ajax跨域请求：No 'Access-Control-Allow-Origin' header is present on the requested resource

ajax跨域请求报错解决办法

		<script type="text/javascript">$(document).ready(function () {$.ajax({type : "POST",url : "http://127.0.0.1:9999/app/getToken.ya",success : function(data) {var token = eval(data).rows[0];window.location.href="http://10.6.2.26:8080/BOE/OpenDocument/opendoc/openDocument.jsp?token="+token;}});})</script>

报错：[Web浏览器] "XMLHttpRequest cannot load http://127.0.0.1:9999/app/getToken.ya. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8020' is therefore not allowed access."/HelloHBuilder/index.html (0)原因是ajax跨域请求被服务器端拒绝。只需要在服务器端加入：response.setHeader("Access-Control-Allow-Origin", "*");

即可完美解决，至于安全性问题，后期再说。