No 'Access-Control-Allow-Origin' header is present on the requested resource.

分类: 文章 • 2024-04-13 15:49:03

原因：跨域访问，dataType必须是jsonp格式

jsp代码

java代码

String callback = request.getParameter("callback");

PrintWriter out = response.getWriter();

String msg = callback+"({\"message\":\"error\", \"meetingImage\":\"\"})";
out.print(msg );