zTree树形插件异步加载方法详解
程序员文章站
2022-07-05 20:43:09
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
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。