Dtree+Jquery动态生成树节点.

1.先来介绍一下. dtree 的用法.(我引用了以前我收集的一篇文章.还比较详细,出处不记得啦).文章下面会附带dtree用法的例子.

         Dtree目录树的总结

                  一：函数

                           1：页面中
                              tree.add(id,pid,name,url,title,target,icon,iconOpen,open);
                                  参数说明：
                                              id         ：节点自身的id
                                              pid       ：节点的父节点的id
                                              name    ：节点显示在页面上的名称
                                              url        ：节点的链接地址
                                              title      ：鼠标放在节点上所出现的提示信息
                                              target   ：节点链接所打开的目标frame(如框架目标mainFrame,_blank,_self 类)
                                              icon      ：节点关闭时的显示图片的路径
                                              iconOpen：节点打开时的显示图片的路径
                                              open    ：布尔型，节点是否打开（默认为false）
                                             注：open项：顶级节点一般采用true，即pid是－1的节点

                            2：dtree.js文件中
                                             约87－113行是一些默认图片的路径，注意要指对。

二：页面中的书写
          1：默认值的书写规则（从左至右，依次省略）
                          即 tree.add(id,pid,name,url);后面5个参数可以省略
          2：有间隔时的默认值（如存在第6个参数，但第5个参数想用默认值）
                         即 tree.add(id,pid,name,url,"",target);必须这样写
         3：样式表
           （1）：可以将dtree.css中的样式附加到你的应用中的主css中，如a.css
           （2）：也可以同时引用dtree.css与a.css两个文件，但前提条件是两个css文件中不能有重复的样式
     

Html代码  

1. <link href="/jingjindatabase/pub/css/a.css" rel="stylesheet" type="text/css" />  
2. <link href="/jingjindatabase/pub/css/dtree.css" rel="stylesheet" type="text/css" />  

          4：页面代码书写的位置是：一般写在表格的td之中

Javascript代码  

1. <script type="text/javascript" src="/myMobanGis/pub/js/dtree.js"></script>  
2. <script type="text/javascript">  
3. tree = new dTree('tree');  
4. tree.add("1","-1","京津","","","","","",true);  
5. tree.add("11","1","A","","","","","",true);  
6.  tree.add("110","11","A-1","content.jsp?moduleName=XXX","","mainFrame");  
7.  tree.add("111","11","A-2","javascript:void(0)","","链接在哪里显示");  
8.  tree.add("112","11","A-3","javascript:void(0)","","mainFrame");  
9.  tree.add("113","11","A-4","/.jsp","","mainFrame");  
10.  tree.add("114","11","A-5","/.jsp","","mainFrame");  
11.  tree.add("115","11","A-6","/.jsp","","mainFrame");  
12.    
13. tree.add("12","1","B","","","","","",true);  
14.  tree.add("121","12","B-1","javascript:调用本页内的js函数","","mainFrame");  
15.  tree.add("122","12","B-2");  
16. tree.add("13","1","C","","","","","",true);  
17.  tree.add("131","13","C-1","javascript:void(0)","","mainFrame");  
18.  tree.add("132","13","C-2","javascript:void(0)","","mainFrame");  
19.  tree.add("133","13","C-3","javascript:void(0)","","mainFrame");  
20. tree.add("14","1","D","","","","","",true);  
21.  tree.add("141","14","D-1","javascript:void(0)","","mainFrame");  
22. document.write(tree);  
23. </script>  

 说明：这是静态的代码，动态的可用循环加入。其他 tree.add(id,pid,name,url,"","","","",true);

 

三：css文件的注解
1:dtree.css

Css代码  

1. .dtree {//定义目录树节点的字体，字号，颜色  
2.  font-family: Verdana, Geneva, Arial, Helvetica, sans-serif;  
3.  font-size: 12px;  
4.  color: #006600;  
5.  white-space: nowrap;  
6. }  
7. .dtree img {//定义选用节点图标的样式，位置  
8.  border: 0px;  
9.  vertical-align: middle;  
10. }  
11. .dtree a {//  
12.  color: #006600;  
13.  text-decoration: none;  
14. }  
15. .dtree a.node, .dtree a.nodeSel {  
16.  white-space: nowrap;  
17.  padding: 0px 0px 0px 0px;  
18. }  
19. .dtree a.node:hover, .dtree a.nodeSel:hover {  
20.  color: #006600;  
21.  text-decoration: none;  
22. }  
23. .dtree a.nodeSel {  
24.  background-color: #c0d2ec;  
25. }  
26. .dtree .clip {  
27.  overflow: hidden;  
28. }  

 

