Jquery EasyUI 异步树

Jquery EasyUI 异步树

前台JSP 没什么难的 调用onBeforeExpand 点击节点触发下一节点

<ul id="tt"  data-options="animate:true,lines:false" ></ul>

$('#tt').tree({

 checkbox: false,

 url: contextRoot + 'wf/WfDesignAction!TreeList.action?currentId=-1',//调用action返回json数据

 onBeforeExpand:function(node,param){

  if(node){

    $('#tt').tree('options').url = contextRoot + 'wf/WfDesignAction!TreeList.action?currentId='+ node.id;

  }

 },

 onClick:function(node){             

     alert(node.id);

 }

});

后台action 

public String TreeList() throws IOException{

try{

String sessionId = this.getSessionID();

String method = "wf.getChildNodes";

Map<String, Object> map = new HashMap<String, Object>();

map.put("Id", currentId);

String paramValue = this.Object2JSon(map);

String result = wfDesignService.TreeList(sessionId, method, paramValue);

List<Object> List = JsonProcessUtil.rowsJsonToBean(result,TreeNodeEntity.class);

List<TreeNodeEntity> searchList = new ArrayList<TreeNodeEntity>();

//以下才是重点 前面是我的项目调用的一些方法而已 重点是通过后台返回的list 把得到的list进行字符串拼接成EasyUi能够识别的json格式

for( Object item : List ) {

searchList.add((TreeNodeEntity)item);

}

String str = "[";

if(searchList!=null&&searchList.size()>0){

for(TreeNodeEntity treeNodeEntity:searchList){

str +="{";

  str+="\"id\":\""+treeNodeEntity.getId()+"\",\"text\":\""+treeNodeEntity.getText()+"\",\"state\":\"closed\" },";  

}

str=str.substring(0, str.length()-1);

str=str+"]";

System.out.println(str);

}else{

str="[]";

}

this.setJson(str);

}catch(Exception e){

e.printStackTrace();

}

return Const.ACTION_JSON;

}