java三级菜单_java 如何用用数组设置一个窗体的三级菜单

A. java中怎样做多级菜单

1。sevice层：

/**
* 构建点取筛取树形动态菜单
* @return tree
* @throws BasicException
*/
public String buildTree()throws BasicException{
try {
StringBuffer xmlBuffer = new StringBuffer();
int a = 0;
xmlBuffer.append("d.add(0,-1,'<input type=\"checkbox\" name=\"ckb\" id=\"0\" onClick=\"check(this.form.ckb)\" value=\"-1\"/>全部');");
xmlBuffer.append("\n");
List list = getDao().findFundInvestType();
if(list!=null&&list.size()!=0){
int b = 0;
for(int i=0;i<list.size();i++){
FundInvestType bean = (FundInvestType)list.get(i);
String code = bean.getInvestCode();
// if is sencond
if(code.length()==2){
b++;
a=i;
xmlBuffer.append("d.add("+b+",0,'<input type=\"checkbox\" name=\"ckb\" id=\"0"+b+"\" onClick=\"selectAll(this.form.ckb,this.id)\" value=\""+bean.getInvestCode()+"\" /><b>"+bean.getInvestName()+"</b>','');");
xmlBuffer.append("\n");
}else if(code.length()==10){
//if is second
if(code.substring(2,10).equals("00000000")){
b++;
a=i;
xmlBuffer.append("d.add("+b+",0,'<input type=\"checkbox\" name=\"ckb\" id=\"0"+b+"\" onClick=\"selectAll(this.form.ckb,this.id)\" value=\""+bean.getInvestCode()+"\"/><b>"+bean.getInvestName()+"</b>','');");
xmlBuffer.append("\n");
}else{//if is third,it father is second
b++;
int k = a+1;
xmlBuffer.append("d.add("+b+","+k+",'<input type=\"checkbox\" name=\"ckb\" id=\"ckb0"+k+"\" value=\""+bean.getInvestCode()+"\"/>"+bean.getInvestName()+"','');");
xmlBuffer.append("\n");
}
}
}
}
return xmlBuffer.toString();
} catch (RuntimeException e) {
throw new BasicException(e.getMessage());
}
}

2。jsp页面：

<%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*" errorPage="" %>
<%
String webapp=request.getContextPath()+"/fund";
%>
<html >
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>基金投资类型</title>
<link rel="stylesheet" type="text/css" href="<%=webapp%>/Pub/Style.css">
<link rel="StyleSheet" href="<%=webapp%>/menu/dtree.css" type="text/css" />
<SCRIPT LANGUAGE="JavaScript">

</script>
</head>
<body onLoad="disabledAll()">
<script type="text/javascript" src="<%=webapp%>/menu/dtree_2.js"></script>
<form name="myform" method="post" id="myform">
<table width="250" border="0" cellspacing="0" cellpadding="5">
<tr>
<td colspan="2"><table width="100%" border=0 cellpadding=0 cellspacing=0 bgcolor="#FFFFFF">
<tr>
<td>基金投资类型</td>
</tr>
<tr>
<td>
<div class="dtree">
<script type="text/javascript">

</script>
</div>
</td>
</tr>
</table></td>
</tr>
<tr height="25" >
<td width="86" height="0"align="center"><a href="#" onClick="onSubit()"><img src="<%=webapp%>/img/btn_sure.gif" width="51" height="21" border="0"></a></td>
<td width="144" height="0"><a href="#" onClick="cancelAll()"><img src="<%=webapp%>/img/btn_cancel.gif" width="51" height="21" border="0"></a></td>
</tr>
</table>
</form>
</body>
</html>

3。js文件：

// Node object
function Node(id, pid, name, url, title, target, icon, iconOpen, open) {
this.id = id;
this.pid = pid;
this.name = name;
this.url = url;
this.title = title;
this.target = target;
this.icon = icon;
this.iconOpen = iconOpen;
this._io = open || false;
this._is = false;
this._ls = false;
this._hc = false;
this._ai = 0;
this._p;
};

// Tree object
function dTree(objName) {
this.config = {
target : null,
folderLinks : true,
useSelection : true,
useCookies : true,
useLines : true,
useIcons : true,
useStatusText : false,
closeSameLevel : false,
inOrder : false
}
this.icon = {
root : './fund/menu/img/base.gif',
folder : './fund/menu/img/folder.gif',
folderOpen : './fund/menu/img/folderopen.gif',
node : './fund/menu/img/page.gif',
empty : './fund/menu/img/empty.gif',
line : './fund/menu/img/line.gif',
join : './fund/menu/img/join.gif',
joinBottom : './fund/menu/img/joinbottom.gif',
plus : './fund/menu/img/plus.gif',
plusBottom : './fund/menu/img/plusbottom.gif',
minus : './fund/menu/img/minus.gif',
minusBottom : './fund/menu/img/minusbottom.gif',
nlPlus : './fund/menu/img/nolines_plus.gif',
nlMinus : './fund/menu/img/nolines_minus.gif'
};
this.obj = objName;
this.aNodes = [];
this.aIndent = [];
this.root = new Node(-1);
this.selectedNode = null;
this.selectedFound = false;
this.completed = false;
};

