Dtree+Jquery动态生成树节点

桃扇骨 2022-07-12 14:58 200阅读 0赞

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  
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

4：页面代码书写的位置是：一般写在表格的td之中

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);  
  
&nbsp;

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>  
&nbsp;<head>  
&nbsp;&nbsp;<title>树形结构\_\_\_ajax请求方式</title>  
&nbsp;&nbsp;<script type="text/javascript" src="dtree.js"></script>  
&nbsp;&nbsp;<script type="text/javascript" src="jquery.js"></script>  
&nbsp;&nbsp;<link rel="stylesheet" href="dtree.css" type="text/css"></link>  
&nbsp;&nbsp;<script type="text/javascript">  
&nbsp;&nbsp;&nbsp;tree = new dTree('tree');//创建一个对象.  
&nbsp;&nbsp;&nbsp;$.ajax(\{  
&nbsp;&nbsp;&nbsp;&nbsp;<A href="'NodesPrint'">url:'NodesPrint'</A>,  
&nbsp;&nbsp;&nbsp;&nbsp;type:'post', //数据发送方式  
&nbsp;&nbsp;&nbsp;&nbsp;dataType:'xml', //接受数据格式  
&nbsp;&nbsp;&nbsp;&nbsp;error:function(json)\{  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; alert( "not lived!");  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \},  
&nbsp;&nbsp;&nbsp;&nbsp;async: false ,//同步方式  
&nbsp;&nbsp;&nbsp;&nbsp;success: function(xml)\{  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $(xml).find("node").each(function()\{  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; var nodeId=$(this).attr("nodeId");&nbsp;  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; var parentId=$(this).attr("parentId");&nbsp;  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; var hrefAddress=$(this).attr("hrefAddress");&nbsp;  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; var nodeName=$(this).text();  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; tree.add(nodeId,parentId,nodeName,hrefAddress,"","","","",false);  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \});  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \}  
&nbsp;&nbsp;&nbsp;&nbsp; \});  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; document.write(tree);  
&nbsp;&nbsp;</script>  
&nbsp;</head>  
&nbsp;<body>  
&nbsp;</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