dtree 网页树状菜单及传递对象集合到js内，动态生成节点

在winform端，树状菜单是非常有用的，实现这个是非常便捷的，所以我想到在页面放入一个树状菜单的。我选择了dtree这个工具，网络上还有很多方法实现页面树状菜单的，不过我觉得这个比较好用的，而且配置比较简单，运用上上手很快。dtree是纯js的，所以不用导入jar包，并且配置只要在js内配置就好了。而且现在网络上有很多高手修改后的改良版，加了checkbox，更加方便。在开发过程中，最难的就是数据的交互的，因为dtree是纯js的，所以不存在和后台交互的方法，我的办法是先通过后台交互，将数据传递到页面，然后再传递到js内。后台传递到页面的数据我拼接成一个字符串，然后在js内切割，将数据整合成数组。
后台数据处理代码：

Codepublic String GetLinkManByDID(){ 
try { 
directories = this.directoryService.GetAllDirecoty(); 
selectlinkMans = this.linkManService.GetAllLinkMans(); 
String direStringstring = ""; 
String linkString = ""; 
for (int i = 0; i < directories.size(); i++) { 
if (i<directories.size()-1) { 
direStringstring+=directories.get(i).getID()+"-"+directories.get(i).getDirectoryName()+"+"; 
} 
else { 
direStringstring+=directories.get(i).getID()+"-"+directories.get(i).getDirectoryName(); 
} 
} 
for (int i = 0; i < selectlinkMans.size(); i++) { 
if (i<selectlinkMans.size()-1) { 
linkString+=selectlinkMans.get(i).getDirectory().getID()+"-"+selectlinkMans.get(i).getName()+"-"+selectlinkMans.get(i).getPhoneNum()+"+"; 
} 
else { 
linkString+=selectlinkMans.get(i).getDirectory().getID()+"-"+selectlinkMans.get(i).getName()+"-"+selectlinkMans.get(i).getPhoneNum(); 
} 
} 
ActionContext.getContext().getSession().put("directories", direStringstring); 
ActionContext.getContext().getSession().put("allLinkMans", linkString); 
} catch (Exception e) { 
e.printStackTrace(); 
} 
return SUCCESS; 
}

我是用s2sh款家的，所以数据存放到session中方式是
ActionContext.getContext().getSession().put(key, value)
然后页面得到数据：

<script type="text/javascript"> 
var linkmans= []; 
var dires = []; 
//linkmans = "${directories}".replace('[','').replace(']','').split(','); 
linkmans="${allLinkMans}".split(','); 
dires = "${directories}".split(','); 
treeload(linkmans[0],dires[0]); 
</script>

treeload 是我自己编写的一个js文件内的方法。
js：

Codefunction treeload(linkmans , dires){ 
var linklist= String2linklist(linkmans); 
var direslist = String2direlist(dires); 
d = new dTree('d','./'); 
d.config.checkbox=true;//显示checkbox 
d.config.objValueId='phoneNums'; 
d.icon.root='images/hr/home.png', 
d.icon.folder='images/hr/group.gif', 
d.icon.folderOpen='images/hr/group.gif', 
d.icon.node='images/hr/nan.gif', 
d.add(0,-1,'联系人',null); 
var int = 0; 
var direids = new Array(); 
var direpid= new Array(); 
for ( int; int < direslist.length; int++) { 
d.add(int+1,0,direslist[int].name,false); 
direids.push(direslist[int].id); 
direpid.push(int+1); 
} 
d.add(int+1,0,'全部联系人',false); 
direpid.push(int+1); 
for ( var int2 = 0; int2 < linklist.length; int2++) { 
for ( var int3 = 0; int3 < direpid.length-1; int3++) { 
if(linklist[int2].did==direids[int3]) 
{ 
int++; 
d.add(int+1,direpid[int3],linklist[int2].name,false,linklist[int2].phone); 
} 
} 
} 
for ( var int4 = 0; int4 < linklist.length; int4++) { 
int++; 
d.add(int+1,direpid[direpid.length-1],linklist[int4].name,false,linklist[int4].phone); 
} document.write(d); 
} 
function String2linklist(linkmans){ 
var linkarray = new Array(); 
var a = linkmans.split('+'); 
// alert(a[0]); 
for ( var int = 0; int < a.length; int++) { 
var b = a[int].split('-'); 
// alert(b[2]); 
linkarray.push(new linkman(b[0],b[1],b[2])); 
} 
return linkarray; 
} 
function String2direlist(dires){ 
var direlist = new Array(); 
var a = dires.split('+'); 
for ( var int = 0; int < a.length; int++) { 
var b = a[int].split('-'); 
// alert(b[1]); 
direlist.push(new dire(b[0],b[1])); 
} 
return direlist; 
} 
function linkman(Did,name,phone){ 
this.did = Did; 
this.name = name ; 
this.phone=phone; 
} 
function dire(id ,name){ 
this.id= id; 
this.name = name; 
}