// Adds a new node to the node array
dTree.prototype.add = function(id, pid, name, url, title, target, icon, iconOpen, open) {
this.aNodes[this.aNodes.length] = new Node(id, pid, name, url, title, target, icon, iconOpen, open);
};

// Open/close all nodes
dTree.prototype.openAll = function() {
this.oAll(true);
};
dTree.prototype.closeAll = function() {
this.oAll(false);
};

// Outputs the tree to the page
dTree.prototype.toString = function() {
var str = '<div class="dtree">\n';
if (document.getElementById) {
if (this.config.useCookies) this.selectedNode = this.getSelected();
str += this.addNode(this.root);
} else str += 'Browser not supported.';
str += '</div>';
if (!this.selectedFound) this.selectedNode = null;
this.completed = true;
return str;
};

// Creates the tree structure
dTree.prototype.addNode = function(pNode) {
var str = '';
var n=0;
if (this.config.inOrder) n = pNode._ai;
for (n; n<this.aNodes.length; n++) {
if (this.aNodes[n].pid == pNode.id) {
var cn = this.aNodes[n];
cn._p = pNode;
cn._ai = n;
this.setCS(cn);
if (!cn.target && this.config.target) cn.target = this.config.target;
if (cn._hc && !cn._io && this.config.useCookies) cn._io = this.isOpen(cn.id);
if (!this.config.folderLinks && cn._hc) cn.url = null;
if (this.config.useSelection && cn.id == this.selectedNode && !this.selectedFound) {
cn._is = true;
this.selectedNode = n;
this.selectedFound = true;
}
str += this.node(cn, n);
if (cn._ls) break;
}
}
return str;
};

// Creates the node icon, url and text
dTree.prototype.node = function(node, nodeId) {
var str = '<div class="dTreeNode">' + this.indent(node, nodeId);
if (this.config.useIcons) {
if (!node.icon) node.icon = (this.root.id == node.pid) ? this.icon.root : ((node._hc) ? this.icon.folder : this.icon.node);
if (!node.iconOpen) node.iconOpen = (node._hc) ? this.icon.folderOpen : this.icon.node;
if (this.root.id == node.pid) {
node.icon = this.icon.root;
node.iconOpen = this.icon.root;
}
str += '<img id="i' + this.obj + nodeId + '" src="' + ((node._io) ? node.iconOpen : node.icon) + '" alt="" />';
}
if (node.url) {
str += '<a id="s' + this.obj + nodeId + '" class="' + ((this.config.useSelection) ? ((node._is ? 'nodeSel' : 'node')) : 'node') + '" href="' + node.url + '"';
if (node.title) str += ' title="' + node.title + '"';
if (node.target) str += ' target="' + node.target + '"';
if (this.config.useStatusText) str += ' onmouseover="window.status=\'' + node.name + '\';return true;" onmouseout="window.status=\'\';return true;" ';
if (this.config.useSelection && ((node._hc && this.config.folderLinks) || !node._hc))
str += ' onclick="javascript: ' + this.obj + '.s(' + nodeId + ');"';
str += '>';
}
else if ((!this.config.folderLinks || !node.url) && node._hc && node.pid != this.root.id)
str += '<a href="javascript: ' + this.obj + '.o(' + nodeId + ');" class="node">';
str += node.name;
if (node.url || ((!this.config.folderLinks || !node.url) && node._hc)) str += '</a>';
str += '</div>';
if (node._hc) {
str += '<div id="d' + this.obj + nodeId + '" class="clip" style="display:' + ((this.root.id == node.pid || node._io) ? 'block' : 'none') + ';">';
str += this.addNode(node);
str += '</div>';
}
this.aIndent.pop();
return str;
};

// Adds the empty and line icons
dTree.prototype.indent = function(node, nodeId) {
var str = '';
if (this.root.id != node.pid) {
for (var n=0; n<this.aIndent.length; n++)
str += '<img src="' + ( (this.aIndent[n] == 1 && this.config.useLines) ? this.icon.line : this.icon.empty ) + '" alt="" />';
(node._ls) ? this.aIndent.push(0) : this.aIndent.push(1);
if (node._hc) {
str += '<a href="javascript: ' + this.obj + '.o(' + nodeId + ');"><img id="j' + this.obj + nodeId + '" src="';
if (!this.config.useLines) str += (node._io) ? this.icon.nlMinus : this.icon.nlPlus;
else str += ( (node._io) ? ((node._ls && this.config.useLines) ? this.icon.minusBottom : this.icon.minus) : ((node._ls && this.config.useLines) ? this.icon.plusBottom : this.icon.plus ) );
str += '" alt="" /></a>';
} else str += '<img src="' + ( (this.config.useLines) ? ((node._ls) ? this.icon.joinBottom : this.icon.join ) : this.icon.empty) + '" alt="" />';
}
return str;
};

