第一步：在开始之前我们需要准备这么一个js文件，代码如下。我姑且将它命名为tree.js。
[url=] if (node.title) str += ' title="' + node.title + '"';
if (node.target) str += ' target="' + node.target + '"';
if (this.config.useStatusText) str += ' onmouseover="window.status=\'' + node.name + '\';return true;" onmouseout="window.status=\'\';return true;" ';
if (this.config.useSelection && ((node._hc && this.config.folderLinks) || !node._hc))
str += ' onclick="javascript: ' + this.obj + '.s(' + nodeId + ');"';
str += '>';
}
else if ((!this.config.folderLinks || !node.url) && node._hc && node.pid != this.root.id)
str += '<a href="javascript: ' + this.obj + '.o(' + nodeId + ');" href="javascript: ' + this.obj + '.o(' + nodeId + ');" class="node">';
str += node.name;
if (node.url || ((!this.config.folderLinks || !node.url) && node._hc)) str += '</a>';
//[!--begin--]add by wangxr to append str
if(node.appendedStr) str += node.appendedStr;
//[!--end--]
str += '</div>';
if (node._hc) {
str += '<div id="d' + this.obj + nodeId + '" class="clip" style="display:' + ((this.root.id == node.pid || node._io) ? 'block' : 'none') + ';" style="display:' + ((this.root.id == node.pid || node._io) ? 'block' : 'none') + ';">';
str += this.addNode(node);
str += '</div>';
}
this.aIndent.pop();
return str;
};
// Adds the empty and line icons
tree.prototype.indent = function(node, nodeId) {
var str = '';
if (this.root.id != node.pid) {
for (var n=0; n<this.aIndent.length; n++)
str += '<img src="' + ( (this.aIndent[n] == 1 && this.config.useLines) ? this.icon.line : this.icon.empty ) + '" src="' + ( (this.aIndent[n] == 1 && this.config.useLines) ? this.icon.line : this.icon.empty ) + '" alt="" />';
(node._ls) ? this.aIndent.push(0) : this.aIndent.push(1);
if (node._hc) {
str += '<a href="javascript: ' + this.obj + '.o(' + nodeId + ');" href="javascript: ' + this.obj + '.o(' + nodeId + ');"><img id="j' + this.obj + nodeId + '" src="';
if (!this.config.useLines) str += (node._io) ? this.icon.nlMinus : this.icon.nlPlus;
else str += ( (node._io) ? ((node._ls && this.config.useLines) ? this.icon.minusBottom : this.icon.minus) : ((node._ls && this.config.useLines) ? this.icon.plusBottom : this.icon.plus ) );
str += '" src="'; if (!this.config.useLines) str += (node._io) ? this.icon.nlMinus : this.icon.nlPlus; else str += ( (node._io) ? ((node._ls && this.config.useLines) ? this.icon.minusBottom : this.icon.minus) : ((node._ls && this.config.useLines) ? this.icon.plusBottom : this.icon.plus ) ); str += '" alt="" /></a>';
} else str += '<img src="' + ( (this.config.useLines) ? ((node._ls) ? this.icon.joinBottom : this.icon.join ) : this.icon.empty) + '" src="' + ( (this.config.useLines) ? ((node._ls) ? this.icon.joinBottom : this.icon.join ) : this.icon.empty) + '" alt="" />';
}
return str;
};
// Checks if a node has any children and if it is the last sibling
tree.prototype.setCS = function(node) {
var lastId;
for (var n=0; n<this.aNodes.length; n++) {
