给你个例子
jsp页面代码
<%
if (treelength < 1) {
out.println ("No Merc_type in Database, Create tree Failed!");
}
else {
%>
<script type="text/javascript">
var tree = new tree();
var root = new root(00,"root","#","");
tree.addRoot(root);
<%
for (int i = 0; i < treelength; i++) {
if (VEND_POINT.elementAt(i).toString().equals("1")) {
treeType = "file";
}
else {
treeType = "folder";
}
%> tree.addNode(new node(<%=VTYPE_NO_INT.elementAt(i)%>, "<%=VTYPE_NAME.elementAt(i)%>", '<%=VUP_TYPE_NO.elementAt(i)%>', "<%=treeType%>", "#", "_self"));
<%}%>
tree.drawRoot();
tree.drawNodes(tree.root);
<%}%>
jsp页面代码
<%
if (treelength < 1) {
out.println ("No Merc_type in Database, Create tree Failed!");
}
else {
%>
<script type="text/javascript">
var tree = new tree();
var root = new root(00,"root","#","");
tree.addRoot(root);
<%
for (int i = 0; i < treelength; i++) {
if (VEND_POINT.elementAt(i).toString().equals("1")) {
treeType = "file";
}
else {
treeType = "folder";
}
%> tree.addNode(new node(<%=VTYPE_NO_INT.elementAt(i)%>, "<%=VTYPE_NAME.elementAt(i)%>", '<%=VUP_TYPE_NO.elementAt(i)%>', "<%=treeType%>", "#", "_self"));
<%}%>
tree.drawRoot();
tree.drawNodes(tree.root);
<%}%>
还有我从数据库中读出的结果集是放到vector()里面的。
javascript能不能写上数据库语句呢？
/**
* 目录树
* @author
* Name: browncoder
* E_mail: [email protected]
* @version 1.0
*///~~/**
* 使用方法：
1.生成一个新的树对象 var tree = new tree();
2.生成一个新的根对象 var root = new root(1,"根目录","#","");
3.为树对象添加根对象 tree.addRoot(root);
4.为树对象添加节点,节点的顺序应该按id先后来排列
5.画出根对象 tree.drawRoot();
6.画出整个树 tree.drawNodes(tree.root);
例子:
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
<script src="FKtree.js"></script>
</HEAD> <BODY>
<script type="text/javascript">
var tree = new tree();
var root = new root(1,"根目录","#","");
tree.addRoot(root);
tree.addNode(new node(2,"第一层目录a",1,"folder","#",""));
tree.addNode(new node(4,"第二层目录***",2,"folder","#",""));
tree.addNode(new node(6,"第三层目录",4,"folder","#",""));
tree.addNode(new node(7,"第一层目录b",1,"folder","#",""));
tree.addNode(new node(8,"第一层目录c",1,"folder","#",""));
tree.addNode(new node(9,"第二层目录a",8,"folder","#",""));
tree.addNode(new node(10,"第三层文件",9,"file","#",""));
tree.addNode(new node(11,"第四层文件",6,"file","#",""));
tree.addNode(new node(12,"第三层目录",4,"folder","#",""));
tree.addNode(new node(13,"第二层文件",9,"file","#",""));
tree.addNode(new node(14,"第三层文件",7,"file","#",""));
tree.addNode(new node(15,"第三层文件",8,"file","#",""));
tree.addNode(new node(16,"第三层文件",4,"file","#",""));
tree.addNode(new node(17,"第三层文件",2,"file","#",""));
tree.addNode(new node(18,"第三层文件",1,"file","#",""));
tree.addNode(new node(19,"第三层文件",9,"file","#",""));
tree.drawRoot();
tree.drawNodes(tree.root);
</script>
</BODY>
</HTML>/*******************************************设置公共的图片变量开始**************************************************//** 图片所在目录 *///~~
imageDir = "images";
/** 文件节点的图片 *///~~
img_file = imageDir+"/file.gif";
/** 关闭的目录的图片 *///~~
img_folder_close = imageDir+"/close.gif";
/** 在中间的加号的图片 *///~~
img_plus = imageDir+"/plusnode.gif";
/** 在树末尾的加号的图片 *///~~
img_plus_last = imageDir+"/pluslastnode.gif";
/** 打开的目录的图片 *///~~
img_folder_open = imageDir+"/open.gif";
/** 在树末尾的减号的图片 *///~~
img_minus_last = imageDir+"/minuslastnode.gif";
/** 在中间的减号的图片 *///~~
