var clientTel = $("#clientTel").val();
var activityId = $("#activityId").val();
$.ajax({
type : "post",//發送方式
url : "/arweb/reserve/saveCode.action",// 路徑
data : "clientTel="+clientTel+"&activityId="+activityId ,
success: function(text){$("#randomCode").val(text);},
error: function(text) {alert("對不起,用戶ID不存在,請輸入正確的用戶ID");}
});

HttpServletResponse res = ServletActionContext.getResponse();
res.reset();
res.setContentType("text/html;charset=utf-8");
PrintWriter pw = res.getWriter();
pw.print(random);
pw.flush();
pw.close();