标题:管理Layui树形图,提高页面交互性与可视化效果
- Layui树形图简介
- 一、引入Layui和jQuery库:
- 二、HTML结构准备:
- 三、初始化树形图:
- 四、配置树形图的其他属性和事件:
- 4.1 实体类
- 4.2 PermissionDao方法
- 4.3 PermissionAction类的方法实现
- 4.4 mvc的配置使用
- 4.5 运行结果
- 五、异步加载节点数据:
- 六、拓展功能和样式:
- 结语:
Layui树形图简介
Layui树形图是一个强大的前端组件,可以在网页中展示和操作树形结构的数据。本文将介绍如何使用Layui树形图管理数据,以提升页面交互性和可视化效果。
正文:
一、引入Layui和jQuery库:
首先,确保你已经正确引入了Layui和jQuery库。在HTML文件中的head标签中添加以下代码:
<link rel="stylesheet" href="${pageContext.request.contextPath }/static/js/layui/css/layui.css"><script src="${pageContext.request.contextPath }/static/js/layui/layui.js"></script>
二、HTML结构准备:
接下来,我们需要准备好HTML的结构,用来容纳和展示Layui树形图。可以在body中创建一个div容器作为树形图的父容器,给它一个id,比如:
<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC >
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head><%@ include file = "common/header.jsp" %>
<body>
<div class="layui-layout layui-layout-admin"><div class="layui-header"><div class="layui-logo layui-hide-xs layui-bg-black">layout demo</div><!-- 头部区域(可配合layui 已有的水平导航) --><ul class="layui-nav layui-layout-left"><!-- 移动端显示 --><li class="layui-nav-item layui-show-xs-inline-block layui-hide-sm" lay-header-event="menuLeft"><i class="layui-icon layui-icon-spread-left"></i></li><!-- Top导航栏 --><li class="layui-nav-item layui-hide-xs"><a href="">nav 1</a></li><li class="layui-nav-item layui-hide-xs"><a href="">nav 2</a></li><li class="layui-nav-item layui-hide-xs"><a href="">nav 3</a></li><li class="layui-nav-item"><a href="javascript:;">nav groups</a><dl class="layui-nav-child"><dd><a href="">menu 11</a></dd><dd><a href="">menu 22</a></dd><dd><a href="">menu 33</a></dd></dl></li></ul><!-- 个人头像及账号操作 --><ul class="layui-nav layui-layout-right"><li class="layui-nav-item layui-hide layui-show-md-inline-block"><a href="javascript:;"><img src="//tva1.sinaimg.cn/crop.0.0.118.118.180/5db11ff4gw1e77d3nqrv8j203b03cweg.jpg" class="layui-nav-img">tester</a><dl class="layui-nav-child"><dd><a href="">Your Profile</a></dd><dd><a href="">Settings</a></dd><dd><a href="login.jsp">Sign out</a></dd></dl></li><li class="layui-nav-item" lay-header-event="menuRight" lay-unselect><a href="javascript:;"><i class="layui-icon layui-icon-more-vertical"></i></a></li></ul></div><div class="layui-side layui-bg-black"><div class="layui-side-scroll"><!-- 左侧导航区域(可配合layui已有的垂直导航) --><ul id="menu" class="layui-nav layui-nav-tree" lay-filter="menu"><li class="layui-nav-item layui-nav-itemed"><a class="" href="javascript:;">menu group 1</a><dl class="layui-nav-child"><dd><a href="javascript:;">menu 1</a></dd><dd><a href="javascript:;">menu 2</a></dd><dd><a href="javascript:;">menu 3</a></dd><dd><a href="">the links</a></dd></dl></li></ul></div></div><div class="layui-body"><!-- 内容主体区域 --><div style="padding: 15px;">内容主体区域。记得修改 layui.css 和 js 的路径</div></div><div class="layui-footer"><!-- 底部固定区域 -->底部固定区域</div>
</div></body>
</html>
三、初始化树形图:
在页面加载完成后,需要进行树形图的初始化工作。在JavaScript中添加以下代码:
<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC >
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head><%@ include file = "common/header.jsp" %>
<body>
