到后台 
queryData = "queryData=" + generateQueryParameters();
//整理查询参数
        function generateQueryParameters(){
             var jdReceiptQueryStr = "";
             jdReceiptQueryStr = "{";
             jdReceiptQueryStr += "channelId:" + $("#channelId").val() + "," ;
             jdReceiptQueryStr += "channelName:\"" + encodeURIComponent($("#channelName").val()) + "\"," ;
             jdReceiptQueryStr += "terminalIds:\"" + $("#terminalIds").val() + "\"," ;
             jdReceiptQueryStr += "terminalNames:\"" + encodeURIComponent($("#terminalNames").val()) + "\"," ;
             jdReceiptQueryStr += "startDate:\"" + $("#startDate").val() + "\"," ;
             jdReceiptQueryStr += "endDate:\"" + $("#endDate").val() + "\"," ;
             jdReceiptQueryStr += "endDate:\"" + $("#endDate").val() + "\"," ;
             jdReceiptQueryStr += "pssName:\"" + encodeURIComponent($("#pssName").val()) + "\"," ;
             jdReceiptQueryStr += "licensePlate:\"" + encodeURIComponent($("#licensePlate").val()) + "\"," ;
             jdReceiptQueryStr += "businessWorker:\"" + encodeURIComponent($("#businessWorker").val()) + "\"," ;
             jdReceiptQueryStr += "summaryType:\"" + getRaidoValue('summaryType') + "\"," ;
             jdReceiptQueryStr += "receiptType:\"" + $("#receiptType").val() + "\"," ;
             jdReceiptQueryStr += "orderType:\"" + $("#orderType").val() + "\"" ;
             jdReceiptQueryStr += "}";
             return jdReceiptQueryStr; 
        }
后台设个属性queryData接收，然后ModelMap.addAttribute("queryData", queryData);到页面
页面设个文本框（或者隐藏域）接收queryData时，channelName:后面的JSON串都没传过来 求解！！