if (this.aNodes[n].pid == node.id) node._hc = true;
if (this.aNodes[n].pid == node.pid) lastId = this.aNodes[n].id;
}
if (lastId==node.id) node._ls = true;
};
// Returns the selected node
tree.prototype.getSelected = function() {
var sn = this.getCookie('cs' + this.obj);
return (sn) ? sn : null;
};
// Highlights the selected node
tree.prototype.s = function(id) {
if (!this.config.useSelection) return;
var cn = this.aNodes[id];
if (cn._hc && !this.config.folderLinks) return;
if (this.selectedNode != id) {
if (this.selectedNode || this.selectedNode==0) {
eOld = document.getElementById("s" + this.obj + this.selectedNode);
eOld.className = "node";
}
eNew = document.getElementById("s" + this.obj + id);
eNew.className = "nodeSel";
this.selectedNode = id;
if (this.config.useCookies) this.setCookie('cs' + this.obj, cn.id);
}
};
// Toggle Open or close
tree.prototype.o = function(id) {
var cn = this.aNodes[id];
this.nodeStatus(!cn._io, id, cn._ls);
cn._io = !cn._io;
if (this.config.closeSameLevel) this.closeLevel(cn);
if (this.config.useCookies) this.updateCookie();
};
// Open or close all nodes
tree.prototype.oAll = function(status) {
for (var n=0; n<this.aNodes.length; n++) {
if (this.aNodes[n]._hc && this.aNodes[n].pid != this.root.id) {
this.nodeStatus(status, n, this.aNodes[n]._ls)
this.aNodes[n]._io = status;
}
}
if (this.config.useCookies) this.updateCookie();
};
// Opens the tree to a specific node
tree.prototype.openTo = function(nId, bSelect, bFirst) {
if (!bFirst) {
for (var n=0; n<this.aNodes.length; n++) {
if (this.aNodes[n].id == nId) {
nId=n;
break;
}
}
}
var cn=this.aNodes[nId];
if (cn.pid==this.root.id || !cn._p) return;
cn._io = true;
cn._is = bSelect;
if (this.completed && cn._hc) this.nodeStatus(true, cn._ai, cn._ls);
if (this.completed && bSelect) this.s(cn._ai);
else if (bSelect) this._sn=cn._ai;
this.openTo(cn._p._ai, false, true);
};
// Closes all nodes on the same level as certain node
tree.prototype.closeLevel = function(node) {
for (var n=0; n<this.aNodes.length; n++) {
if (this.aNodes[n].pid == node.pid && this.aNodes[n].id != node.id && this.aNodes[n]._hc) {
this.nodeStatus(false, n, this.aNodes[n]._ls);
this.aNodes[n]._io = false;
this.closeAllChildren(this.aNodes[n]);
}
}
}
// Closes all children of a node
tree.prototype.closeAllChildren = function(node) {
for (var n=0; n<this.aNodes.length; n++) {
if (this.aNodes[n].pid == node.id && this.aNodes[n]._hc) {
if (this.aNodes[n]._io) this.nodeStatus(false, n, this.aNodes[n]._ls);
this.aNodes[n]._io = false;
this.closeAllChildren(this.aNodes[n]);
}
}
}
// Change the status of a node(open or closed)
tree.prototype.nodeStatus = function(status, id, bottom) {
eDiv = document.getElementById('d' + this.obj + id);
eJoin = document.getElementById('j' + this.obj + id);
if (this.config.useIcons) {
eIcon = document.getElementById('i' + this.obj + id);
eIcon.src = (status) ? this.aNodes[id].iconOpen : this.aNodes[id].icon;
}
eJoin.src = (this.config.useLines)?
