action 返回 json 資料

/**<br /> * 建立AJAX應答資料(JSON資料格式)<br /> *<br /> * @param response<br /> * 輸出<br /> * @param obj<br /> * 要封裝的對象<br /> * @return null<br /> * @throws IOException<br /> */<br /> private static ActionForward buildJSONDate(final HttpServletResponse response, final Object obj) throws IOException<br /> {<br /> //設定編碼<br /> response.setContentType("application/json;charset=UTF-8");<br /> response.setCharacterEncoding("UTF-8"); </p><p> // 設定瀏覽器不要緩衝<br /> response.setHeader("Pragma", "No-cache");<br /> response.setHeader("Cache-Control", "no-cache");<br /> response.setDateHeader("Expires", 0); </p><p> final PrintWriter out = response.getWriter(); </p><p> JsonUtil.toJson(out, obj); //把JSON資料結構寫到輸出資料流中 </p><p> out.flush(); </p><p> return null;<br /> }<br />