dtree实现动态加载树形菜单，动态插入树形菜单
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();
}
}
}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
/dtree.jsp
/dtree.jsp
/dtree.jsp
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" %>
树形结构例子
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" %>
<%
%>