yui+dwr实现动态tree

YUI脚本

<script><!--
YAHOO.example.treeExample = function() {

    var tree, currentIconMode;

    function changeIconMode() {
        var newVal = parseInt(this.value);
        if (newVal != currentIconMode) {
            currentIconMode = newVal;
        }
        buildTree();
    }
    
        function loadNodeData(node, fnLoadComplete)  {
         
            var nodeLabel = encodeURI(node.label);
            
            //prepare URL for XHR request:
            var sUrl = "assets/ysuggest_proxy.php?query=" + nodeLabel;
            
            //prepare our callback object
            var callback = {
            
                //if our XHR call is successful, we want to make use
                //of the returned data and create child nodes.
                success: function(oResponse) {
                    YAHOO.log("XHR transaction was successful.", "info", "example");
                    //YAHOO.log(oResponse.responseText);
                    var oResults = eval("(" + oResponse.responseText + ")");
                    if((oResults.ResultSet.Result) && (oResults.ResultSet.Result.length)) {
                        //Result is an array if more than one result, string otherwise
                        if(YAHOO.lang.isArray(oResults.ResultSet.Result)) {
                            for (var i=0, j=oResults.ResultSet.Result.length; i<j; i++) {
                                var tempNode = new YAHOO.widget.TextNode(oResults.ResultSet.Result[i], node, false);
                            }
                        } else {
                            //there is only one result; comes as string:
                            var tempNode = new YAHOO.widget.TextNode(oResults.ResultSet.Result, node, false)
                        }
                    }
  
                    oResponse.argument.fnLoadComplete();
                },
                
                failure: function(oResponse) {
                    YAHOO.log("Failed to process XHR transaction.", "info", "example");
                    oResponse.argument.fnLoadComplete();
                },

                argument: {
                    "node": node,
                    "fnLoadComplete": fnLoadComplete
                },
                
                //timeout -- if more than 7 seconds go by, we'll abort
                //the transaction and assume there are no children:
                timeout: 7000
            };
            YAHOO.util.Connect.asyncRequest('GET', sUrl, callback);
        }

        function buildTree() {
        	
            tree = new YAHOO.widget.TreeView("treeDiv1");
            tree.setDynamicLoad(loadNodeData, currentIconMode);
            var root = tree.getRoot(); 
            var arrRoot=new Array();
            DWREngine.setAsync(false);
            arrRoot=OrganizationService.getRootNodes();
			OrganizationService.getRootNodes(
					function(data){
						arrRoot=data;
			});
			for (var m=0, n=arrRoot.length; m<n; m++) {
				
				var division = new YAHOO.widget.TextNode(arrRoot[m], root, true);
	            var div=encodeURI(division.label);
	            division.href="#";
	            division.expanded=false;
	            division.target="#";
	            
				var aStates=new Array();
				DWREngine.setAsync(false);
				OrganizationService.getChildNodes(arrRoot[m],
						function(data){
							aStates=data;
				});
	            for (var i=0, j=aStates.length; i<j; i++) {
	            	var depNode = new YAHOO.widget.TextNode(aStates[i], division, false);
	            	var department=encodeURI(aStates[i]);
	            	depNode.href="frameUserAction.html?department="+department;
	            	depNode.target="rightFrame";
	            	depNode.isLeaf=true;
	            }
			}
            tree.draw();        
         }
    return {
        init: function() {
            YAHOO.util.Event.on(["mode0", "mode1"], "click", changeIconMode);
            var el = document.getElementById("mode1");
            if (el && el.checked) {
                currentIconMode = parseInt(el.value);
            } else {
                currentIconMode = 0;
            }

            buildTree();
        }

    }
} ();

//once the DOM has loaded, we can go ahead and set up our tree:
YAHOO.util.Event.onDOMReady(YAHOO.example.treeExample.init, YAHOO.example.treeExample,true)

--></script>

 HTML code

<div id="treeDiv1" style="margin-top: 10px"></div>

 dwr.xml配置

<dwr>
    <allow>
        <create creator="new" javascript="validator">
            <param name="class" value="org.apache.struts2.validators.DWRValidator"/>
        </create>
        <convert converter="bean" match="com.opensymphony.xwork2.ValidationAwareSupport"/>
        
        <convert converter="bean" match="com.byd.bqs.model.Organization" javascript="Organization">
            <param name="include" value="division,department" />
        </convert>
        
         <create creator="spring" javascript="OrganizationService">
            <param name="class" value="com.byd.bqs.OrganizationService"/>
            <param name="beanName" value="organizationService"/>
            <include method="getChildNodes"/>
            <include method="getHelloworld"/>
            <include method="getRootNodes"/>
            
         </create>
    </allow>

    <signatures>
        <![CDATA[
        import java.util.Map;
        import org.apache.struts2.validators.DWRValidator;

        DWRValidator.doPost(String, String, Map<String, String>);
        ]]>
    </signatures>
</dwr>