<div class="layui-layout layui-layout-admin"><div class="layui-header"><div class="layui-logo layui-hide-xs layui-bg-black">layout demo</div><!-- 头部区域(可配合layui 已有的水平导航) --><ul class="layui-nav layui-layout-left"><!-- 移动端显示 --><li class="layui-nav-item layui-show-xs-inline-block layui-hide-sm" lay-header-event="menuLeft"><i class="layui-icon layui-icon-spread-left"></i></li><!-- Top导航栏 --><li class="layui-nav-item layui-hide-xs"><a href="">nav 1</a></li><li class="layui-nav-item layui-hide-xs"><a href="">nav 2</a></li><li class="layui-nav-item layui-hide-xs"><a href="">nav 3</a></li><li class="layui-nav-item"><a href="javascript:;">nav groups</a><dl class="layui-nav-child"><dd><a href="">menu 11</a></dd><dd><a href="">menu 22</a></dd><dd><a href="">menu 33</a></dd></dl></li></ul><!-- 个人头像及账号操作 --><ul class="layui-nav layui-layout-right"><li class="layui-nav-item layui-hide layui-show-md-inline-block"><a href="javascript:;"><img src="//tva1.sinaimg.cn/crop.0.0.118.118.180/5db11ff4gw1e77d3nqrv8j203b03cweg.jpg" class="layui-nav-img">tester</a><dl class="layui-nav-child"><dd><a href="">Your Profile</a></dd><dd><a href="">Settings</a></dd><dd><a href="login.jsp">Sign out</a></dd></dl></li><li class="layui-nav-item" lay-header-event="menuRight" lay-unselect><a href="javascript:;"><i class="layui-icon layui-icon-more-vertical"></i></a></li></ul></div><div class="layui-side layui-bg-black"><div class="layui-side-scroll"><!-- 左侧导航区域(可配合layui已有的垂直导航) --><ul id="menu" class="layui-nav layui-nav-tree" lay-filter="menu"><li class="layui-nav-item layui-nav-itemed"><a class="" href="javascript:;">menu group 1</a><dl class="layui-nav-child"><dd><a href="javascript:;">menu 1</a></dd><dd><a href="javascript:;">menu 2</a></dd><dd><a href="javascript:;">menu 3</a></dd><dd><a href="">the links</a></dd></dl></li></ul></div></div><div class="layui-body"><!-- 内容主体区域 --><div style="padding: 15px;">内容主体区域。记得修改 layui.css 和 js 的路径</div></div><div class="layui-footer"><!-- 底部固定区域 -->底部固定区域</div>
</div><script>
layui.use(['element', 'layer', 'util'], function(){var element = layui.element,layer = layui.layer,util = layui.util,$ = layui.$;console.log(123)$.ajax({url:'${pageContext.request.contextPath }/permission.action?methodName=menus',dataType:'json',success:function(data){var htmlStr = '';$.each(data,function(i,n){htmlStr+='<li class="layui-nav-item layui-nav-itemed">';htmlStr+='<a class="" href="javascript:;">'+n.text+'</a>';if(n.hasChildren){var children = n.children;htmlStr+='<dl class="layui-nav-child">';$.each(children,function(index,node){htmlStr+=' <dd><a href="">'+node.text+'</a></dd>';})htmlStr+='</dl>';}htmlStr+=' </li>';})$("#menu").html(htmlStr);element.render('menu'); }});});
</script>
</body>
</html>
在上述代码中,我们使用Layui的element模块和layer和util模块。通过对树形图进行初始化,其中menu选项为树形图的父容器id,data选项为树形结构的数据,你需要替换成你自己的数据。
四、配置树形图的其他属性和事件:
4.1 实体类
package com.zking.entity;public class Permission {private long id;private String name;private String description;private String url;private long pid;private int ismenu;private long displayno;public Permission() {// TODO Auto-generated constructor stub
}public Permission(String name, String description, String url, long pid, int ismenu, long displayno) {super();this.name = name;this.description = description;this.url = url;this.pid = pid;this.ismenu = ismenu;this.displayno = displayno;
}public long getId() {return id;
}public void setId(long id) {this.id = id;
}public String getName() {return name;
}public void setName(String name) {this.name = name;
}public String getDescription() {return description;
}public void setDescription(String description) {this.description = description;
}public String getUrl() {return url;
}public void setUrl(String url) {this.url = url;
}public long getPid() {return pid;
}public void setPid(long pid) {this.pid = pid;
}public int getIsmenu() {return ismenu;
}public void setIsmenu(int ismenu) {this.ismenu = ismenu;
}public long getDisplayno() {return displayno;
}public void setDisplayno(long displayno) {this.displayno = displayno;
}public Permission(long id, String name, String description, String url, long pid, int ismenu, long displayno) {super();this.id = id;this.name = name;this.description = description;this.url = url;this.pid = pid;this.ismenu = ismenu;this.displayno = displayno;
}@Override
public String toString() {return "Permission [id=" + id + ", name=" + name + ", description=" + description + ", url=" + url + ", pid=" + pid+ ", ismenu=" + ismenu + ", displayno=" + displayno + "]";
}
}
4.2 PermissionDao方法
package com.zking.dao;import java.util.ArrayList;
import java.util.List;import com.fasterxml.jackson.databind.ObjectMapper;
import com.zking.entity.Permission;
import com.zking.util.BaseDao;
import com.zking.util.BuildTree;
import com.zking.util.PageBean;
import com.zking.util.TreeVo;public class PermissionDao extends BaseDao<Permission> {public List<Permission> QueryAll(Permission permission,PageBean pagebean) throws Exception {String sql = "select * from t_easyui_permission";return super.executeQuery(sql, Permission.class, pagebean);}public List<TreeVo<Permission>> menus(Permission permission,PageBean pagebean) throws Exception{List<TreeVo<Permission>> lst = new ArrayList<TreeVo<Permission>>();List<Permission> list = this.QueryAll(permission, pagebean);for (Permission p : list) {TreeVo<Permission> tv = new TreeVo<Permission>();tv.setId(p.getId()+"");tv.setText(p.getName());tv.setParentId(p.getPid()+"");lst.add(tv);}return BuildTree.buildList(lst,"0");}public static void main(String[] args) {try {List<TreeVo<Permission>> menus = new PermissionDao().menus(null, null);ObjectMapper om = new ObjectMapper();System.out.println(om.writeValueAsString(menus));} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}}
}
4.3 PermissionAction类的方法实现
package com.zking.web;import java.util.List;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import com.zking.dao.PermissionDao;
import com.zking.entity.Permission;
import com.zking.framework.ActionSupport;
import com.zking.framework.ModelDriver;
import com.zking.util.ResponseUtil;
import com.zking.util.TreeVo;public class PermissionAction extends ActionSupport implements ModelDriver<Permission> {private Permission p = new Permission();private PermissionDao pd = new PermissionDao();public void menus(HttpServletRequest req, HttpServletResponse resp) {try {List<TreeVo<Permission>> menus = pd.menus(null, null);ResponseUtil.write(resp, menus);} catch (Exception e) {e.printStackTrace();}}@Overridepublic Permission getModel() {// TODO Auto-generated method stubreturn p;}}
4.4 mvc的配置使用
<?xml version="1.0" encoding="UTF-8"?>
<config><action path="/user" type="com.zking.web.UserAction"></action><action path="/permission" type="com.zking.web.PermissionAction"></action></config>
4.5 运行结果
五、异步加载节点数据:
如果你的树形结构数据很大,可以使用异步加载节点数据,按需展示子节点。在tree.render()的配置项中添加url选项即可:
tree.render({elem: '#treeContainer',url: '/api/getTreeData', // 异步请求的接口地址// 其他配置项...
});
在服务端,可以使用相应的后端框架实现/api/getTreeData的接口,返回符合Layui树形图要求的数据格式。
六、拓展功能和样式:
除了基本的配置外,Layui树形图还提供了丰富的API和内置方法,用于实现更多的功能和样式需求。你可以查阅Layui树形图的官方文档,了解各种拓展功能和样式的用法。
结语:
通过Layui树形图,我们可以方便地管理和展示树形结构的数据,提升页面的交互性和可视化效果。希望本文对你对Layui树形图的使用有所帮助,让你的网页在展示树形数据时更加出色!