struts2 ajax的一种实现方式
/** * ajax请求,通过省份id获取学习中心 */ public void getSitesByPid() { HttpServletResponse response = ServletActionContext.getResponse(); PrintWriter out = null; try { out = response.getWriter(); List<PeSite> sites = presignService.getPeSites(pid); JSONArray json = JSONArray.fromObject(sites); out.print(json); } catch (IOException e) { e.printStackTrace(); } finally { out.flush(); out.close(); } }