zTree树形插件异步加载方法详解

时间:2021-05-25

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

<!DOCTYPE html><html><head><meta charset="UTF-8"><title>异步加载</title><link rel="stylesheet" href="${pageContext.request.contextPath}/zTree_v3-master/css/demo.css"><link rel="stylesheet" href="${pageContext.request.contextPath}/zTree_v3-master/css/zTreeStyle/zTreeStyle.css"><script type="text/javascript" src="${pageContext.request.contextPath}/jquery-2.1.1.min.js"></script><script type="text/javascript" src="${pageContext.request.contextPath}/zTree_v3-master/js/jquery.ztree.core.min.js"></script><script type="text/javascript"> var setting = { async : { enable : true, url : "${pageContext.request.contextPath}/ztreeAction!getMenusById.jhtml", autoParam : [ "id" ], //dataFilter : filter }, data : { key : { url : "xUrl" }, simpleData : { enable : true, pIdKey : "pid" } }, }; $(document).ready(function() { $.fn.zTree.init($("#treeDemo"), setting); });</script></head><body> <div class="ztree" style="width: 20%; height: 500px; padding-top: 10px; float: left; border: 1px solid #FF0000;"> <ul id="treeDemo"></ul> </div></body></html>

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

public void getMenusById(){ List<Ztree> list=null; try { list=ztreeService.getMenusById(ztree); } catch (Exception e) { e.printStackTrace(); } super.writeJson(list);}public List<Ztree> 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<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<Ztree> 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<Ztree> queryZtree = ztreeDao.queryList(hql, params); List<Ztree> list=new ArrayList<Ztree>(); 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=new HashMap<String,Object>(); params.put("id", ztree.getId()); List<Ztree> queryZtree = ztreeDao.queryList(hql, params); if(queryZtree!=null&&queryZtree.size()>0){ flag=true; } return flag; } }

dao层就不用写了吧,只是一个查询,下面我把ztree的表字段附上

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。

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