XML报文拼接 乱码

以下直接上源码：

/*Element root = doc.getRootElement();
        Element ACCOUNTLISTElement = new Element("ACCOUNTLIST");
        Element ACCOUNTElement = new Element("ACCOUNT");

        String mobile = autoRegistVo.getMOBILE();

        Element ACCOUNTNAMEElement = new Element("ACCOUNTNAME");
        ACCOUNTNAMEElement.addContent(mobile);
        ACCOUNTElement.addContent(ACCOUNTNAMEElement);

        Element ACCOUNTPWDElement = new Element("ACCOUNTPWD");
//        ACCOUNTPWDElement.addContent(" ");
        ACCOUNTElement.addContent(ACCOUNTPWDElement);

        Element ACCOUNTTYPEElement = new Element("ACCOUNTTYPE");
//        ACCOUNTTYPEElement.addContent(" ");
        ACCOUNTElement.addContent(ACCOUNTTYPEElement);

        Element AGENTIDElement = new Element("AGENTID");
        OfficeAccountEntity officeAccount = super.findOfficeAccount(mobile);
        if (officeAccount != null) {
            AGENTIDElement.addContent(officeAccount.getOfficeId());
        }
        ACCOUNTElement.addContent(AGENTIDElement);

        Element ISAUTOREGISTElement = new Element("ISAUTOREGIST");
//        ISAUTOREGISTElement.addContent(" ");
        ACCOUNTElement.addContent(ISAUTOREGISTElement);

        Element FIRSTLOGINTIMEElement = new Element("FIRSTLOGINTIME");
//        FIRSTLOGINTIMEElement.addContent(" ");
        ACCOUNTElement.addContent(FIRSTLOGINTIMEElement);

        Element FIRSTLOGINTYPEElement = new Element("FIRSTLOGINTYPE");
//        FIRSTLOGINTYPEElement.addContent("");
        ACCOUNTElement.addContent(FIRSTLOGINTYPEElement);

        Element ISBINDPOLICYElement = new Element("ISBINDPOLICY");
//        ISBINDPOLICYElement.addContent(" ");
        ACCOUNTElement.addContent(ISBINDPOLICYElement);

        ACCOUNTLISTElement.addContent(ACCOUNTElement);
        root.addContent(ACCOUNTLISTElement);

        String xmlStr = "";
        try {
            org.jdom2.output.Format format = org.jdom2.output.Format.getCompactFormat();
            format.setEncoding("UTF-8");// 设置xml文件的字符为UTF-8，解决中文问题

            XMLOutputter xmlout = new XMLOutputter(format);

            ByteArrayOutputStream bo = new ByteArrayOutputStream();
            xmlout.output(doc, bo);
            xmlStr = new String(bo.getByteArray(),"UTF-8")
　　　　　　　//xmlStr = bo.toString();
        } catch (Exception e) {
            logger.error("补充认证中心xml结果失败");
        }
        return xmlStr;
*/

        //return JsonUtils.transferToJson(convertRegistFileToXml(registAccountExeitModel));