微信小程序涨粉_zTree树形插件异步加载方法详解

2021-01-12 10:32| 发布者: | 查看: |

zTree树形插件异步加载方法详解       这篇文章主要为大家详细介绍了zTree树形插件异步加载的方法,具有一定的参考价值,感兴趣的小伙伴们可以参考一下

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 

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);

.springframework.beans.factory.annotation.Autowired; .springframework.stereotype.Repository; .jk.dao.ZtreeDao; .jk.model.Ztree; .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());
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凡科。


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