最后，效果图

                              

我改写的dtree 的js：

// Node object 
function Node(id, pid, name, checked, value, icon ,url, title, target, iconOpen, open) { 
this.id = id; 
this.pid = pid; 
this.name = name; 
//是否在该节点添加复选框并设置选中状态，true:选中，false:不选中，null:不添加 
this.checked = checked==null?null:(checked || false); this.value = value;//增加value属性，选中复选框，输入框内得到的就是这个value值 
this.url = url; 
this.title = title; 
this.target = target; 
this.icon = icon; 
this.iconOpen = iconOpen; 
this._io = open || false; 
this._is = false; 
this._ls = false; 
this._hc = false; 
this._ai = 0; 
this._p; 
}; 
// Tree object 
function dTree(objName, path) { 
//路径 
this.path = path ||''; 
//加载css文件 
this.loadCssFile(this.path+'dtree.css'); 
this.config = { 
target : null, 
folderLinks : true, 
useSelection : true, 
useCookies : true, 
useLines : true, 
useIcons : true, 
useStatusText : false, 
closeSameLevel : false, 
inOrder : false, 
//是否显示复选框，true显示，false不显示 
checkbox:false, 
objValueId:'' 
} 
this.icon = { 
root : this.path + 'images/img/base.gif', 
folder : this.path + 'images/img/folder.gif', 
folderOpen : this.path + 'images/img/folderopen.gif', 
node : this.path + 'images/img/page.gif', 
empty : this.path + 'images/img/empty.gif', 
line : this.path + 'images/img/line.gif', 
join : this.path + 'images/img/join.gif', 
joinBottom : this.path + 'images/img/joinbottom.gif', 
plus : this.path + 'images/img/plus.gif', 
plusBottom : this.path + 'images/img/plusbottom.gif', 
minus : this.path + 'images/img/minus.gif', 
minusBottom : this.path + 'images/img/minusbottom.gif', 
nlPlus : this.path + 'images/img/nolines_plus.gif', 
nlMinus : this.path + 'images/img/nolines_minus.gif' 
}; 
this.obj = objName; 
this.aNodes = []; 
this.aIndent = []; 
this.root = new Node(-1); 
this.selectedNode = null; 
this.selectedFound = false; 
this.completed = false; 
}; 
//设置选中节点 
dTree.prototype.checkedNodes=function(){ 
if(this.config.objValueId==''){ 
return; 
} 
var val=document.getElementById(this.config.objValueId).value; 
if(val==''){ 
return; 
} 
val=val.split(','); 
var o=null; 
for(var i=0;i<val.length;i++){ 
o=document.getElementById('cbx_'+this.obj+val[i]); 
if(o){ 
o.checked=true; 
} 
} 
}; 
//实现输入框内自动输入选中项的value值 
dTree.prototype.update=function(){ 
if(this.config.objValueId==''){ 
return; 
} 
var cbx=null,v=[]; 
// v.push(aa); 
var ns=this.aNodes; 
for(var i=0;i<ns.length;i++){ 
cbx=document.getElementById('cbx_'+this.obj+ns[i].id); 
if(cbx){ 
if(cbx.checked){ 
if(ns[i].pid!='0'){ 
v.push(cbx.value);//原先是得到节点的id的，换成value，可以实现选中联系人，得到号码。 
} 
} 
} 
} 
document.getElementById(this.config.objValueId).value=v.join(); 
}; 
//加载css文件 
dTree.prototype.loadCssFile=function (file) { 
try{ 
var head=document.getElementsByTagName("head")[0]; 
var links=head.getElementsByTagName('link'); 
var i=0; 
for(var i=0;i<links.length;i++){ 
if(links[i].getAttribute('href').toLowerCase().indexOf(file.toLowerCase())>-1){ 
return; 
} 
} 
var f = document.createElement("link"); 
f.setAttribute("rel", "stylesheet"); 
f.setAttribute("type", "text/css"); 
f.setAttribute("href", file); 
head.appendChild(f); 
}catch(ex){ 
alert('加载css文件出错：'+ex.message); 
} 
}; 
// Adds a new node to the node array 
dTree.prototype.add = function(id, pid, name, checked, value,icon,url, title, target,iconOpen, open) { 
this.aNodes[this.aNodes.length] = new Node(id, pid, name, checked, value,icon,url, title, target, iconOpen, open); 
}; 
// Open/close all nodes 
dTree.prototype.openAll = function() { 
this.oAll(true); 
}; 
dTree.prototype.closeAll = function() { 