((status)?((bottom)?this.icon.minusBottom:this.icon.minus):((bottom)?this.icon.plusBottom:this.icon.plus)):
((status)?this.icon.nlMinus:this.icon.nlPlus);
eDiv.style.display = (status) ? 'block': 'none';
};
// [Cookie] Clears a cookie
tree.prototype.clearCookie = function() {
var now = new Date();
var yesterday = new Date(now.getTime() - 1000 * 60 * 60 * 24);
this.setCookie('co'+this.obj, 'cookieValue', yesterday);
this.setCookie('cs'+this.obj, 'cookieValue', yesterday);
};
// [Cookie] Sets value in a cookie
tree.prototype.setCookie = function(cookieName, cookieValue, expires, path, domain, secure) {
document.cookie =
escape(cookieName) + '=' + escape(cookieValue)
+ (expires ? '; expires=' + expires.toGMTString() : '')
+ (path ? '; path=' + path : '')
+ (domain ? '; domain=' + domain : '')
+ (secure ? '; secure' : '');
};
// [Cookie] Gets a value from a cookie
tree.prototype.getCookie = function(cookieName) {
var cookieValue = '';
var posName = document.cookie.indexOf(escape(cookieName) + '=');
if (posName != -1) {
var posValue = posName + (escape(cookieName) + '=').length;
var endPos = document.cookie.indexOf(';', posValue);
if (endPos != -1) cookieValue = unescape(document.cookie.substring(posValue, endPos));
else cookieValue = unescape(document.cookie.substring(posValue));
}
return (cookieValue);
};
// [Cookie] Returns ids of open nodes as a string
tree.prototype.updateCookie = function() {
var str = '';
for (var n=0; n<this.aNodes.length; n++) {
if (this.aNodes[n]._io && this.aNodes[n].pid != this.root.id) {
if (str) str += '.';
str += this.aNodes[n].id;
}
}
this.setCookie('co' + this.obj, str);
};
// [Cookie] Checks if a node id is in a cookie
tree.prototype.isOpen = function(id) {
var aOpen = this.getCookie('co' + this.obj).split('.');
for (var n=0; n<aOpen.length; n++)
if (aOpen[n] == id) return true;
return false;
};
// If Push and pop is not implemented by the browser
if (!Array.prototype.push) {
Array.prototype.push = function array_push() {
for(var i=0;i<arguments.length;i++)
this[this.length]=arguments[i];
return this.length;
}
};
if (!Array.prototype.pop) {
Array.prototype.pop = function array_pop() {
lastElement = this[this.length-1];
this.length = Math.max(this.length-1,0);
return lastElement;
}
};
由于代码太长，我这里就不给大家拿来细讲了，我们只要会用就OK。就像猪肉我们能吃就OK，不一定非要知道猪养。
[b]第二步：创建数据库，创建数据库的代码如下，我这边使用的是MySQL数据为。[/b]
create database `treedemo`;
use treedemo;
create table trees(
tid int primary key not null,
pid int not null,
tname varchar(50) not null,
isleaf int
);
select * from trees;
insert into trees(tid,pid,tname)values(0,-1,'组织内容');
insert into trees(tid,pid,tname)values(1,0,'短信');
insert into trees(tid,pid,tname)values(2,0,'彩信');
insert into trees(tid,pid,tname)values(3,0,'新闻');
insert into trees(tid,pid,tname)values(4,1,'移动生活');
insert into trees(tid,pid,tname)values(5,1,'单条滚动点播');
insert into trees(tid,pid,tname)values(6,2,'定制');
insert into trees(tid,pid,tname)values(7,2,'点播');
insert into trees(tid,pid,tname)values(8,3,'房产频道');
insert into trees(tid,pid,tname)values(9,3,'农村频道');
insert into trees(tid,pid,tname)values(10,3,'数码频道');
insert into trees(tid,pid,tname)values(11,6,'幽默笑话');
insert into trees(tid,pid,tname)values(12,7,'铃声');
insert into trees(tid,pid,tname)values(13,7,'贺卡');
insert into trees(tid,pid,tname)values(14,7,'动画');
insert into trees(tid,pid,tname)values(15,13,'贺卡1');