img_minus = imageDir+"/minusnode.gif";
/** 无节点线条的图片 *///~~
img_line = imageDir+"/line.gif";
/** 最后节点的线条图片 *///~~
img_line_last = imageDir+"/lastnode.gif";
/** 中间节点的线条图片 *///~~
img_line_mid = imageDir+"/node.gif";
/** 空白区域的图片 *///~~
img_blank = imageDir+"/blank.gif";
/*******************************************设置公共的图片变量结束**************************************************/function tree() {/** 根节点 *///~~
this.root = null;
/** 节点个数 *///~~
this.length = 0;
/** 节点数组 *///~~
this.nodes = new Array();
/** 在drawFrontLine时用来临时存储字符串 *///~~
// this.tempStr = "";/** 添加根节点 *///~~
this.addRoot = addRoot;
/** 添加节点 *///~~
this.addNode = addNode;/** 画出根节点 *///~~
this.drawRoot = drawRoot;
/** 画出节点前的空白图片或连接线图片 *///~~
this.drawFrontLine = drawFrontLine;
/** 画出节点 *///~~
this.drawNode = drawNode;
/** 画出所有节点 *///~~
this.drawNodes = drawNodes;
/** 得到节点的父节点 *///~~
this.getParent = getParent;
/** 添加节点时，将同一层的其他节点的isLast属性设置为false *///~~
this.setOtherIsLast = setOtherIsLast;
}/**
* 根节点对象
* @param id 根节点的id号
* @param name 根节点名称,显示在页面的连接的名字
* @param url 链接
* @param target 指示链接的目标页面
*/
function root(id,name,url,target) {
this.id = id;
this.name = name;
this.parentId = null;
this.type = "root";
this.url = url;
this.target = target;
}function addRoot(root) {
this.root = root;
this.length = 1;
this.nodes[0] = root;
}/**
* 节点对象
* @param id 节点id号
* @param name 节点名称,显示在页面上的链接的名字
* @param parentId 父节点id号
* @param type 节点的类型(folder|file)
* @param url 节点的链接
* @param target 节点链接的目标页面
*///~~function node(id,name,parentId,type,url,target) {
/** 节点id号 *///~~
this.id = id;
/** 节点名称,显示在页面上的链接的名字 *///~~
this.name =name;
/** 父节点id号 *///~~
this.parentId = parentId;
/** 节点的类型(folder|file) *///~~
this.type = type;
/** 节点的链接 *///~~
this.url = url;
/** 节点链接的目标页面 *///~~
this.target = target;
/** 节点的图片(目录或文件等) *///~~
this.image = "";
/** 节点的前导图片(加号或减号或线条等) *///~~
this.fImage = "";
/** 是否是同层中最后节点 *///~~
this.isLast = false;
}
/** 判断一个节点是否有父节点，如果有则返回其父节点，如果没有返回null */
function getParent(node) {
for (var i=0;i<this.length;i++)
{
if (this.nodes[i].id == node.parentId)
{
return this.nodes[i];
}
}
return null;
}/** 当添加一个新节点后，将与它处在同一层的其它元素的isLast标志设置为false */
function setOtherIsLast(node) {
for (var i=1;i<this.length;i++) //i=1,表示不包括根节点在内的循环
{
if (this.nodes[i].parentId == node.parentId && this.nodes[i].isLast) //如果找到父节点相同的，并且isLast为true的节点
{
this.nodes[i].isLast = false; //设置该节点的isLast为false
if (this.nodes[i].type == "folder") //设置图片为非末节点图片
{
this.nodes[i].fImage = img_plus;
} else {
this.nodes[i].fImage = img_line_mid;
}
return true;
}
}
return false;
}/** 为树的节点组nodes[]添加一个新的节点 */
function addNode(node) {
if (this.getParent(node) != null) //如果有父节点
{
this.setOtherIsLast(node); //设置同层中的其他元素为非末节点
node.isLast = true; //设置本节点为末节点
if (node.type == "folder") //根据节点类型设置图片
{
node.image = img_folder_close;
node.fImage = img_plus_last;
} else {
node.image = img_file;
node.fImage = img_line_last;
}
this.nodes[this.length] = node; //添加该节点到树的节点组nodes[]
this.length++; //节点数加1
} else {
alert("没有找到该节点的父节点，这是一个非法节点!");
}
}
/** 画出根节点 */
function drawRoot() {
document.write("<table border='0' cellspacing='0' cellpadding='0'>");
document.write("<tr style='font-size:12px'><td>");
