treeviewrender.java

动态树状菜单

package book.treeview;


public class treeviewRender {
	
	static public String renderTreeViewAjax(TreeviewElement treeElmt,boolean bRenderChildren) {
		StringBuffer content = new StringBuffer();
		content.append("<li id="+treeElmt.getID()+">");
	    if (treeElmt.canExpand()){
			content.append("<img src=images/plus.gif onClick=\"getSubTree('"+treeElmt.getID()+"')\">");
	    }
		else{
			content.append("<img src=images/blank.gif>");
		}
		content.append("<img src=images/folder.gif><a href=\"#\"");
		if (treeElmt.canExpand())
		  content.append(" onClick=\"getSubTree('"+treeElmt.getID()+"')\"");
		content.append(">"+treeElmt.getNodeName()+"</a>");
		
		if ( bRenderChildren&&treeElmt.canExpand( ))
		{
			content.append("<ul>");
				TreeviewElement[] elmts = treeElmt.getChildren();
				for (int i=0;i<elmts.length;i++){
					content.append(renderTreeViewAjax(elmts[i],false));
				}
			content.append("</ul>");
		}
		
		content.append("</li>");
		return content.toString();
	}
}