这两天发现了dtree,做的很不错,想和大家交流一下
下载地址:
http://www.destroydrop.com/javascripts/tree/dtree.zip
或从附件里下载
看看里面的example01.html例子。
在这个基础上我做了一个动态的树型结构数据的展现(其实就是动态生成js代码而已)。
java类代码
- import java.io.Serializable;
- public class TreeNode implements Serializable{
- private String id ;
- private String pid ;
- private String name ;
- private String url ;
- private String title ;
- private String target ;
- private String icon ;
- private String iconOpen ;
- private String open ;
-
-
- public TreeNode(){
- id = "" ;
- pid = "" ;
- name = "" ;
- url = "" ;
- title = "" ;
- target = "" ;
- icon = "" ;
- iconOpen = "" ;
- open = "" ;
- }
-
import java.io.Serializable;
public class TreeNode implements Serializable{
private String id ; //节点编号
private String pid ; //父节点编号
private String name ; //节点名称
private String url ; //链接地址
private String title ; //节点描述
private String target ; //Target
private String icon ; //图标路径
private String iconOpen ; //展开状态下的图标路径
private String open ; //是否展开
//构造函数
public TreeNode(){
id = "" ;
pid = "" ;
name = "" ;
url = "" ;
title = "" ;
target = "" ;
icon = "" ;
iconOpen = "" ;
open = "" ;
}
//------get set functions
- public class TreeNodeUtil {
-
- public static String createJsArray(TreeNode[] tn , String dtree) {
- if(tn == null || tn.length == 0 ){
- System.out.println("TreeNode is empty");
- return "";
- }
- StringBuffer contents = new StringBuffer(100);
- contents.append("new dTree('"+dtree+"');");
- for (int i = 0; i < tn.length; i++) {
- contents.append("\n");
- contents.append(dtree+".add('");
- contents.append(tn[i].getId());
- contents.append("','");
- contents.append(tn[i].getPid());
- contents.append("','");
- contents.append(tn[i].getName());
- contents.append("','");
- contents.append(tn[i].getUrl());
- contents.append("','");
- contents.append(tn[i].getTitle());
- contents.append("','");
- contents.append(tn[i].getTarget());
- contents.append("','");
- contents.append(tn[i].getIcon());
- contents.append("','");
- contents.append(tn[i].getIconOpen());
- contents.append("','");
- contents.append(tn[i].getOpen());
- contents.append("');");
- }
- return contents.toString();
- }
- }
public class TreeNodeUtil {
//返回js代码
public static String createJsArray(TreeNode[] tn , String dtree) {
if(tn == null || tn.length == 0 ){
System.out.println("TreeNode is empty");
return "";
}
StringBuffer contents = new StringBuffer(100);
contents.append("new dTree('"+dtree+"');");
for (int i = 0; i < tn.length; i++) {
contents.append("\n");
contents.append(dtree+".add('");
contents.append(tn[i].getId());
contents.append("','");
contents.append(tn[i].getPid());
contents.append("','");
contents.append(tn[i].getName());
contents.append("','");
contents.append(tn[i].getUrl());
contents.append("','");
contents.append(tn[i].getTitle());
contents.append("','");
contents.append(tn[i].getTarget());
contents.append("','");
contents.append(tn[i].getIcon());
contents.append("','");
contents.append(tn[i].getIconOpen());
contents.append("','");
contents.append(tn[i].getOpen());
contents.append("');");
}
return contents.toString();
}
}
根据实际情况生成TreeNode对象
- public void execute() throws EpochalException {
-
- String sql = "";
- String url = "" ;
- sql = "SELECT id,parentId,name,seq ,remark FROM t_testtree ORDER BY seq DESC" ;
- TableData tableData = null;
- TreeNode[] treeNodes = null;
- try{
- tableData = TableSelector.select(sql);
- if(tableData!=null){
- treeNodes = new TreeNode[tableData.getRowCount()] ;
- for(int i = 0; i<tableData.getRowCount();i++){
- treeNodes[i] = new TreeNode();
- treeNodes[i].setId(tableData.getString(i,"id"));
- treeNodes[i].setName(tableData.getString(i,"name"));
- treeNodes[i].setPid(tableData.getString(i,"parentId"));
-
- url = "programList.x?category="+tableData.getString(i,"name") ;
- treeNodes[i].setUrl(url);
- treeNodes[i].setTitle(tableData.getString(i,"remark"));
- treeNodes[i].setTarget("_blank");
- }
- dataBean.setParameter("treeNodeArray",treeNodes) ;
- }
- }catch(Exception e){
- System.out.println(e.toString());
- }
- }
public void execute() throws EpochalException {
// TODO Auto-generated method stub
String sql = "";
String url = "" ;
sql = "SELECT id,parentId,name,seq ,remark FROM t_testtree ORDER BY seq DESC" ;
