1.导入 dtree文件 dtree.css img文件夹 dtree.js
2. 建立对应 的数据库 1 父ID name id
3 建立连接类 mysql 例子
package com.dtree.test; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.ResultSetMetaData; import java.sql.SQLException; import java.sql.Statement; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import com.opensymphony.xwork2.ActionSupport; public class ConnectionManager { private static final String driver ="org.gjt.mm.mysql.Driver"; private static final String url = "jdbc:mysql://localhost:3306/yuqing?useUnicode=true&characterEncoding=utf8"; private static final String username="root"; private static final String userpwd="zfn"; public static Connection getConnection(){ Connection conn=null; try{ Class.forName(driver); conn=DriverManager.getConnection(url,username,userpwd); }catch(Exception ex){ ex.printStackTrace(); } return conn; } public static void closeConnection(Connection conn){ try{ if(conn!=null && (!conn.isClosed())){ conn.close(); } }catch(SQLException ex){ ex.printStackTrace(); } } public static void closeResultSet(ResultSet res){ try{ if(res!=null){ res.close(); res=null; } }catch(SQLException ex){ ex.printStackTrace(); } } public static void closeStatement(PreparedStatement stmt){ try{ if(stmt!=null){ stmt.close(); } }catch(SQLException ex){ ex.printStackTrace(); } } }4. 实现类
package com.dtree.test; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.util.ArrayList; import java.util.List; public class OrganizationService { private Connection conn; private PreparedStatement titleQuery; private ResultSet results; public List getOrganization(){ List list = new ArrayList(); try { conn=ConnectionManager.getConnection(); String sql="select * from treetest"; titleQuery=conn.prepareStatement(sql); results=titleQuery.executeQuery(); while(results.next()){ Organization org1 = new Organization(); org1.setId(results.getInt("id")); org1.setParentId(results.getInt("parentId")); org1.setName(results.getString("name")); list.add(org1); } } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } finally{ ConnectionManager.closeResultSet(results); ConnectionManager.closeStatement(titleQuery); ConnectionManager.closeConnection(conn); } return list; } public int insertUser1(String name) { int num=0; try { conn=ConnectionManager.getConnection(); String sql="insert into treetest (parentId,name,pid)values(0,?,1)"; titleQuery=conn.prepareStatement(sql); titleQuery.setString(1,name); num=titleQuery.executeUpdate(); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); }finally{ ConnectionManager.closeResultSet(results); ConnectionManager.closeStatement(titleQuery); ConnectionManager.closeConnection(conn); } return num; } public int insertUser2(int parentId,String name) { int num=0; try { conn=ConnectionManager.getConnection(); String sql="insert into treetest (parentId,name,pid)values(?,?,2)"; titleQuery=conn.prepareStatement(sql); titleQuery.setInt(1,parentId); titleQuery.setString(2,name); num=titleQuery.executeUpdate(); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); }finally{ ConnectionManager.closeResultSet(results); ConnectionManager.closeStatement(titleQuery); ConnectionManager.closeConnection(conn); } return num; } public List getOrganization1(){ List list = new ArrayList(); try { conn=ConnectionManager.getConnection(); String sql="select * from treetest where pid=1"; titleQuery=conn.prepareStatement(sql); results=titleQuery.executeQuery(); while(results.next()){ Organization org1 = new Organization(); org1.setId(results.getInt("id")); org1.setParentId(results.getInt("parentId")); org1.setName(results.getString("name")); list.add(org1); } } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } finally{ ConnectionManager.closeResultSet(results); ConnectionManager.closeStatement(titleQuery); ConnectionManager.closeConnection(conn); } return list; } }5. 实体类
package com.dtree.test; public class Organization { private int id; private String name; private int parentId; public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getParentId() { return parentId; } public void setParentId(int parentId) { this.parentId = parentId; } }6 action
