richfaces tree 例子

package com.thd.faces; import org.richfaces.component.UITree; import org.richfaces.event.NodeSelectedEvent; import org.richfaces.model.TreeNode; import org.richfaces.model.TreeNodeImpl; import com.thd.dao.NodeDao; import com.thd.pojo.Node; public class TreeFaces { private NodeDao nodeDao; private TreeNode rootNode = null; private String nodeTitle; public void processSelection(NodeSelectedEvent event) { UITree tree = (UITree) event.getComponent(); Node node = (Node) tree.getRowData(); nodeTitle = node.getTit(); } public void addNodes(String nodeCode,TreeNode node){ boolean end = false; int counter = 1; while(!end){ String code = nodeCode != null ? nodeCode + "." + counter : String.valueOf(counter); Node nodes = nodeDao.query(code); if(nodes!=null){ System.out.println(code); TreeNodeImpl nodeImpl = new TreeNodeImpl(); nodeImpl.setData(nodes); node.addChild(new Integer(counter), nodeImpl); addNodes(code,nodeImpl); counter++; }else{ end = true; } } } public void loadTree(){ rootNode = new TreeNodeImpl(); addNodes(null, rootNode); } public TreeNode getRootNode() { if(rootNode == null){ loadTree(); } return rootNode; } public NodeDao getNodeDao() { return nodeDao; } public void setNodeDao(NodeDao nodeDao) { this.nodeDao = nodeDao; } public String getNodeTitle() { return nodeTitle; } public void setNodeTitle(String nodeTitle) { this.nodeTitle = nodeTitle; } }