Javascript代码  

1. a = new dTree('a');  
2. a.config.useStatusText=true;  
3. a.config.closeSameLevel=true;  
4. a.config.useCookies=false;  
5. a.add(0,-1,'Tree example','javascript: void(0);');  
6. a.add(1, 0,'Node 1','javascript:void(0);');  
7. a.add(2, 1,'Node 2','javascript:void(0);');  
8. a.add(3, 1,'Node 3','javascript:void(0);');  
9. a.add(4, 0,'Node 4','javascript:void(0);');  
10. a.add(5, 4,'Node 5','javascript:void(0);');  
11. a.add(6, 4,'Node 6','javascript:void(0);');  
12. a.add(7, 2,'Node 7','javascript:void(0);');  
13. a.add(8, 6,'Node 8','javascript:void(0);');  
14. a.add(9, 1,'Node 9','javascript:void(0);');  
15. a.add(10, 2,'Node 10','javascript:void(0);');  
16. a.add(11, 8,'Node 11','javascript:void(0);');  
17. a.add(12, 2,'Node 12','javascript:void(0);');  
18. a.add(13, 9,'Node 13','javascript:void(0);');  
19. a.add(14, 4,'Node 14','javascript:void(0);');  
20. a.add(15, 2,'Node 15','javascript:void(0);');  
21. a.add(16, 1,'Node 16','javascript:void(0);');  
22. a.add(17, 4,'Node 17','javascript:void(0);');  
23. a.add(18, 6,'Node 18','javascript:void(0);');  
24. a.add(19, 7,'Node 19','javascript:void(0);');  
25. document.write(a);  
26.            
27.    

      tree2.jsp   demo中的一个jsp页面. 静态的生成一棵树. (二级节点)

       

Java代码  

1. <%@ page language="java" pageEncoding="utf-8"%>  
2. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">  
3. <html>  
4.     <head>  
5.         <title>树形结构_____普通生成树的方式</title>  
6.         <link rel="stylesheet" href="dtree.css" type="text/css"></link>  
7.         <script type="text/javascript" src="dtree.js"></script>  
8.         <script>  
9.                /*    
10.                     tree.add(id,pid,name,url,title,target,icon,iconOpen,open); 
11.                     id        ：节点自身的id 
12.                     pid       ：节点的父节点的id 
13.                     name      ：节点显示在页面上的名称 
14.                     url       ：节点的链接地址 
15.                     title     ：鼠标放在节点上所出现的提示信息 
16.                     target    ：节点链接所打开的目标frame（如框架目标mainFrame或是_blank,_self之类） 
17.                     icon      ：节点关闭时的显示图片的路径 
18.                     iconOpen  ：节点打开时的显示图片的路径 
19.                     open      ：布尔型，节点是否打开（默认为false） 
20.                     ------------------------------------------------ 
21.                     东城区、西城区、崇文区、宣武区、朝阳区、丰台区、石景山区、 
22.                     海淀区、门头沟区、房山区、通州区、顺义区、 昌平区、 
23.                    大兴区、怀柔区、平谷区 、 密云县、延庆县 
24.                    ------------------------------------------------ 
25.                 */  
26.         </script>  
27.                 <script type="text/javascript">  
28.                  tree = new dTree('tree');//创建一个对象.  
29.                  tree.add("1","-1","中国","","","","","",false);  
30.                  tree.add("11","1","北京","","","","","",false);  
31.                  tree.add("110","11","东城区","连接地址可以从数据库里面动态查询出来..","东城区","打开目标位置");  
32.                  tree.add("111","11","西城区","连接地址可以从数据库里面动态查询出来..","","链接在哪里显示");  
33.                  tree.add("112","11","崇文区","连接地址可以从数据库里面动态查询出来..","","mainFrame");  
34.                  tree.add("113","11","宣武区","","","_blank");  
35.                  tree.add("114","11","朝阳区","/.jsp","","mainFrame");  
36.                  tree.add("115","11","丰台区","/.jsp","","mainFrame");  
37.                  tree.add("116","11","石景山区","/.jsp","","mainFrame");  
38.                  tree.add("117","11","海淀区","/.jsp","","mainFrame");  
39.                  tree.add("118","11","门头沟区","/.jsp","","mainFrame");  
40.                  tree.add("119","11","房山区","/.jsp","","mainFrame");  
41.                  tree.add("120","11","通州区","/.jsp","","mainFrame");  
42.                  tree.add("121","11","顺义区","/.jsp","","mainFrame");   
43.                  tree.add("122","11","昌平区","/.jsp","","mainFrame");  
44.                  tree.add("123","11","大兴区","/.jsp","","mainFrame");  
45.                  tree.add("124","11","怀柔区","/.jsp","","mainFrame");  
46.                  tree.add("125","11","平谷区","/.jsp","","mainFrame");  
47.                  tree.add("126","11","延庆县","/.jsp","","mainFrame");  
48.                  tree.add("127","11","密云县","/.jsp","","mainFrame");  
49.                  //==================================================  
50.                  tree.add("12","1","湖南","","","","","",false);  
51.                  tree.add("121","12","株洲","javascript:调用本页内的js函数","","mainFrame");  
52.                  tree.add("122","12","长沙");  
53.                 //====================================================  
54.                  tree.add("13","1","湖北","","","","","",false);  
55.                  tree.add("131","13","武汉","javascript:void()","","mainFrame");  
56.                  tree.add("132","13","宜昌","javascript:void()","","mainFrame");  
57.                  tree.add("133","13","孝感","javascript:void()","","mainFrame");  
58.                  //===================================================     
59.                  tree.add("14","1","广东","","","","","",false);  
60.                  tree.add("141","14","佛山","javascript:void()","","mainFrame");  
61.                  document.write(tree);  
62.                 </script>  
63.     </head>  
64.     <body>  
65.     </body>  
66. </html>  