insert into trees(tid,pid,tname)values(16,13,'贺卡2');
insert into trees(tid,pid,tname)values(17,13,'贺卡3');
insert into trees(tid,pid,tname)values(18,13,'贺卡4');
select * from trees;
表字段的说明：
（1）tid表示节点的编号；
（2）pid 该节点父节点的编号；
（3）tname 节点名称；
（4）isleaf 表明该节点是否为叶节点，叶节点为1，非叶节点为0。该字段可根据实际情况增删。
[b]第三步：在myeclipse中创建一个WEB工程，命名为“TreeDemo”。在WebRoot文件夹下创建js文件夹、css文件夹、images文件夹分别用来存放.js文件、.css文件和项目中用到的图片文件。
第四步：编写数据库连接类，其中的用户名、密码需要根据你数据库情况进行修改，代码如下。
[/b]
package com.sx.mas.utils;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class DBConn {
private static final String DRIVER="com.mysql.jdbc.Driver";
private static final String URL="jdbc:mysql://localhost:3306/treedemo";
Connection conn=null;
public Connection getConnection(){
try {
Class.forName(DRIVER);
conn=DriverManager.getConnection(URL,"root","root");
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return conn;
}
}
package com.sx.mas.utils;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class DBConn {
private static final String DRIVER="com.mysql.jdbc.Driver";
private static final String URL="jdbc:mysql://localhost:3306/treedemo";
Connection conn=null;
public Connection getConnection(){
try {
Class.forName(DRIVER);
conn=DriverManager.getConnection(URL,"root","root");
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return conn;
}
}
[b]第五步：编写javabean类，代码如下，
[/b]
[url=css/tree.css]<LINK href="css/css.css" href="css/css.css" rel=stylesheet>
<SCRIPT src="js/tree.js" src="js/tree.js" type=text/javascript></SCRIPT>
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css" href="styles.css">
-->
</head>
<body onresize="return true;" leftMargin=1 topMargin=1>
<table>
<tr>
<td valign="top">
<TABLE class=table_left_menu cellSpacing=0 cellPadding=0 width="100%"
background=images/tree_bg.gif border=0>
<TBODY>
<TR>
<TD>
<DIV align=center><IMG height=24 src="images/tree_button.gif" src="images/tree_button.gif"
width=147 useMap=#Map border=0>
<MAP id=Map name=Map>
<AREA shape="RECT" shape="RECT" coords="16,3,69,15" coords="16,3,69,15" href="javascript:%20d.openAll()" href="javascript:%20d.openAll()">
<AREA shape="RECT" shape="RECT" coords="72,3,131,15" coords="72,3,131,15" href="javascript:%20d.closeAll()" href="javascript:%20d.closeAll()">
</MAP>
</DIV>
</TD>
</TR>
</TBODY>
</TABLE>
<SCRIPT type=text/javascript>
d = new tree('d','../');
<%
TreeDAO treedao = new TreeDAO();
Vector vec =treedao.getTree();
Iterator iterator = vec.iterator();
while(iterator.hasNext()){
TreeNode treenode = (TreeNode)iterator.next();
if(treenode.getIsleaf()==0){
%>
d.add(<%=treenode.getTid()%>,<%=treenode.getPid()%>,'<%=treenode.getTname()%>')
<%}else{%>
d.add(<%=treenode.getTid()%>,<%=treenode.getPid()%>,'<%=treenode.getTname()%>',parent.getUrlByCatalogId('<%=treenode.getTid()%>'),null,'list');
<%}}%>
document.write(d);
</SCRIPT>
</td>
</tr>
</table>
</body>
</html>
<%@ page language="java" import="java.util.*" contentType="text/html; charset=gb2312"%>
<%@ page import="com.sx.mas.beans.*" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<LINK href="css/tree.css" href="css/tree.css" type=text/css rel=stylesheet>
<LINK href="css/css.css" href="css/css.css" rel=stylesheet>
<SCRIPT src="js/tree.js" src="js/tree.js" type=text/javascript></SCRIPT>
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css" href="styles.css">
-->
</head>