package com.dtree.test; import java.util.ArrayList; import java.util.List; import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionSupport; public class DtreeAction extends ActionSupport { List list = new ArrayList(); private String name = null; private String name2 = null; private int parentId; public int getParentId() { return parentId; } public void setParentId(int parentId) { this.parentId = parentId; } public String getName2() { return name2; } public void setName2(String name2) { this.name2 = name2; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String execute() { OrganizationService service = new OrganizationService(); list = service.getOrganization(); return SUCCESS; } public String insertname1() { OrganizationService service = new OrganizationService(); System.out.print(name); int num=service.insertUser1(name); return SUCCESS; } public String insertname2() { OrganizationService service = new OrganizationService(); System.out.println(parentId); System.out.println(name); int num=service.insertUser2(parentId, name2); return SUCCESS; } public List getList() { return list; } public void setList(List list) { this.list = list; } }6 struts xml
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd"> <struts> <package name="dtree" namespace="/dtree" extends="struts-default"> <action name="dtree" class="com.dtree.test.DtreeAction"> <result name="success">/dtree.jsp</result> </action> <action name="insertname1" class="com.dtree.test.DtreeAction" method="insertname1"> <result name="success">/dtree.jsp</result> </action> <action name="insertname2" class="com.dtree.test.DtreeAction" method="insertname2"> <result name="success">/dtree.jsp</result> </action> </package> </struts>
7 显示树形菜单 jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <%@ taglib prefix="s" uri="/struts-tags" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <base href="<%=basePath%>"> <title>树形结构例子</title> <link rel="stylesheet" type="text/css" href="styles.css"> <link rel="StyleSheet" href="css/dtree.css" type="text/css" /> <script type="text/javascript" src="script/dtree.js"></script> </head> <body> <div class="dtree"> <script type="text/javascript"> d = new dTree('d'); //构造根节点 d.add(0,-1,'学校人员分布'); <s:iterator value="list"> d.add(<s:property value="id"/>,<s:property value="parentId"/>,'<s:property value="name"/>','example01.html'); </s:iterator> document.write(d); </script> </div> </body> </html>8 动态增加 树形菜单列的jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <%@ page import="com.dtree.test.*" %> <%@ taglib prefix="s" uri="/struts-tags" %> <% %> <html> <head> <title></title> <script type="text/javascript"> function sbmt(){ document.fm.action="dtree/insertname1.action"; fm.submit(); } function sbmt2(){ document.fm.action="dtree/insertname2.action"; fm.submit(); } </script> </head> <body> <form name="fm" method="post" action=""> <p>m > <br></p> <p> </p> <p> </p> <p> </p> <p> </p> <table width="846" height="63" border="0"> <tr> <th width="118" scope="col"><div align="center">插入一级名称</div></th> <th width="217" scope="col"><div align="center"> <input type="text" name="name"> </div></th> <th width="185" scope="col"> </th> <th width="239" scope="col"><div align="center"> <input type="button" onClick="return sbmt()" name="Submit" value="提交"> </div></th> <th width="65" scope="col"> </th> </tr> <tr> <td><div align="center">插入二级名称</div></td> <td><div align="center"> <input type="text" name="name2"> </div></td> <td><select name="parentId" > <% OrganizationService o=new OrganizationService(); List list=o.getOrganization1(); for(int i=0;i<list.size();i++){ Organization o1=(Organization)list.get(i); %> <option value=<%=o1.getId() %> selected><%=o1.getName() %></option> <%} %> </select> </td> <td><div align="center"> <input type="button" onClick="return sbmt2<span style="white-space:pre"> </span>()" name="Submit2" value="提交"> </div></td> <td> </td> </tr> <tr> <td><div align="center">插入三级名称</div></td> <td><div align="center"> <input type="text" name="name3"> </div></td> <td><select name="select2"> </select></td> <td><div align="center"> <input type="button" name="Submit3" value="提交"> </div></td> <td> </td> </tr> </table> </form> </body> </html>本文章为转载内容，我们尊重原作者对文章享有的著作权。如有内容错误或侵权问题，欢迎原作者联系我们进行内容更正或删除文章。