 

         不罗嗦啦..上面的只是让你大概了解一下.dtree怎么用.

 

    dtree+JQuery动态生成树.思路其实很简单...  首先把树的节点信息存储到数据库,然后在servlet或jsp中获取数据库表中的数据,把这些信息写成在xml文件中.然后界面jsp页面通过JQuery实现对改servlet的请求.并且回调方法中接受xml数据对象.并且遍历xml文件,取得xml文件中的节点的属性或文本数据.再循环的对dtree添加节点.。

 

1 . 在 MYSQL 中的test数据库中创建表.tree_table. 

     SQL语句.

Sql代码  

1. tree_table  CREATE TABLE `tree_table` (                      
2.               `id` int(11) NOT NULL auto_increment,          
3.               `nodeId` varchar(12) NOT NULL  ,      
4.               `parentId` varchar(12) NOT NULL  ,    
5.               `hrefAddress` varchar(85)  ,          
6.               `nodeName` varchar(20)  ,             
7.               PRIMARY KEY  (`id`)                            
8.             ) ENGINE=InnoDB DEFAULT CHARSET=gbk      

 

2.连接数据库的类.主要是读取表中的数据.

       

Java代码  

1. package com.dao;  
2.   
3. import java.sql.Connection;  
4. import java.sql.DriverManager;  
5. import java.sql.PreparedStatement;  
6. import java.sql.ResultSet;  
7. import java.sql.SQLException;  
8. import java.util.ArrayList;  
9.   
10. public class DaoTest {  
11.     Connection con = null;  
12.   
13.     public Connection getConnection() {  
14.         Connection conn = null;  
15.         String url = "jdbc:mysql://localhost/test?useUnicode=true&amp;characterEncoding=gbk";  
16.         String user = "root";  
17.         String password = "admin";  
18.         try {  
19.             if (conn == null) {  
20.                 Class.forName("com.mysql.jdbc.Driver").newInstance();  
21.                 conn = DriverManager.getConnection(url, user, password);  
22.             }  
23.         } catch (Exception e) {  
24.             System.out.println("连接失败");  
25.             return null;  
26.         } finally {  
27.             url = null;  
28.             user = null;  
29.             password = null;  
30.         }  
31.         return conn;  
32.     }  
33.   
34.     public ArrayList<Nodes> getNodeInfo() {  
35.         String sql = "select nodeId ,parentId ,hrefAddress ,nodeName from tree_table order by id ";  
36.         PreparedStatement pre = null;  
37.         Connection conn = null;  
38.         conn = getConnection();  
39.         ResultSet rs = null;  
40.         ArrayList<Nodes> list = new ArrayList<Nodes>();  
41.         try {  
42.             pre = conn.prepareStatement(sql);  
43.             rs =pre.executeQuery();  
44.             while (rs.next()){  
45.                 Nodes node = new Nodes();  
46.                 node.setHrefAddress(rs.getString("hrefAddress"));  
47.                 node.setNodeId(rs.getString("nodeId"));  
48.                 node.setParentId(rs.getString("parentId"));  
49.                 node.setNodeName(rs.getString("nodeName"));  
50.                 list.add(node);  
51.             }  
52.             rs.close();  
53.             pre.close();  
54.             conn.close();  
55.         } catch (SQLException e) {  
56.             e.printStackTrace();  
57.         }finally{  
58.              pre = null;  
59.              conn = null;  
60.              rs = null;  
61.         }  
62.         return list;  
63.     }  
64.   
65. }  

 3. 节点。JAVABEAN.类.