<body onresize="return true;" leftMargin=1 topMargin=1>
<table>
<tr>
<td valign="top">
<TABLE class=table_left_menu cellSpacing=0 cellPadding=0 width="100%"
background=images/tree_bg.gif border=0>
<TBODY>
<TR>
<TD>
<DIV align=center><IMG height=24 src="images/tree_button.gif" src="images/tree_button.gif"
width=147 useMap=#Map border=0>
<MAP id=Map name=Map>
<AREA shape="RECT" shape="RECT" coords="16,3,69,15" coords="16,3,69,15" href="javascript:%20d.openAll()" href="javascript:%20d.openAll()">
<AREA shape="RECT" shape="RECT" coords="72,3,131,15" coords="72,3,131,15" href="javascript:%20d.closeAll()" href="javascript:%20d.closeAll()">
</MAP>
</DIV>
</TD>
</TR>
</TBODY>
</TABLE>
<SCRIPT type=text/javascript>
d = new tree('d','../');
<%
TreeDAO treedao = new TreeDAO();
Vector vec =treedao.getTree();
Iterator iterator = vec.iterator();
while(iterator.hasNext()){
TreeNode treenode = (TreeNode)iterator.next();
if(treenode.getIsleaf()==0){
%>
d.add(<%=treenode.getTid()%>,<%=treenode.getPid()%>,'<%=treenode.getTname()%>')
<%}else{%>
d.add(<%=treenode.getTid()%>,<%=treenode.getPid()%>,'<%=treenode.getTname()%>',parent.getUrlByCatalogId('<%=treenode.getTid()%>'),null,'list');
<%}}%>
document.write(d);
</SCRIPT>
</td>
</tr>
</table>
</body>
</html>
第八步：创建一个框架页面，index.html代码如下，和list_default.htm。
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Frameset//EN">
<!-- saved from url=(0203)http://211.142.31.211:8050/cms/content/content_frame.jsp?eafplaceholder=1&staffId=11010000&ssessionId=A5704FD79B3367C9FBE67681C048CA6A×tamp=1240457326218&secret=649820873&menuId=10081&labelStyle=DLS -->
<HTML><HEAD><TITLE></TITLE>
<META http-equiv=Content-Type content="text/html; charset=gb2312"><LINK href=""
type=text/css rel=stylesheet>
<SCRIPT type=text/javascript>
function getUrlByCatalogId(catalogId) {
return "TreeDemo/content_add.jsp?catalogId="+catalogId;
}
</SCRIPT>
<META content="MSHTML 6.00.2900.3527" name=GENERATOR></HEAD><FRAMESET border=0
frameSpacing=0 rows=* frameBorder=0>
<FRAMESET border=0 frameSpacing=1 frameBorder=0 cols=200,*>
<FRAME name=stree src="show_cat_tree.jsp" src="show_tree.jsp" scrolling=yes target="list">
<FRAME name=list src="list_default.htm" src="list_default.htm"><NOFRAMES>
<body>
</body>
</NOFRAMES></FRAMESET></FRAMESET></HTML>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Frameset//EN">
<!-- saved from url=(0203)http://211.142.31.211:8050/cms/content/content_frame.jsp?eafplaceholder=1&staffId=11010000&ssessionId=A5704FD79B3367C9FBE67681C048CA6A×tamp=1240457326218&secret=649820873&menuId=10081&labelStyle=DLS -->
<HTML><HEAD><TITLE></TITLE>
<META http-equiv=Content-Type content="text/html; charset=gb2312"><LINK href=""
type=text/css rel=stylesheet>
<SCRIPT type=text/javascript>
function getUrlByCatalogId(catalogId) {
return "TreeDemo/content_add.jsp?catalogId="+catalogId;
}
</SCRIPT>
<META content="MSHTML 6.00.2900.3527" name=GENERATOR></HEAD><FRAMESET border=0
frameSpacing=0 rows=* frameBorder=0>
<FRAMESET border=0 frameSpacing=1 frameBorder=0 cols=200,*>
<FRAME name=stree src="show_cat_tree.jsp" src="show_tree.jsp" scrolling=yes target="list">
<FRAME name=list src="list_default.htm" src="list_default.htm"><NOFRAMES>
<body>
</body>
</NOFRAMES></FRAMESET></FRAMESET></HTML>
第九步：运行效果
备注：如有需要源码的请直接联系QQ398349538。
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