java后台构造树的代码

/**
	 * 复选框树-权限管理
	 * @param pRequest
	 * @param pResponse
	 * @throws Exception
	 */
	public void	showCheckTree(final HttpServletRequest pRequest, final HttpServletResponse pResponse) throws Exception{
		//得到数据
		List orgs =  this.getOrgs();
	
		UserDataUncoder orgUncoder = new OrgUncoder();
		AbstractWebTreeModelCreator treeModelCreator = new AbstractWebTreeModelCreator(){
			protected Node createNode(Object pUserData, UserDataUncoder pUncoder) {
				Org org = (Org)pUserData;
				WebTreeNode result = new WebTreeNode(org.getName(), "org" + org.getId());
				result.setValue(org.getId());
				return result;
			}
		};
		treeModelCreator.init(pRequest);
		
		TreeModel treeModel = treeModelCreator.create(orgs,orgUncoder);
		TreeDirector director = new DefaultTreeDirector();
		director.setComparator(new AbstractNodeComparator(){
			protected Comparable getComparableProperty(Node pNode) {
				Org org = (Org)pNode.getUserData();
				return new Integer( org.getViewOrder() );
			}
			
		});
		
		WebTreeBuilder treeBuilder = new PrvCheckXTreeBuilder();
		
		//PrvCheckXTreeBuilder treeBuilder = new PrvCheckXTreeBuilder();		
		//treeBuilder.setCascadeCheck(true);
	
		treeBuilder.init(pRequest);		
		director.build(treeModel, treeBuilder);		
		String treeScript = treeBuilder.getTreeScript();
		pRequest.setAttribute("treeScript", treeScript);
		pRequest.getRequestDispatcher("/e3/samples/jcom/CheckTree.jsp").forward(pRequest,pResponse);
	}

 

checkTree.jsp显示树

<%= request.getAttribute("treeScript") %>

 

1：得到的结果如下图：

 

2：选择保存

 

得到的节点ID为：100,100100,100100101,100100102

 

3：进入后台将节点ID保存到数据库，代码如下：

//数据进入数据库
DbManager.excute(sql);
//后台重新构造 复选框树

/**
	 * 复选框树-权限管理
	 * @param pRequest
	 * @param pResponse
	 * @throws Exception
	 */
	public void	showCheckTree(final HttpServletRequest pRequest, final HttpServletResponse pResponse) throws Exception{
		//得到数据
		List orgs =  this.getOrgs();
	
		UserDataUncoder orgUncoder = new OrgUncoder();
		AbstractWebTreeModelCreator treeModelCreator = new AbstractWebTreeModelCreator(){
			protected Node createNode(Object pUserData, UserDataUncoder pUncoder) {
				Org org = (Org)pUserData;
				WebTreeNode result = new WebTreeNode(org.getName(), "org" + org.getId());
				result.setValue(org.getId());
				return result;
			}
		};
		treeModelCreator.init(pRequest);
		
		TreeModel treeModel = treeModelCreator.create(orgs,orgUncoder);
		TreeDirector director = new DefaultTreeDirector();
		director.setComparator(new AbstractNodeComparator(){
			protected Comparable getComparableProperty(Node pNode) {
				Org org = (Org)pNode.getUserData();
				return new Integer( org.getViewOrder() );
			}
			
		});
		
		WebTreeBuilder treeBuilder = new PrvCheckXTreeBuilder();
		
		//PrvCheckXTreeBuilder treeBuilder = new PrvCheckXTreeBuilder();		
		//treeBuilder.setCascadeCheck(true);
	
		treeBuilder.init(pRequest);		
		director.build(treeModel, treeBuilder);		
		String treeScript = treeBuilder.getTreeScript();
		pRequest.setAttribute("treeScript", treeScript);
		pRequest.getRequestDispatcher("/e3/samples/jcom/CheckTree.jsp").forward(pRequest,pResponse);
	}

 

4:CheckTree.jsp

//显示树
<%= request.getAttribute("treeScript") %>
//同时用js进行判断
<script type="text/javascript">
<!--
 var root = getTreeRoot();// 获取跟节点
 root.expandAll();//『默认展开』
 
 var children = root.childNodes;  
  for(var i=0; i<children.length; i++){   
    var child = children[i];
    var schild = child.childNodes;
    for(var j=0;j<schild.length;j++){
    	var childs = schild[j];
    	var svu = childs.value;
        	<%  // alt 是ArrayList的对象 保存的是从数据库里取出来的100,100100,100100101,100100102
    		if(alt.size()>0){
    			for(int j=0;j<alt.size();j++){
    				String sg = (String)alt.get(j);
    	%>
    				if(svu=="<%=sg%>"){//如果当前节点ID等于从数据库里取出的节点ID，就把该节点设为选中状态
    					childs.setChecked(true);
    				}
    	<%
    			}
    		}
    	%>
    	
    } 
 }
//-->

 

5：至此，以上本人以为以上流程没有问题

但显示的结果是

 

 

 

但我想要的结果是：

 

至此问题出来了，

我自己也测试过了，当从数据库得到ID等于“权限管理”ID时

用childs.setChecked(true);方法

则下面的4个子节点都默认被选中了

 

辛苦各位,被这困扰好几天了！杨哥.............................

 

兄弟,你搞太复杂了，直接在
protected Node createNode(Object pUserData, UserDataUncoder pUncoder) {  
                Org org = (Org)pUserData;  
                WebTreeNode result = new WebTreeNode(org.getName(), "org" + org.getId());  
                result.setValue(org.getId());  
                return result;  
            }  
        };  
在这里设置
result.setSelected(true);就可以了,(你在着判断一个接点是否该选种.
方法名忘记了，可能是result.setSetChecked(true);

你这问题问的清楚明了

我想兄弟是没明白我问这个问题的目的！
protected Node createNode(Object pUserData, UserDataUncoder pUncoder) {  
                Org org = (Org)pUserData;  
                WebTreeNode result = new WebTreeNode(org.getName(), "org" + org.getId());  
                result.setValue(org.getId());  
                return result;  
            }  
        };  
在此也可以设置！这个我知道！
但还要没有解决我问的问问题

后台用：
result.setSelected(true);
result.setSetChecked(true);
和我在前台用：
childs.setChecked(true);
达到的效果都一样
就是都全部选中了！并没有解决我问的问题！

你确定,毛道理哦,晚上回去测试下

已经测试了，不会存在你说的问题 .

貌似梅花雪Tree的改版吗！！！

谢咯！兄弟搞定了！

我也做这个功能那  但你的例子好深奥  我看不懂   有时间可以和你聊聊嘛  js中怎么得到存在session里的值啊   你的那种方法“<=>”我用过  取不出来 希望给留言 指点迷津  谢谢