zk生成多级树

view代码
 

<zk>
<window id="win" border="normal" contentStyle="padding:0px" apply="account.DengJiComposer">
   <borderlayout height="600px" width="100%">
       		<west>
				<tree width="200px" height="600px" id="tree"
					 zclass="z-dottree">
					<treecols sizable="true">
						<treecol label="项目列表">
						</treecol>
					</treecols>
				</tree>
			</west>
			<center>
				<include id="include"></include>
			</center>
		</borderlayout>
</window>
</zk>

后台类

 package account;

import org.zkoss.zk.ui.Component;
import org.zkoss.zk.ui.util.GenericForwardComposer;
import org.zkoss.zul.Include;
import org.zkoss.zul.Tree;

public class DengJiComposer extends GenericForwardComposer{
	private Tree tree;
	@SuppressWarnings("unused")
	private Include include;
    public void doAfterCompose(Component comp) throws Exception{
    	super.doAfterCompose(comp);
    	tree.setModel(new MyTreeModel());
    	tree.setTreeitemRenderer(new MyTreeitemRenderer());
    }
}

MyTreeModel类代码

 package account;
   import java.util.ArrayList;
	import java.util.List;

	import account.bean.Item;

	import org.zkoss.zul.TreeModel;
	import org.zkoss.zul.event.TreeDataListener;

	public class MyTreeModel implements TreeModel{
		
		private List<Item>model;
		AccDAO acc = new AccDAO();
		public MyTreeModel(){
			model = acc.findAllxm();
		}
		@Override
		public void addTreeDataListener(TreeDataListener l) {
			// TODO Auto-generated method stub
			
		}
		@Override
		public Object getChild(Object parent, int index) {
			// TODO Auto-generated method stub
			if(parent instanceof List)
				return ((List)parent).get(index);
			else if(parent instanceof Item){
			List<Item> xmList = acc.getXmChild((Item)parent);
			return xmList.get(index);
			}
			else
				return null;
		}
		@Override
		public int getChildCount(Object parent) {
			// TODO Auto-generated method stub
			if(parent instanceof List)
				return ((List)parent).size();
			else if(parent instanceof Item)
			return (int)acc.getChildCount((Item)parent);
			else
				return 0;
			
		}

		@Override
		public int[] getPath(Object parent, Object lastNode) {
			// TODO Auto-generated method stub
			return null;
		}

		@Override
		public Object getRoot() {
			// TODO Auto-generated method stub
			List<Item>rootlist = new ArrayList();
			for(Item xm:model){
				if(xm.getParentId()==null)
					rootlist.add(xm);
			}
			return rootlist;
			
		}

		@Override
		public boolean isLeaf(Object node) {
			// TODO Auto-generated method stub
			return acc.checkIsLeaf((Item)node);
		}

		@Override
		public void removeTreeDataListener(TreeDataListener l) {
			// TODO Auto-generated method stub
			
		}
		
}

MyTreeitemRenderer类

 package account;

import account.bean.Item;
import org.zkoss.zk.ui.event.Event;
import org.zkoss.zk.ui.event.EventListener;
import org.zkoss.zk.ui.event.Events;
import org.zkoss.zul.Include;
import org.zkoss.zul.Treeitem;
import org.zkoss.zul.TreeitemRenderer;

public 	class  MyTreeitemRenderer implements TreeitemRenderer{
 
	private boolean addDoubleClick = false;
	public MyTreeitemRenderer(){
		this(true);
	}
	public MyTreeitemRenderer(boolean addDoubleClick){
		this.addDoubleClick = addDoubleClick;
	}
	@Override
	public void render(final Treeitem item, Object data) throws Exception {
		// TODO Auto-generated method stub
		Item ite = (Item)data;
		item.setLabel(ite.getItemname());
		item.setValue(ite);
		if(new AccDAO().checkIsLeaf(ite)){
			item.getTreerow().addEventListener(Events.ON_DOUBLE_CLICK, new EventListener(){
	
				@Override
				public void onEvent(Event event) throws Exception {
					// TODO Auto-generated method stub
					Include include = (Include) item.getFellow("include");
					include.setSrc(null);
					include.setSrc("/dengji.zul");
					include.setDynamicProperty("ite", item.getValue());
				}
				
			});
		}
	}
	
}

DAO相关查询

public List<Item>findAllxm()
	{
		Session sess=HibernateSessionFactory.getSession();
		try{
			return sess.createQuery("from Item").list();
		}catch(Exception e){
			e.printStackTrace();
		}
		finally{
			sess.close();		
			}
		return null;
	}

 public List<Item> getXmChild(Item xm){
		try {
			Session sess = HibernateSessionFactory.getSession();
			String hql = "from Item where parentId=?";
			Query query = sess.createQuery(hql);
			query.setInteger(0, xm.getItemId());
			return query.list();
		} finally{
			HibernateSessionFactory.closeSession();
		}
	}
public long getChildCount(Item xm){

		try {

			Session sess = HibernateSessionFactory.getSession();

			String hql = "select count(id) from Item where parentId=?";

			Query query = sess.createQuery(hql);

			query.setInteger(0, xm.getItemId());

			return ((Long)query.uniqueResult()).longValue();

		} finally{

			HibernateSessionFactory.closeSession();

		}

	}

 public boolean checkIsLeaf(Item xm){
		try {
			Session sess = HibernateSessionFactory.getSession();
			String hql = "select count(id) from Item where parentId=?";
			Query query = sess.createQuery(hql);
			query.setInteger(0, xm.getItemId());
			return ((Long)query.uniqueResult()).longValue()==0;
		} finally{
			HibernateSessionFactory.closeSession();
		}
		
	}

Treeitem treeitem=(Treeitem)event.getOrigin().getTarget();
		 if(treeitem.getTreechildren().getChildren().size()>0){
			 return;
		 }
		    tableLists=tableDAO.getTableName((String) treeitem.getValue());
			for(Iterator iter=tableLists.iterator();iter.hasNext();){
				String name=(String)iter.next();
				final Treeitem item=new Treeitem();
				item.setValue(name);
				item.setLabel(name);
				item.setParent(treeitem.getTreechildren());
				if(tableTree.isCheckmark()){
					item.isCheckable();
				}
				item.addEventListener(Events.ON_DOUBLE_CLICK, new EventListener()
				{
					public void onEvent(Event event) throws Exception {
						
					}
				});
		 }

评论

2 楼 xujun738 2014-08-01  

楼主,为什么我按照你说的做,只生成了一级,点展开树结点的时候就出空指针异常了,求帮助呀

1 楼 javazy 2012-04-05  

楼主有源码吗？ZK的学习资料太少了