ExtJS4+Accordion+SERVLET/STRUTS2+JSON+Ext.tree.Panel实例

package servlet; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import net.sf.json.JSONArray; import net.sf.json.JSONObject; @SuppressWarnings("serial") public class AccordionServlet extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String action = request.getParameter("action"); initHeader(response); if(action.equals("list")){//获取属面板列表 renderText(this.getTreePanelList(), response); }else if(action.equals("node")){ renderText(this.getTreeNodeList(request.getParameter("id")), response); } } public String getTreeNodeList(String id){ JSONArray array = new JSONArray(); for (int j = 0; j < 5; j++) { JSONObject json = new JSONObject(); json.element("id", id + "-" +(j+1)); json.element("text", "树节点-"+ id + "-" +(j+1)); if((j+1) % 2 == 0 && id.length() <= 3){ json.element("leaf", false); }else{ json.element("leaf", true); } array.add(json); } return array.toString(); } public String getTreePanelList(){ JSONArray array = new JSONArray(); for (int i = 0; i < 5; i++) { //生成5个属面板 JSONObject json = new JSONObject(); json.element("id", i+1); json.element("iconCls", "icon-panel"); json.element("title", "Accordion菜单"+(i+1)); array.add(json); } return array.toString(); } public static void renderText(final String content,HttpServletResponse response){ try{ response = initHeader(response); response.getWriter().write(content); response.getWriter().close(); }catch(Exception e){ e.printStackTrace(); } } private static HttpServletResponse initHeader(HttpServletResponse response){ response.setHeader("Pragma", "No-cache"); response.setHeader("Cache-Control", "no-cache"); response.setDateHeader("Expires", 0); response.setCharacterEncoding("UTF-8"); return response; } }