ajax异步读取后台传递回的下拉选项的值方法

  请选择展会：  选择展会 *

 package oa.sys016.oagzxxgl.action; import java.io.PrintWriter; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import net.sf.json.JSONArray; import org.apache.struts.action.Action; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionForward; import org.apache.struts.action.ActionMapping; import cn.com.chx.bo.AppBo; /** * 通过ajax加载届次选择下拉列表的选择项 * @author liu * */ public class DictsAction extends Action{ private AppBo appBo = null; @Override public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception { // 设置编码 response.setContentType("application/json;charset=UTF-8"); response.setCharacterEncoding("UTF-8"); PrintWriter out = response.getWriter(); appBo = new AppBo(); try { // 获取ActionType String actionType = request.getParameter("actionType"); if (actionType != null && actionType.equals("jieci")) { // 查询届次 String jieciJson = getJieciJson(); out.print(jieciJson); } } catch (Exception e) { e.printStackTrace(); } finally { out.close(); } return null; } private String getJieciJson() { // 查询届次 List jieciList; try { jieciList = appBo.query("SELECT ID AS CODE,ZH_NAME AS NAME FROM ZH_GZ_INFOX"); List> lists = new ArrayList>(); if (jieciList.size() > 0) { for (int i = 0; i  maps = new HashMap(); maps.put("code", (String) ((HashMap) jieciList.get(i)).get("CODE")); maps.put("name", (String) ((HashMap) jieciList.get(i)).get("NAME")); lists.add(maps); } } // [{"id":"1","name":"CIMT2015"},{"id":"2","name":"CCMT2016"}] JSONArray json = JSONArray.fromObject(lists); return json.toString(); } catch (Exception e) { e.printStackTrace(); } return null; } }