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Dtree+Jquery动态生成树节点.

2012-12-22 22:58 465 查看

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

Html代码

.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;

}

Javascript代码

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)

Java代码

<%@ 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.

Sql代码

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.

Java代码

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.

Java代码

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");

Java代码

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.

Java代码

<%@ 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>

demo的结构图:

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