document.write("<a onFocus='this.blur()' onclick="+this.root.url+" target='"+this.root.target+"'><img border='0' src='"+img_folder_close+"'></a>");
document.write("</td><td valign='middle'>");
document.write("<a onFocus='this.blur()' onclick="+this.root.url+" target='"+this.root.target+"'>"+this.root.name+"</a>");
document.write("</td></tr>");
document.write("</table>");
}/** 画出节点 */
function drawNode(node) {
document.write("<table border='0' cellspacing='0' cellpadding='0'>");
document.write("<tr style='font-size:12px'><td>");
this.drawFrontLine(node);
if (node.type == "folder")
{
document.write("<a onClick='clickOnFolder()' onFocus='this.blur()' href='#'><img border='0' src='"+node.fImage+"'></a>");
document.write("<a onFocus='this.blur()' onclick="+node.url+" target='"+node.target+"'><img border='0' src='"+node.image+"'></a>");
document.write("</td><td valign='middle'>");
document.write("<a onFocus='this.blur()' id='folderLink' onclick="+node.url+" target='"+node.target+"'>"+node.name+"</a>");
} else {
document.write("<img border='0' src='"+node.fImage+"'>");
document.write("<a onFocus='this.blur()' onclick="+node.url+" target='"+node.target+"'><img border='0' src='"+node.image+"'></a>");
document.write("</td><td valign='middle'>");
document.write("<a onFocus='this.blur()' onclick="+node.url+" target='"+node.target+"'>"+node.name+"</a>");
}
document.write("</td></tr>");
document.write("</table>");
}/** 画出整个树的节点组 */
function drawNodes(node) {
if (node.type != "root")
{
document.write("<div style='display:none'>");
}
for (var i=1;i<this.length;i++)
{
if (this.nodes[i].parentId!=null && this.nodes[i].parentId == node.id)//如果某结点有父结点，且正好是要画的结点
{
this.drawNode(this.nodes[i]); //画出节点
this.drawNodes(this.nodes[i]); //递归画出整个节点组的节点
}
}
if (node.type != "root")
{
document.write("</div>");
}
}/** 画出节点前的前导图片,有空格或线条图片.
如果其父节点是一个末节点，那么该对应列的前导图片为空格图片.
如果不是末节点,应该添加线条图片.
这里进行了递归运算,但由于其图片顺序为反顺序,所以设置一个tempStr来暂存需要画出的图片,
用以保证其图片顺序为正确顺序. */
function drawFrontLine(node) {
var tempStr = "";
for (var i=1;i<this.length;i++)
{
if (this.nodes[i].id == node.parentId)
{
if (this.nodes[i].isLast)
{
tempStr = "<img src='"+img_blank+"'>" + tempStr;;
} else {
tempStr = "<img src='"+img_line+"'>" + tempStr;
}
this.drawFrontLine(this.nodes[i]);
}
}
document.write(tempStr);
}
/** 当点击目录节点的前导"加号|减号"图片时，展开层或收缩层，并用相应的图片替代现有图片，实现动态收缩动作 */
function clickOnFolder() {
var srcIndex = event.srcElement.sourceIndex;
var divElement = document.all[srcIndex+5]; //得到层对象
var imgElement = document.all[srcIndex+2]; //得到图片对象
var fimgElement = document.all[srcIndex]; //得到前导图片对象(即它本身)
if (divElement.style.display == "none")
{
divElement.style.display = "";
imgElement.src=img_folder_open;;
if (fimgElement.src!=null && fimgElement.src.indexOf(img_plus)!=-1)
{
fimgElement.src=img_minus;
} else {
fimgElement.src=img_minus_last;
}
} else {
divElement.style.display = "none";
imgElement.src=img_folder_close;
if (fimgElement.src!=null && fimgElement.src.indexOf(img_minus)!=-1)
{
fimgElement.src=img_plus;;
} else {
fimgElement.src=img_plus_last;
}
}
}function addtoform(tmp)
{
parent.mainFrame.document.forms[0].input.value=tmp;
}
例如：oracle数据库的字段是id,parentid,nodename.
我要显示出结果集在节点上，
我用的是jsp页面把数据库结果已经读出来了就是不知道怎么把他显示在节点上,请你指教.