XMLHttpRequest cannot load http://localhost/test01/serverjson.php?number=1. No 'Access-Control-Allow-Origin' header is present on the requested resource..
XMLHttpRequest cannot load http://localhost/test01/serverjson.php?number=1. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access. 出現(xiàn)這樣的錯誤，我查了一下是跨域的問題，但還在解決中。具體是什么還沒搞懂，有知道幫忙回我一下，謝謝！
2016-12-25
跨域的話，瀏覽器會先發(fā)一個options請求確定權(quán)限之類的，比如你是localhost：8011 server在localhost：8012
那么你就需要在server端響應(yīng)這個請求，如下：
response.setHeader("Access-Control-Allow-Origin", "host+端口號");
response.setHeader("Access-Control-Allow-Headers", "X-Requested-With");
response.setHeader("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE,OPTIONS");
來告訴瀏覽器他可以那么做，然后瀏覽器再進行g(shù)et/post請求