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发表时间：2009-03-16
最后修改：2010-07-25
Dtree+Jquery动态生成树节点.
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 2：dtree.js文件中
<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 .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({
url:'NodesPrint',
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>
demo的结构图:
附件说明. 1.tree2.jsp.一个简单jsp。静态生成一个树结构 2.dtree的用法文章及其例子. 3.dtree+jquery动态生成树的demo_____DtreeTest
声明：ITeye文章版权属于作者，受法律保护。没有作者书面许可不得转载。
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发表时间：2009-03-19
哈哈.太菜啦。还是，没人评论啦.看来都是高手呀..
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发表时间：2009-03-25
谢谢楼主，我看了您的东西，并且下载了。在此表示感谢。
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发表时间：2009-03-25
本人dtree用的也比较多，谢谢楼主分享
dtree对于超过1000个节点的操作，速度变慢，效果很不理想， 请问有没有好的解决办法呢 |
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发表时间：2009-03-26
当节点数少时是发现不了问题的, 节点数多的时候还不仅仅是加载树的过程特别慢，直接就是一个致命的错误——堆栈溢出.
听说有另外一种技术叫做: " 梅花雪树" 当然，如果树比较小，DTree在使用上还是很方便的，毕竟它的结构比梅花雪树要简单，也没有那些过多的资源和js脚本需要引入。 |
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发表时间：2009-04-15
感谢楼主 非常有用
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发表时间：2009-04-16
干嘛不把节点直接存到xml中呢，xml和数据库差不多
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发表时间：2009-05-24
嗯，很好，小弟也在搞这个呢，动态的使用javaBean生产dtree，呵呵。
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发表时间：2009-06-21
zaowazong 写道 本人dtree用的也比较多，谢谢楼主分享
dtree对于超过1000个节点的操作，速度变慢，效果很不理想， 请问有没有好的解决办法呢 我也有同样的问题，有好的解决方法吗？ |
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发表时间：2009-07-15
写的不错
为什么我的测试实现不了啊 |
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