dtree通过数据库动态生成树

时间：2021-05-05 11:40:51

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：*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 dtree通过数据库动态生成树
  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 dtree通过数据库动态生成树
  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 dtree通过数据库动态生成树
  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 dtree通过数据库动态生成树
  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 dtree通过数据库动态生成树
  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 dtree通过数据库动态生成树
  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 dtree通过数据库动态生成树
  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 dtree通过数据库动态生成树
  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 dtree通过数据库动态生成树
  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 NodesPrintextends HttpServlet {  
  15.     private staticfinal 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 dtree通过数据库动态生成树
  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="'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> 
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