public int QuerybyByIDXpath(String QueryCond, String Xvalue) {
        String XpathStr = "";

        if (QueryCond.equals("QueryByID")) {
            XpathStr = "//EmployeeList/EmployeeInfo[@ID='" + Xvalue + "']";
        }

        if (QueryCond.equals("QueryByName")) {
            XpathStr = "//EmployeeList/EmployeeInfo[@Name='" + Xvalue + "']";
        }
            //下面这句就是 基于xpath 的模糊查询方法。查询所有子节点内容中包含
            //Xvalue 的EmployeeInfo元素
             
             if (QueryCond.equals("QueryByAddr")) {
            XpathStr = "//EmployeeList/EmployeeInfo[contains(Address,'" +
                Xvalue + "')]";
        }

        try {
            XPath servletPath = XPath.newInstance(XpathStr);
            List res = servletPath.selectNodes(doc);
            count = res.size();

            for (int j = 0; j < res.size(); j++) {
                Results.add(new userInfoEntity((Element) res.get(j)));
            }
        } catch (Exception e) {
            System.out.println("Error! " + e.getMessage());
        }

        return count;
    }