   

Java代码  

1. package com.dao;  
2.   
3. public class Nodes {  
4.     private int id;  
5.     private String nodeId;  
6.     private String parentId;  
7.     private String hrefAddress;  
8.     private String nodeName;  
9.   
10.     public int getId() {  
11.         return id;  
12.     }  
13.   
14.     public void setId(int id) {  
15.         this.id = id;  
16.     }  
17.   
18.     public String getNodeId() {  
19.         return nodeId;  
20.     }  
21.   
22.     public void setNodeId(String nodeId) {  
23.         this.nodeId = nodeId;  
24.     }  
25.   
26.     public String getParentId() {  
27.         return parentId;  
28.     }  
29.   
30.     public void setParentId(String parentId) {  
31.         this.parentId = parentId;  
32.     }  
33.   
34.     public String getHrefAddress() {  
35.         return hrefAddress;  
36.     }  
37.   
38.     public void setHrefAddress(String hrefAddress) {  
39.         this.hrefAddress = hrefAddress;  
40.     }  
41.   
42.     public String getNodeName() {  
43.         return nodeName;  
44.     }  
45.   
46.     public void setNodeName(String nodeName) {  
47.         this.nodeName = nodeName;  
48.     }  
49.   
50. }  

 4.创建一个Serlvet 来生成xml文件.

          注意: response.setContentType("text/xml;charset=utf-8");

 

Java代码  

1. package com.handler;  
2.   
3. import java.io.IOException;  
4. import java.io.PrintWriter;  
5. import java.util.ArrayList;  
6.   
7. import javax.servlet.ServletException;  
8. import javax.servlet.http.HttpServlet;  
9. import javax.servlet.http.HttpServletRequest;  
10. import javax.servlet.http.HttpServletResponse;  
11.   
12. import com.dao.DaoTest;  
13. import com.dao.Nodes;  
14. public class NodesPrint extends HttpServlet {  
15.     private static final long serialVersionUID = 1L;  
16.     public void doGet(HttpServletRequest request, HttpServletResponse response)  
17.             throws ServletException, IOException {  
18.                  doPost(request, response);  
19.     }  
20.     public void doPost(HttpServletRequest request, HttpServletResponse response)  
21.             throws ServletException, IOException {  
22.            request.setCharacterEncoding("utf-8");  
23.            response.setContentType("text/xml;charset=utf-8");  
24.            PrintWriter out = response.getWriter();  
25.            DaoTest test = new DaoTest();  
26.            ArrayList<Nodes> list=  test.getNodeInfo();  
27.             if(list!=null&&list.size()>0){  
28.                 out.println("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");  
29.                 out.println("<nodes>");  
30.                 for(int i=0;i<list.size();i++){  
31.                     Nodes node = list.get(i);  
32.                     out.println("<node nodeId='"+node.getNodeId()+"' parentId='"+node.getParentId()+"' hrefAddress='"+node.getHrefAddress()+"'>"+node.getNodeName()+"</node>");  
33.                 }  
34.                 out.println("</nodes>");  
35.             }  
36.     }  
37. }  

 5. 将dtree.js 和dtree.css，jquery.js, img文件夹.放在WebRoot下面.(工程的根目录)

 6.  编写我们的tree.jsp页面.

      

Java代码  

1. <%@ page language="java" pageEncoding="utf-8"%>  
2. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">  
3. <html>  
4.  <head>  
5.   <title>树形结构___ajax请求方式</title>  
6.   <script type="text/javascript" src="dtree.js"></script>  
7.   <script type="text/javascript" src="jquery.js"></script>  
8.   <link rel="stylesheet" href="dtree.css" type="text/css"></link>  
9.   <script type="text/javascript">  
10.    tree = new dTree('tree');//创建一个对象.  
11.    $.ajax({   
12.     <a href="/admin/blogs/350056/'NodesPrint'">url:'NodesPrint'</a>,   
13.     type:'post', //数据发送方式   
14.     dataType:'xml', //接受数据格式   
15.     error:function(json){  
16.              alert( "not lived!");  
17.        },  
18.     async: false ,//同步方式  
19.     success: function(xml){  
20.          $(xml).find("node").each(function(){   
21.         var nodeId=$(this).attr("nodeId");    
22.          var parentId=$(this).attr("parentId");    
23.         var hrefAddress=$(this).attr("hrefAddress");    
24.         var nodeName=$(this).text();   
25.         tree.add(nodeId,parentId,nodeName,hrefAddress,"","","","",false);  
26.                         });  
27.            }  
28.      });  
29.         document.write(tree);  
30.   </script>  
31.  </head>  
32.  <body>  
33.  </body>  
34. </html>  

    demo的结构图: