Dtree+jQuery实现动态树结构
Dtree+Jquery动态生成树节点.
最近有朋友问我一个动态生成树怎么做.后来就用Dtree js组件和Jquery实现了一个demo给他.现在贴出来给初学者做些参考.
1.先来介绍一下. dtree 的用法.(我引用了以前我收集的一篇文章.还比较详细,出处不记得啦).文章下面会附带dtree用法的例子.
Dtree目录树的总结
一：函数
1：页面中
tree.add(id,pid,name,url,title,target,icon,iconOpen,open);
参数说明：
id ：节点自身的id
pid ：节点的父节点的id
name ：节点显示在页面上的名称
url ：节点的链接地址
title ：鼠标放在节点上所出现的提示信息
target ：节点链接所打开的目标frame(如框架目标mainFrame,_blank,_self 类)
icon ：节点关闭时的显示图片的路径
iconOpen：节点打开时的显示图片的路径
open ：布尔型，节点是否打开（默认为false）
注：open项：顶级节点一般采用true，即pid是－1的节点
2：dtree.js文件中
约87－113行是一些默认图片的路径，注意要指对。
二：页面中的书写
1：默认值的书写规则（从左至右，依次省略）
即 tree.add(id,pid,name,url);后面5个参数可以省略
2：有间隔时的默认值（如存在第6个参数，但第5个参数想用默认值）
即 tree.add(id,pid,name,url,"",target);必须这样写
3：样式表
（1）：可以将dtree.css中的样式附加到你的应用中的主css中，如a.css
（2）：也可以同时引用dtree.css与a.css两个文件，但前提条件是两个css文件中不能有重复的样式
- <link href="/jingjindatabase/pub/css/a.css" rel="stylesheet" type="text/css" />
- <link href="/jingjindatabase/pub/css/dtree.css" rel="stylesheet" type="text/css" />
4：页面代码书写的位置是：一般写在表格的td之中
- <script type="text/javascript" src="/myMobanGis/pub/js/dtree.js"></script>
- <script type="text/javascript">
- tree = new dTree('tree');
- tree.add("1","-1","京津","","","","","",true);
- tree.add("11","1","A","","","","","",true);
- tree.add("110","11","A-1","content.jsp?moduleName=XXX","","mainFrame");
- tree.add("111","11","A-2","javascript:void(0)","","链接在哪里显示");
- tree.add("112","11","A-3","javascript:void(0)","","mainFrame");
- tree.add("113","11","A-4","/.jsp","","mainFrame");
- tree.add("114","11","A-5","/.jsp","","mainFrame");
- tree.add("115","11","A-6","/.jsp","","mainFrame");
- tree.add("12","1","B","","","","","",true);
- tree.add("121","12","B-1","javascript:调用本页内的js函数","","mainFrame");
- tree.add("122","12","B-2");
- tree.add("13","1","C","","","","","",true);
- tree.add("131","13","C-1","javascript:void(0)","","mainFrame");
- tree.add("132","13","C-2","javascript:void(0)","","mainFrame");
- tree.add("133","13","C-3","javascript:void(0)","","mainFrame");
- tree.add("14","1","D","","","","","",true);
- tree.add("141","14","D-1","javascript:void(0)","","mainFrame");
- document.write(tree);
- </script>
说明：这是静态的代码，动态的可用循环加入。其他 tree.add(id,pid,name,url,"","","","",true);
三：css文件的注解
1:dtree.css
- .dtree {//定义目录树节点的字体，字号，颜色
- font-family: Verdana, Geneva, Arial, Helvetica, sans-serif;
- font-size: 12px;
- color: #006600;
- white-space: nowrap;
- }
- .dtree img {//定义选用节点图标的样式，位置
- border: 0px;
- vertical-align: middle;
- }
- .dtree a {//
- color: #006600;
- text-decoration: none;
- }
- .dtree a.node, .dtree a.nodeSel {
- white-space: nowrap;
- padding: 0px 0px 0px 0px;
- }
- .dtree a.node:hover, .dtree a.nodeSel:hover {
- color: #006600;
- text-decoration: none;
- }
- .dtree a.nodeSel {
- background-color: #c0d2ec;
- }
- .dtree .clip {
- overflow: hidden;
- }
- a = new dTree('a');
- a.config.useStatusText=true;
- a.config.closeSameLevel=true;
- a.config.useCookies=false;
- a.add(0,-1,'Tree example','javascript: void(0);');
- a.add(1, 0,'Node 1','javascript:void(0);');
- a.add(2, 1,'Node 2','javascript:void(0);');
- a.add(3, 1,'Node 3','javascript:void(0);');
- a.add(4, 0,'Node 4','javascript:void(0);');
- a.add(5, 4,'Node 5','javascript:void(0);');
- a.add(6, 4,'Node 6','javascript:void(0);');
- a.add(7, 2,'Node 7','javascript:void(0);');
- a.add(8, 6,'Node 8','javascript:void(0);');
- a.add(9, 1,'Node 9','javascript:void(0);');
- a.add(10, 2,'Node 10','javascript:void(0);');
- a.add(11, 8,'Node 11','javascript:void(0);');
- a.add(12, 2,'Node 12','javascript:void(0);');
- a.add(13, 9,'Node 13','javascript:void(0);');
- a.add(14, 4,'Node 14','javascript:void(0);');
- a.add(15, 2,'Node 15','javascript:void(0);');
- a.add(16, 1,'Node 16','javascript:void(0);');
- a.add(17, 4,'Node 17','javascript:void(0);');
- a.add(18, 6,'Node 18','javascript:void(0);');
- a.add(19, 7,'Node 19','javascript:void(0);');
- document.write(a);
tree2.jsp demo中的一个jsp页面. 静态的生成一棵树. (二级节点)
- <%@ page language="java" pageEncoding="utf-8"%>
- <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
- <html>
- <head>
- <title>树形结构_____普通生成树的方式</title>
- <link rel="stylesheet" href="dtree.css" type="text/css"></link>
- <script type="text/javascript" src="dtree.js"></script>
- <script>
- /*
- tree.add(id,pid,name,url,title,target,icon,iconOpen,open);
- id ：节点自身的id
- pid ：节点的父节点的id
- name ：节点显示在页面上的名称
- url ：节点的链接地址
- title ：鼠标放在节点上所出现的提示信息
- target ：节点链接所打开的目标frame（如框架目标mainFrame或是_blank,_self之类）
- icon ：节点关闭时的显示图片的路径
- iconOpen ：节点打开时的显示图片的路径
- open ：布尔型，节点是否打开（默认为false）
- ------------------------------------------------
- 东城区、西城区、崇文区、宣武区、朝阳区、丰台区、石景山区、
- 海淀区、门头沟区、房山区、通州区、顺义区、 昌平区、
- 大兴区、怀柔区、平谷区 、 密云县、延庆县
- ------------------------------------------------
- */
- </script>
- <script type="text/javascript">
- tree = new dTree('tree');//创建一个对象.
- tree.add("1","-1","中国","","","","","",false);
- tree.add("11","1","北京","","","","","",false);
- tree.add("110","11","东城区","连接地址可以从数据库里面动态查询出来..","东城区","打开目标位置");
- tree.add("111","11","西城区","连接地址可以从数据库里面动态查询出来..","","链接在哪里显示");
- tree.add("112","11","崇文区","连接地址可以从数据库里面动态查询出来..","","mainFrame");
- tree.add("113","11","宣武区","","","_blank");
- tree.add("114","11","朝阳区","/.jsp","","mainFrame");
- tree.add("115","11","丰台区","/.jsp","","mainFrame");
- tree.add("116","11","石景山区","/.jsp","","mainFrame");
- tree.add("117","11","海淀区","/.jsp","","mainFrame");
- tree.add("118","11","门头沟区","/.jsp","","mainFrame");
- tree.add("119","11","房山区","/.jsp","","mainFrame");
- tree.add("120","11","通州区","/.jsp","","mainFrame");
- tree.add("121","11","顺义区","/.jsp","","mainFrame");
- tree.add("122","11","昌平区","/.jsp","","mainFrame");
- tree.add("123","11","大兴区","/.jsp","","mainFrame");
- tree.add("124","11","怀柔区","/.jsp","","mainFrame");
- tree.add("125","11","平谷区","/.jsp","","mainFrame");
- tree.add("126","11","延庆县","/.jsp","","mainFrame");
- tree.add("127","11","密云县","/.jsp","","mainFrame");
- //==================================================
- tree.add("12","1","湖南","","","","","",false);
- tree.add("121","12","株洲","javascript:调用本页内的js函数","","mainFrame");
- tree.add("122","12","长沙");
- //====================================================
- tree.add("13","1","湖北","","","","","",false);
- tree.add("131","13","武汉","javascript:void()","","mainFrame");
- tree.add("132","13","宜昌","javascript:void()","","mainFrame");
- tree.add("133","13","孝感","javascript:void()","","mainFrame");
- //===================================================
- tree.add("14","1","广东","","","","","",false);
- tree.add("141","14","佛山","javascript:void()","","mainFrame");
- document.write(tree);
- </script>
- </head>
- <body>
- </body>
- </html>
不罗嗦啦..上面的只是让你大概了解一下.dtree怎么用.
dtree+JQuery动态生成树.思路其实很简单... 首先把树的节点信息存储到数据库,然后在servlet或jsp中获取数据库表中的数据,把这些信息写成在xml文件中.然后界面jsp页面通过JQuery实现对改servlet的请求.并且回调方法中接受xml数据对象.并且遍历xml文件,取得xml文件中的节点的属性或文本数据.再循环的对dtree添加节点.。
1 . 在 MYSQL 中的test数据库中创建表.tree_table.
SQL语句.
- tree_table CREATE TABLE `tree_table` (
- `id` int(11) NOT NULL auto_increment,
- `nodeId` varchar(12) NOT NULL ,
- `parentId` varchar(12) NOT NULL ,
- `hrefAddress` varchar(85) ,
- `nodeName` varchar(20) ,
- PRIMARY KEY (`id`)
- ) ENGINE=InnoDB DEFAULT CHARSET=gbk
2.连接数据库的类.主要是读取表中的数据.
- package com.dao;
- import java.sql.Connection;
- import java.sql.DriverManager;
- import java.sql.PreparedStatement;
- import java.sql.ResultSet;
- import java.sql.SQLException;
- import java.util.ArrayList;
- public class DaoTest {
- Connection con = null;
- public Connection getConnection() {
- Connection conn = null;
- String url = "jdbc:mysql://localhost/test?useUnicode=true&characterEncoding=gbk";
- String user = "root";
- String password = "admin";
- try {
- if (conn == null) {
- Class.forName("com.mysql.jdbc.Driver").newInstance();
- conn = DriverManager.getConnection(url, user, password);
- }
- } catch (Exception e) {
- System.out.println("连接失败");
- return null;
- } finally {
- url = null;
- user = null;
- password = null;
- }
- return conn;
- }
- public ArrayList<Nodes> getNodeInfo() {
- String sql = "select nodeId ,parentId ,hrefAddress ,nodeName from tree_table order by id ";
- PreparedStatement pre = null;
- Connection conn = null;
- conn = getConnection();
- ResultSet rs = null;
- ArrayList<Nodes> list = new ArrayList<Nodes>();
- try {
- pre = conn.prepareStatement(sql);
- rs =pre.executeQuery();
- while (rs.next()){
- Nodes node = new Nodes();
- node.setHrefAddress(rs.getString("hrefAddress"));
- node.setNodeId(rs.getString("nodeId"));
- node.setParentId(rs.getString("parentId"));
- node.setNodeName(rs.getString("nodeName"));
- list.add(node);
- }
- rs.close();
- pre.close();
- conn.close();
- } catch (SQLException e) {
- e.printStackTrace();
- }finally{
- pre = null;
- conn = null;
- rs = null;
- }
- return list;
- }
- }
3. 节点。JAVABEAN.类.
- package com.dao;
- public class Nodes {
- private int id;
- private String nodeId;
- private String parentId;
- private String hrefAddress;
- private String nodeName;
- public int getId() {
- return id;
- }
- public void setId(int id) {
- this.id = id;
- }
- public String getNodeId() {
- return nodeId;
- }
- public void setNodeId(String nodeId) {
- this.nodeId = nodeId;
- }
- public String getParentId() {
- return parentId;
- }
- public void setParentId(String parentId) {
- this.parentId = parentId;
- }
- public String getHrefAddress() {
- return hrefAddress;
- }
- public void setHrefAddress(String hrefAddress) {
- this.hrefAddress = hrefAddress;
- }
- public String getNodeName() {
- return nodeName;
- }
- public void setNodeName(String nodeName) {
- this.nodeName = nodeName;
- }
- }
4.创建一个Serlvet 来生成xml文件.
注意: response.setContentType("text/xml;charset=utf-8");
- package com.handler;
- import java.io.IOException;
- import java.io.PrintWriter;
- import java.util.ArrayList;
- import javax.servlet.ServletException;
- import javax.servlet.http.HttpServlet;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
- import com.dao.DaoTest;
- import com.dao.Nodes;
- public class NodesPrint extends HttpServlet {
- private static final long serialVersionUID = 1L;
- public void doGet(HttpServletRequest request, HttpServletResponse response)
- throws ServletException, IOException {
- doPost(request, response);
- }
- public void doPost(HttpServletRequest request, HttpServletResponse response)
- throws ServletException, IOException {
- request.setCharacterEncoding("utf-8");
- response.setContentType("text/xml;charset=utf-8");
- PrintWriter out = response.getWriter();
- DaoTest test = new DaoTest();
- ArrayList<Nodes> list= test.getNodeInfo();
- if(list!=null&&list.size()>0){
- out.println("<?xml version=/"1.0/" encoding=/"UTF-8/"?>");
- out.println("<nodes>");
- for(int i=0;i<list.size();i++){
- Nodes node = list.get(i);
- out.println("<node nodeId='"+node.getNodeId()+"' parentId='"+node.getParentId()+"' hrefAddress='"+node.getHrefAddress()+"'>"+node.getNodeName()+"</node>");
- }
- out.println("</nodes>");
- }
- }
- }
5. 将dtree.js 和dtree.css，jquery.js, img文件夹.放在WebRoot下面.(工程的根目录)
6. 编写我们的tree.jsp页面.
- <%@ page language="java" pageEncoding="utf-8"%>
- <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
- <html>
- <head>
- <title>树形结构___ajax请求方式</title>
- <script type="text/javascript" src="dtree.js"></script>
- <script type="text/javascript" src="jquery.js"></script>
- <link rel="stylesheet" href="dtree.css" type="text/css"></link>
- <script type="text/javascript">
- tree = new dTree('tree');//创建一个对象.
- $.ajax({
- <A href="/admin/blogs/350056/'NodesPrint'">url:'NodesPrint'</A>,
- type:'post', //数据发送方式
- dataType:'xml', //接受数据格式
- error:function(json){
- alert( "not lived!");
- },
- async: false ,//同步方式
- success: function(xml){
- $(xml).find("node").each(function(){
- var nodeId=$(this).attr("nodeId");
- var parentId=$(this).attr("parentId");
- var hrefAddress=$(this).attr("hrefAddress");
- var nodeName=$(this).text();
- tree.add(nodeId,parentId,nodeName,hrefAddress,"","","","",false);
- });
- }
- });
- document.write(tree);
- </script>
- </head>
- <body>
- </body>
- </html>