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[JSP] JSP 动态树的实现

开发技术 开发技术 发布于:2021-10-24 13:07 | 阅读数:414 | 评论:0

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。
function Node(id, pid, name, url, title, target, icon, iconOpen, open, appendedStr) { 
  this.id = id; 
  this.pid = pid; 
  this.name = name; 
  this.url = url; 
  this.title = title; 
  this.target = target; 
  this.icon = icon; 
  this.iconOpen = iconOpen; 
  this.appendedStr = appendedStr; 
  this._io = open || false; 
  this._is = false; 
  this._ls = false; 
  this._hc = false; 
  this._ai = 0; 
  this._p; 
}; 
// Tree object 
function tree(objName,path) { 
  this.path = path; 
  this.config = { 
    target          : null, 
    folderLinks      : true, 
    useSelection    : true, 
    useCookies      : true, 
    useLines        : true, 
    useIcons        : true, 
    useStatusText    : false, 
    closeSameLevel  : false, 
    inOrder          : false 
  } 
  this.icon = { 
    root        : path + 'TreeDemo/images/tree_base.gif', 
    folder      : path + 'TreeDemo/images/tree_folder.gif', 
    folderOpen  : path + 'TreeDemo/images/tree_folderopen.gif', 
    node        : path + 'TreeDemo/images/tree_folder.gif', 
    empty        : path + 'TreeDemo/images/tree_empty.gif', 
    line        : path + 'TreeDemo/images/tree_line.gif', 
    join        : path + 'TreeDemo/images/tree_join.gif', 
    joinBottom  : path + 'TreeDemo/images/tree_joinbottom.gif', 
    plus        : path + 'TreeDemo/images/tree_plus.gif', 
    plusBottom  : path + 'TreeDemo/images/tree_plusbottom.gif', 
    minus        : path + 'TreeDemo/images/tree_minus.gif', 
    minusBottom  : path + 'TreeDemo/images/tree_minusbottom.gif', 
    nlPlus      : path + 'TreeDemo/images/tree_nolines_plus.gif', 
    nlMinus      : path + 'TreeDemo/images/tree_nolines_minus.gif' 
  }; 
  this.obj = objName; 
  this.aNodes = []; 
  this.aIndent = []; 
  this.root = new Node(-1); 
  this.selectedNode = null; 
  this.selectedFound = false; 
  this.completed = false; 
}; 
// Adds a new node to the node array 
tree.prototype.add = function(id, pid, name, url, title, target, icon, iconOpen, open, appendedStr) { 
  this.aNodes[this.aNodes.length] = new Node(id, pid, name, url, title, target, icon, iconOpen, open, appendedStr); 
}; 
// Open/close all nodes 
tree.prototype.openAll = function() { 
  this.oAll(true); 
}; 
tree.prototype.closeAll = function() { 
  this.oAll(false); 
}; 
// Outputs the tree to the page 
tree.prototype.toString = function() { 
  var str = '<div class="tree">\n'; 
  if (document.getElementById) { 
    if (this.config.useCookies) this.selectedNode = this.getSelected(); 
    str += this.addNode(this.root); 
  } else str += 'Browser not supported.'; 
  str += '</div>'; 
  if (!this.selectedFound) this.selectedNode = null; 
  this.completed = true; 
  return str; 
}; 
// Creates the tree structure 
tree.prototype.addNode = function(pNode) { 
  var str = ''; 
  var n=0; 
  if (this.config.inOrder) n = pNode._ai; 
  for (n; n<this.aNodes.length; n++) { 
    if (this.aNodes[n].pid == pNode.id) { 
      var cn = this.aNodes[n]; 
      cn._p = pNode; 
      cn._ai = n; 
      this.setCS(cn); 
      if (!cn.target && this.config.target) cn.target = this.config.target; 
      if (cn._hc && !cn._io && this.config.useCookies) cn._io = this.isOpen(cn.id); 
      if (!this.config.folderLinks && cn._hc) cn.url = null; 
      if (this.config.useSelection && cn.id == this.selectedNode && !this.selectedFound) { 
          cn._is = true; 
          this.selectedNode = n; 
          this.selectedFound = true; 
      } 
      str += this.node(cn, n); 
      if (cn._ls) break; 
    } 
  } 
  return str; 
}; 
// Creates the node icon, url and text 
tree.prototype.node = function(node, nodeId) { 
  var str = '<div class="treeNode">' + this.indent(node, nodeId); 
  if (this.config.useIcons) { 
    if (!node.icon) node.icon = (this.root.id == node.pid) ? this.icon.root : ((node._hc) ? this.icon.folder : this.icon.node); 
    if (!node.iconOpen) node.iconOpen = (node._hc) ? this.icon.folderOpen : this.icon.node; 
    if (this.root.id == node.pid) { 
      node.icon = this.icon.root; 
      node.iconOpen = this.icon.root; 
    } 
    str += '<img id="i' + this.obj + nodeId + '" src="' + ((node._io) ? node.iconOpen : node.icon) + '" src="' + ((node._io) ? node.iconOpen : node.icon) + '" alt="" />'; 
  } 
  if (node.url) { 
    str += '<a id="s' + this.obj + nodeId + '" class="' + ((this.config.useSelection) ? ((node._is ? 'nodeSel' : 'node')) : 'node') + '" href="' + node.url + '" href="' + node.url + '"'; 
    if (node.title) str += ' title="' + node.title + '"'; 
    if (node.target) str += ' target="' + node.target + '"'; 
    if (this.config.useStatusText) str += '  onmouseout="window.status=\'\';return true;" '; 
    if (this.config.useSelection && ((node._hc && this.config.folderLinks) || !node._hc)) 
      str += ' '; 
    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。
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。
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。