this.oAll(false); 
}; 
// Outputs the tree to the page 
dTree.prototype.toString = function() { 
var str = '<div class="dtree" id="dTree_'+this.obj+'">\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 
dTree.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 
dTree.prototype.node = function(node, nodeId) { 
var str = '<div class="dTreeNode">' + this.indent(node, nodeId); 
if (this.config.useIcons) { 
if (!node.icon) node.icon = (this.root.id == node.pid) ? this.icon.root : ((node.pid==0) ? this.icon.folder : this.icon.node); 
//node.pid==0 这个条件是我自己改的，如果群组内无人的话，还是用群组的icon，而不是联系人的icon，大家可以自己试试的 
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) + '" alt="" />'; 
} 
/***添加checkbox显示***/ 
if(this.config.checkbox&&node.checked!=null){ 
str += '<input '+ (node.checked?'checked=\"checked\"':'') +' onclick=\"javascript: ' + this.obj + (node._hc &&node.pid != this.root.id?'.o(' + nodeId + ')':'.update()')+';\" type=\"checkbox\" value=\"'+node.value+'\" name=\"cbx_'+this.obj+'\" id=\"cbx_'+ this.obj + nodeId+'\" title=\"'+node.name+'\"\/>'; 
} 
if (node.url) { 
str += '<a id="s' + this.obj + nodeId + '" class="' + ((this.config.useSelection) ? ((node._is ? 'nodeSel' : 'node')) : 'node') + '" href="' + node.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 + ');" class="node">'; 
str += node.name; 
if (node.url || ((!this.config.folderLinks || !node.url) && node._hc)) str += '</a>'; 
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') + ';">'; 
str += this.addNode(node); 
str += '</div>'; 
} 
this.aIndent.pop(); 
return str; 
}; 
// Adds the empty and line icons 
dTree.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 ) + '" alt="" />'; 
(node._ls) ? this.aIndent.push(0) : this.aIndent.push(1); 
if (node._hc) { 
str += '<a 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 += '" alt="" /></a>'; 
} else str += '<img 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 
dTree.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 
dTree.prototype.getSelected = function() { 
var sn = this.getCookie('cs' + this.obj); 
return (sn) ? sn : null; 
}; 
// Highlights the selected node 
dTree.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 
dTree.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(); 
//更新选中值if(this.config.objValueId!='') 
this.update(); 
}; 
// Open or close all nodes 
dTree.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 
dTree.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 
dTree.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 
dTree.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) 
dTree.prototype.nodeStatus = function(status, id, bottom) { 
try{ 
eDiv = document.getElementById('d' + this.obj + id); 
eJoin = document.getElementById('j' + this.obj + id); 
//****选择 
if(this.config.checkbox){ 
cbx = document.getElementById('cbx_' + this.obj + id); 
cbx.checked=status; 
cbxChild= eDiv.getElementsByTagName('input'); 
for(var i=0 ;i<cbxChild.length;i++){ 
cbxChild[i].checked=status; 
} 
} 
//****选择 
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'; 
}catch(ex){ 
} 
}; 
// [Cookie] Clears a cookie 
dTree.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 
dTree.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 
dTree.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 
dTree.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].value; 
} 
} 
this.setCookie('co' + this.obj, str); 
}; 
// [Cookie] Checks if a node id is in a cookie 
dTree.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; 
} 
};

大家可以借鉴一下，自己弄个小工程试试，dtree还是不错的。