主页面jsp，我把这个页面放到tomcat后运行，tree的checkbox没有显示了，请问下这是为什么，代码帖在下面，附件中有完整可以运行的代码
[code="java"]
<!DOCTYPE HTML PUBLIC "-//W3C/DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%@page contentType="text/html" pageEncoding="UTF-8" %>
[/code]
[code="java"]
Ext.ux.TreeCheckNodeUI = function() {
this.checkModel = 'cascade';
//only leaf can checked
this.onlyLeafCheckable = false;
Ext.ux.TreeCheckNodeUI.superclass.constructor.apply(this, arguments);
};
Ext.extend(Ext.ux.TreeCheckNodeUI, Ext.tree.TreeNodeUI, {
renderElements : function(n, a, targetNode, bulkRender){
var tree = n.getOwnerTree();
this.checkModel = tree.checkModel || this.checkModel;
this.onlyLeafCheckable = tree.onlyLeafCheckable || false;
// add some indent caching, this helps performance when rendering a large tree
this.indentMarkup = n.parentNode ? n.parentNode.ui.getChildIndent() : '';
//debugger;
//var cb = typeof a.checked == 'boolean';
var cb = (!this.onlyLeafCheckable || a.leaf);
var href = a.href ? a.href : Ext.isGecko ? "" : "#";
var buf = ['<li class="x-tree-node"><div ext:tree-node-id="',n.id,'" class="x-tree-node-el x-tree-node-leaf x-unselectable ', a.cls,'" unselectable="on">',
'<span class="x-tree-node-indent">',this.indentMarkup,"</span>",
'<img src="', this.emptyIcon, '" class="x-tree-ec-icon x-tree-elbow" />',
'<img src="', a.icon || this.emptyIcon, '" class="x-tree-node-icon',(a.icon ? " x-tree-node-inline-icon" : ""),(a.iconCls ? " "+a.iconCls : ""),'" unselectable="on" />',
cb ? ('<input class="x-tree-node-cb" type="checkbox" ' + (a.checked ? 'checked="checked" />' : '/>')) : '',
'<a hidefocus="on" class="x-tree-node-anchor" href="',href,'" tabIndex="1" ',
a.hrefTarget ? ' target="'+a.hrefTarget+'"' : "", '><span unselectable="on">',n.text,"</span></a></div>",
'<ul class="x-tree-node-ct" style="display:none;"></ul>',
"</li>"].join('');
var nel;
if(bulkRender !== true && n.nextSibling && (nel = n.nextSibling.ui.getEl())){
this.wrap = Ext.DomHelper.insertHtml("beforeBegin", nel, buf);
}else{
this.wrap = Ext.DomHelper.insertHtml("beforeEnd", targetNode, buf);
}
this.elNode = this.wrap.childNodes[0];
this.ctNode = this.wrap.childNodes[1];
var cs = this.elNode.childNodes;
this.indentNode = cs[0];
this.ecNode = cs[1];
this.iconNode = cs[2];
var index = 3;
if(cb){
this.checkbox = cs[3];
Ext.fly(this.checkbox).on('click', this.check.createDelegate(this,[null]));
index++;
}
this.anchor = cs[index];
this.textNode = cs[index].firstChild;
},
// private
check : function(checked){
//debugger;
var n = this.node;
var tree = n.getOwnerTree();
this.checkModel = tree.checkModel || this.checkModel;
if( checked === null ) {
checked = this.checkbox.checked;
} else {
this.checkbox.checked = checked;
}
n.attributes.checked = checked;
tree.fireEvent('check', n, checked);
if(this.checkModel == 'single'){
var checkedNodes = tree.getChecked();
for(var i=0;i<checkedNodes.length;i++){
var node = checkedNodes[i];
if(node.id != n.id){
node.getUI().checkbox.checked = false;
node.attributes.checked = false;
tree.fireEvent('check', node, false);
}
}
} else if(!this.onlyLeafCheckable){
if(this.checkModel == 'cascade' || this.checkModel == 'parentCascade'){
var parentNode = n.parentNode;
if(parentNode !== null) {
this.parentCheck(parentNode,checked);
}
}
if(this.checkModel == 'cascade' || this.checkModel == 'childCascade'){
if( !n.expanded && !n.childrenRendered ) {
n.expand(false,false,this.childCheck);
}else {
this.childCheck(n);
}
}
}
},
// private
childCheck : function(node){
//debugger;
var a = node.attributes;
if(!a.leaf) {
var cs = node.childNodes;
var csui;
for(var i = 0; i < cs.length; i++) {
csui = cs[i].getUI();
if(csui.checkbox.checked ^ a.checked)
csui.check(a.checked);
}
}
},
// private
parentCheck : function(node ,checked){
//debugger;
var checkbox = node.getUI().checkbox;
//debugger;
if(typeof checkbox == 'undefined')return ;
if(!(checked ^ checkbox.checked))return;
if(!checked && this.childHasChecked(node))return;
checkbox.checked =checked;
node.attributes.checked =checked;
node.getOwnerTree().fireEvent('check', node, checked);
var parentNode = node.parentNode;
if( parentNode !== null){
this.parentCheck(parentNode,checked);
}
},
// private
childHasChecked : function(node){
var childNodes = node.childNodes;
if(childNodes || childNodes.length>0){
for(var i=0;i<childNodes.length;i++){
if(childNodes[i].getUI().checkbox.checked)
return true;
}
}
return false;
},
toggleCheck : function(value){
var cb = this.checkbox;
if(cb){
var checked = (value === undefined ? !cb.checked : value);
this.check(checked);
}
}
});
[/code]
我在tomcat下运行第1个jsp页面，显示的树没有checkbox了？
请问下谁可以看下是什么问题，谢谢！
看样子，你是使用了TreeCheckNodeUI这个扩展的tree组件来实现的checkbox功能。但TreeCheckNodeUI.js是个独立的文件，需要把这个文件放到一个目录下，然后在页面头部引入，如：
放到js引用前面试试