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。
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; 
  } 
}
第五步:编写javabean类,代码如下,
package com.sx.mas.beans; 
public class TreeNode { 
private int tid; 
private int pid; 
private String tname; 
private int isleaf; 
public int getTid() { 
return tid; 
} 
public void setTid(int tid) { 
this.tid = tid; 
} 
public int getPid() { 
return pid; 
} 
public void setPid(int pid) { 
this.pid = pid; 
} 
public String getTname() { 
return tname; 
} 
public void setTname(String tname) { 
this.tname = tname; 
} 
public int getIsleaf() { 
return isleaf; 
} 
public void setIsleaf(int isleaf) { 
this.isleaf = isleaf; 
} 
} 
package com.sx.mas.beans; 
public class TreeNode { 
  private int tid; 
  private int pid; 
  private String tname; 
  private int isleaf; 
  public int getTid() { 
    return tid; 
  } 
  public void setTid(int tid) { 
    this.tid = tid; 
  } 
  public int getPid() { 
    return pid; 
  } 
  public void setPid(int pid) { 
    this.pid = pid; 
  } 
  public String getTname() { 
    return tname; 
  } 
  public void setTname(String tname) { 
    this.tname = tname; 
  } 
  public int getIsleaf() { 
    return isleaf; 
  } 
  public void setIsleaf(int isleaf) { 
    this.isleaf = isleaf; 
  } 
}
第六步:创建相关的DAO类,代码如下。DAO类将数据库表装保存到Vector对象中。
package com.sx.mas.beans; 
import java.sql.Connection; 
import java.sql.ResultSet; 
import java.sql.SQLException; 
import java.sql.Statement; 
import java.util.Vector; 
import com.sx.mas.utils.DBConn; 
public class TreeDAO { 
public Vector getTree(){ 
Vector vec = new Vector(); 
DBConn dbconn = new DBConn(); 
Connection conn = dbconn.getConnection(); 
try { 
Statement stmt = conn.createStatement(); 
ResultSet rs = stmt.executeQuery("select * from trees"); 
while(rs.next()){ 
TreeNode treenode = new TreeNode(); 
treenode.setTid(rs.getInt("tid")); 
treenode.setPid(rs.getInt("pid")); 
treenode.setTname(rs.getString("tname")); 
treenode.setIsleaf(rs.getInt("isleaf")); 
vec.add(treenode); 
} 
} catch (SQLException e) { 
// TODO Auto-generated catch block 
e.printStackTrace(); 
} 
return vec; 
} 
} 
package com.sx.mas.beans; 
import java.sql.Connection; 
import java.sql.ResultSet; 
import java.sql.SQLException; 
import java.sql.Statement; 
import java.util.Vector; 
import com.sx.mas.utils.DBConn; 
public class TreeDAO { 
  public Vector getTree(){ 
    Vector vec = new Vector(); 
    DBConn dbconn = new DBConn(); 
    Connection conn = dbconn.getConnection(); 
    try { 
      Statement stmt = conn.createStatement(); 
      ResultSet rs = stmt.executeQuery("select * from trees"); 
      while(rs.next()){ 
        TreeNode treenode = new TreeNode(); 
        treenode.setTid(rs.getInt("tid")); 
        treenode.setPid(rs.getInt("pid")); 
        treenode.setTname(rs.getString("tname")); 
       treenode.setIsleaf(rs.getInt("isleaf")); 
        vec.add(treenode); 
      } 
    } catch (SQLException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
    } 
    return vec; 
  } 
}
第七步:页面上显示树状结构。在TreeDemo中创建show_tree.jsp页面,代码如下。
<%@ 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> 
<%@ 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)https://211.142.31.211:8050/cms/content/content_frame.jsp?eafplaceholder=1&staffId=11010000&ssessionId=A5704FD79B3367C9FBE67681C048CA6A&timestamp=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)https://211.142.31.211:8050/cms/content/content_frame.jsp?eafplaceholder=1&staffId=11010000&ssessionId=A5704FD79B3367C9FBE67681C048CA6A&timestamp=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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