TableData tableData = null;
TreeNode[] treeNodes = null;
try{
tableData = TableSelector.select(sql);
if(tableData!=null){
treeNodes = new TreeNode[tableData.getRowCount()] ;
for(int i = 0; i<tableData.getRowCount();i++){
treeNodes[i] = new TreeNode();
treeNodes[i].setId(tableData.getString(i,"id"));
treeNodes[i].setName(tableData.getString(i,"name"));
treeNodes[i].setPid(tableData.getString(i,"parentId"));
//根据实际情况生成连接地址
url = "programList.x?category="+tableData.getString(i,"name") ;
treeNodes[i].setUrl(url);
treeNodes[i].setTitle(tableData.getString(i,"remark"));
treeNodes[i].setTarget("_blank");//打开新窗口
}
dataBean.setParameter("treeNodeArray",treeNodes) ;
}
}catch(Exception e){
System.out.println(e.toString());
}
}
jsp这边取"treeNodeArray"后通过TreeNodeUtil类生成js代码
- <%
- TreeNode[] treeNodes = (TreeNode[])dataBean.getParameterObject("treeNodeArray") ;
- %>
- <p><a href="javascript: d.openAll();">全部展开</a> | <a href="javascript: d.closeAll();">全部关闭</a></p>
- <script language="javascript">
- d = <%=TreeNodeUtil.createJsArray(treeNodes,"d")%>
- document.write(d);
- </script>
<%
TreeNode[] treeNodes = (TreeNode[])dataBean.getParameterObject("treeNodeArray") ;
%>
<p><a href="javascript: d.openAll();">全部展开</a> | <a href="javascript: d.closeAll();">全部关闭</a></p>
<script language="javascript">
d = <%=TreeNodeUtil.createJsArray(treeNodes,"d")%>
document.write(d);
</script>
客户端生成的js代码
- <script language="javascript">
- d = new dTree('d');
- d.add('1','-1','栏目','programList.x?category=栏目','','_blank','','','');
- d.add('2','1','电影','programList.x?category=电影','','_blank','','','');
- d.add('3','1','电视剧','programList.x?category=电视剧','','_blank','','','');
- d.add('4','1','专题','programList.x?category=专题','','_blank','','','');
- d.add('5','1','远程教育','programList.x?category=远程教育','','_blank','','','');
- d.add('6','1','期刊','programList.x?category=期刊','','_blank','','','');
- d.add('7','2','动作片','programList.x?category=动作片','','_blank','','','');
- d.add('8','2','喜剧片','programList.x?category=喜剧片','','_blank','','','');
- d.add('9','2','鬼片','programList.x?category=鬼片','','_blank','','','');
- d.add('10','3','韩剧','programList.x?category=韩剧','','_blank','','','');
- d.add('11','3','古装剧','programList.x?category=古装剧','','_blank','','','');
- d.add('12','5','英语沙龙','programList.x?category=英语沙龙','','_blank','','','');
- d.add('13','4','热门推荐','programList.x?category=热门推荐','','_blank','','','');
- d.add('14','7','港台片','programList.x?category=港台片','','_blank','','','');
- d.add('15','7','欧美片','programList.x?category=欧美片','','_blank','','','');
- d.add('16','14','成龙全集','programList.x?category=成龙全集','','_blank','','','');
- d.add('17','14','李连杰全集','programList.x?category=李连杰全集','','_blank','','','');
- document.write(d);
- </script>
<script language="javascript">
d = new dTree('d');
d.add('1','-1','栏目','programList.x?category=栏目','','_blank','','','');
d.add('2','1','电影','programList.x?category=电影','','_blank','','','');
d.add('3','1','电视剧','programList.x?category=电视剧','','_blank','','','');
d.add('4','1','专题','programList.x?category=专题','','_blank','','','');
d.add('5','1','远程教育','programList.x?category=远程教育','','_blank','','','');
d.add('6','1','期刊','programList.x?category=期刊','','_blank','','','');
d.add('7','2','动作片','programList.x?category=动作片','','_blank','','','');
d.add('8','2','喜剧片','programList.x?category=喜剧片','','_blank','','','');
d.add('9','2','鬼片','programList.x?category=鬼片','','_blank','','','');
d.add('10','3','韩剧','programList.x?category=韩剧','','_blank','','','');
d.add('11','3','古装剧','programList.x?category=古装剧','','_blank','','','');
d.add('12','5','英语沙龙','programList.x?category=英语沙龙','','_blank','','','');
d.add('13','4','热门推荐','programList.x?category=热门推荐','','_blank','','','');
d.add('14','7','港台片','programList.x?category=港台片','','_blank','','','');
d.add('15','7','欧美片','programList.x?category=欧美片','','_blank','','','');
d.add('16','14','成龙全集','programList.x?category=成龙全集','','_blank','','','');
d.add('17','14','李连杰全集','programList.x?category=李连杰全集','','_blank','','','');
document.write(d);
</script>
感觉使用很方便,数据量不是很大(一般的树型结构的数据量不会很大的,数据量大了就不直观了)的情况下能够满足大多数人的需要。
注意的是root节点的pid必须为'-1'