zTree树形插件异步加载方法详解

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

 public List getMenusById(Ztree ztree) throws Exception; //接口 

 //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 params = new HashMap(); //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 params=new HashMap(); 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 params=new HashMap(); params.put("id", ztree.getId()); List queryZtree = ztreeDao.queryList(hql, params); if(queryZtree!=null&&queryZtree.size()>0){ flag=true; } return flag; } }