easyui下拉框動態(tài)級聯(lián)加載的示例代碼

<span>學(xué)院名稱：</span> 
<input class="easyui-combobox"  id="collegeName"> 
<span>課程名稱：</span> 
<input class="easyui-combobox"  id="courseName"><br/> 

$(function() {    
   // 下拉框選擇控件，下拉框的內(nèi)容是動態(tài)查詢數(shù)據(jù)庫信息 
   $('#collegeName').combobox({  
       url:'${pageContext.request.contextPath}/loadInstitution',  
       editable:false, //不可編輯狀態(tài) 
       cache: false, 
       panelHeight: '150', 
       valueField:'id',   
       textField:'institutionName', 
        
    onHidePanel: function(){ 
      $("#courseName").combobox("setValue",'');//清空課程 
      var id = $('#collegeName').combobox('getValue');     
      //alert(id); 
       
     $.ajax({ 
      type: "POST", 
      url: '${pageContext.request.contextPath}/loadCourse?id=' + id, 
      cache: false, 
      dataType : "json", 
      success: function(data){ 
      $("#courseName").combobox("loadData",data); 
           } 
        });    
       } 
});   
    
   $('#courseName').combobox({  
     //url:'itemManage!categorytbl',  
     editable:false, //不可編輯狀態(tài) 
     cache: false, 
     panelHeight: '150',//自動高度適合 
     valueField:'id',   
     textField:'courseName' 
     }); 
    
}); 

@RequestMapping("/loadInstitution") 
  /** 
   * 加載學(xué)院 
   * @param  
   * @param  
   * @return void 
   * @exception/throws [違例類型] [違例說明] 
   * @see     [類、類#方法、類#成員] 
   * @deprecated 
   */ 
  public void loadInstitute(HttpServletRequest request, 
      HttpServletResponse response) throws Exception { 
    try { 
      JackJsonUtils JackJsonUtils = new JackJsonUtils(); 
      List<Institution> institutionList = institutionBean 
          .queryAllColleage(); 
      System.out.println("學(xué)院list大小=====" + institutionList.size()); 
      String result = JackJsonUtils.BeanToJson(institutionList); 
      System.out.println(result); 
      JsonUtils.outJson(response, result); 
    } catch (Exception e) { 
      logger.error("加載學(xué)院失敗", e); 
    } 
  } 
 
  @RequestMapping("/loadCourse") 
  /** 
   * 動態(tài)加載課程 
   * 
   * 
   * @param  
   * @param  
   * @return void 
   * @exception/throws [違例類型] [違例說明] 
   * @see     [類、類#方法、類#成員] 
   * @deprecated 
   */ 
  public void loadCourse(HttpServletRequest request, 
      HttpServletResponse response) throws Exception { 
    JackJsonUtils JackJsonUtils = new JackJsonUtils(); 
    String id = request.getParameter("id"); 
    System.out.println("學(xué)院id====" + id); 
    try { 
      if(id != null && id != ""){ 
        List<CourseInfo> listCourseInfoList = courseBean 
            .queryAllCourseInfos(id); 
        System.out.println("課程list大小=====" + listCourseInfoList.size()); 
        String result = JackJsonUtils.BeanToJson(listCourseInfoList); 
        System.out.println(result); 
        JsonUtils.outJson(response, result); 
      } 
    } catch (Exception e) { 
      logger.error("加載課程失敗", e); 
    } 
  }