Return JSON from a JSP
I need using a JSP returns JSON, so wrote the following codes for testing. Fortunately i t works. /* This file name is json.jsp. It posts itself, then get JSON. */ <%response.setHeader("Cache-Control", "no-cache");%> <%response.setHeader("Pragma", "no-cache");%> <% String t = request.getParameter("t"); if(t==null){ %> <!DOCTYPE html> <% response.setHeader("contentType","text/html;charset=UTF-8"); %> <script type="text/javascript"> var XHR; function requestJSON(){ if ( window.XMLHttpRequest ) XHR = new XMLHttpRequest(); else if ( window.ActiveXObject ) { try { XHR = new ActiveXObject('Msxml2.XMLHTTP'); } ...