zTree树形插件异步加载方法详解

本文实例为大家分享了zTree树形插件异步加载，Struts2框架，供大家参考，具体内容如下

异步加载

上面呢，是jsp页面的代码，因为是纯插件测试，可以直接复制过去使用的，

action层代码，可以直接复制使用

list=null; try { list=ztreeService.getMenusById(ztree); } catch (Exception e) { e.printStackTrace(); } super.writeJson(list); }

getMenusById(Ztree ztree) throws Exception; //接口

<div class="jb51code">
<pre class="brush:java;">
//service代码，几本都可以复制使用

package com.jk.service.impl;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;

import com.jk.dao.ZtreeDao;
import com.jk.model.Ztree;
import com.jk.service.ZtreeService;
@Repository("ztreeService")
public class ZtreeServiceImpl implements ZtreeService {

@Autowired
private ZtreeDao ztreeDao;

@Override
public List queryList(Ztree ztree) throws Exception {
String hql=" from Ztree where 1=1 ";
Map<String,Object> params = new HashMap<String,Object>();
//传的对象是否为空，拼接sql+id
if(ztree.getId()!=null){
hql+=" and id = :id ";
params.put("id",ztree.getId());
}

return ztreeDao.queryList(hql,params);

}
//递归查询
@Override
public List getMenusById(Ztree ztree) throws Exception {
String hql=" from Ztree where 1=1 ";
Map<String,Object> params=new HashMap<String,Object>();
if(ztree.getId()==null||ztree.getId().equals("")){
hql+=" and pid is null ";
}else{
hql+= " and pid = :id ";
params.put("id",ztree.getId());
}
List queryZtree = ztreeDao.queryList(hql,params);
List list=new ArrayList();
for(Ztree ztree2:queryZtree){
if(queryBoolean(ztree2)){
ztree2.setIsParent("true");
}
list.add(ztree2);
}
return list;
}
//熟悉递归的朋友应该可以看懂，我就不解释了，我也聊不清楚这个递归，不误导了，代码在这，可以复制进去直接运行，
public boolean queryBoolean(Ztree ztree) throws Exception{
boolean flag=false;
String hql= " from Ztree where pid = :id ";

Map<String,Object>();
params.put("id",ztree.getId());
List<Ztree> queryZtree = ztreeDao.queryList(hql,params);
if(queryZtree!=null&&queryZtree.size()>0){
  flag=true;
}
return flag;

}

}