// Checks if a node has any children and if it is the last sibling
dTree.prototype.setCS = function(node) {
var lastId;
for (var n=0; n<this.aNodes.length; n++) {
if (this.aNodes[n].pid == node.id) node._hc = true;
if (this.aNodes[n].pid == node.pid) lastId = this.aNodes[n].id;
}
if (lastId==node.id) node._ls = true;
};

// Returns the selected node
dTree.prototype.getSelected = function() {
var sn = this.getCookie('cs' + this.obj);
return (sn) ? sn : null;
};

// Highlights the selected node
dTree.prototype.s = function(id) {
if (!this.config.useSelection) return;
var cn = this.aNodes[id];
if (cn._hc && !this.config.folderLinks) return;
if (this.selectedNode != id) {
if (this.selectedNode || this.selectedNode==0) {
eOld = document.getElementById("s" + this.obj + this.selectedNode);
eOld.className = "node";
}
eNew = document.getElementById("s" + this.obj + id);
eNew.className = "nodeSel";
this.selectedNode = id;
if (this.config.useCookies) this.setCookie('cs' + this.obj, cn.id);
}
};

// Toggle Open or close
dTree.prototype.o = function(id) {
var cn = this.aNodes[id];
this.nodeStatus(!cn._io, id, cn._ls);
cn._io = !cn._io;
if (this.config.closeSameLevel) this.closeLevel(cn);
if (this.config.useCookies) this.updateCookie();
};

// Open or close all nodes
dTree.prototype.oAll = function(status) {
for (var n=0; n<this.aNodes.length; n++) {
if (this.aNodes[n]._hc && this.aNodes[n].pid != this.root.id) {
this.nodeStatus(status, n, this.aNodes[n]._ls)
this.aNodes[n]._io = status;
}
}
if (this.config.useCookies) this.updateCookie();
};

// Opens the tree to a specific node
dTree.prototype.openTo = function(nId, bSelect, bFirst) {
if (!bFirst) {
for (var n=0; n<this.aNodes.length; n++) {
if (this.aNodes[n].id == nId) {
nId=n;
break;
}
}
}
var cn=this.aNodes[nId];
if (cn.pid==this.root.id || !cn._p) return;
cn._io = true;
cn._is = bSelect;
if (this.completed && cn._hc) this.nodeStatus(true, cn._ai, cn._ls);
if (this.completed && bSelect) this.s(cn._ai);
else if (bSelect) this._sn=cn._ai;
this.openTo(cn._p._ai, false, true);
};

// Closes all nodes on the same level as certain node
dTree.prototype.closeLevel = function(node) {
for (var n=0; n<this.aNodes.length; n++) {
if (this.aNodes[n].pid == node.pid && this.aNodes[n].id != node.id && this.aNodes[n]._hc) {
this.nodeStatus(false, n, this.aNodes[n]._ls);
this.aNodes[n]._io = false;
this.closeAllChildren(this.aNodes[n]);
}
}
}

// Closes all children of a node
dTree.prototype.closeAllChildren = function(node) {
for (var n=0; n<this.aNodes.length; n++) {
if (this.aNodes[n].pid == node.id && this.aNodes[n]._hc) {
if (this.aNodes[n]._io) this.nodeStatus(false, n, this.aNodes[n]._ls);
this.aNodes[n]._io = false;
this.closeAllChildren(this.aNodes[n]);
}
}
}

// Change the status of a node(open or closed)
dTree.prototype.nodeStatus = function(status, id, bottom) {
eDiv = document.getElementById('d' + this.obj + id);
eJoin = document.getElementById('j' + this.obj + id);
if (this.config.useIcons) {
eIcon = document.getElementById('i' + this.obj + id);
eIcon.src = (status) ? this.aNodes[id].iconOpen : this.aNodes[id].icon;
}
eJoin.src = (this.config.useLines)?
((status)?((bottom)?this.icon.minusBottom:this.icon.minus):((bottom)?this.icon.plusBottom:this.icon.plus)):
((status)?this.icon.nlMinus:this.icon.nlPlus);
eDiv.style.display = (status) ? 'block': 'none';
};

// [Cookie] Clears a cookie
dTree.prototype.clearCookie = function() {
var now = new Date();
var yesterday = new Date(now.getTime() - 1000 * 60 * 60 * 24);
this.setCookie('co'+this.obj, 'cookieValue', yesterday);
this.setCookie('cs'+this.obj, 'cookieValue', yesterday);
};

// [Cookie] Sets value in a cookie
dTree.prototype.setCookie = function(cookieName, cookieValue, expires, path, domain, secure) {
document.cookie =
escape(cookieName) + '=' + escape(cookieValue)
+ (expires ? '; expires=' + expires.toGMTString() : '')
+ (path ? '; path=' + path : '')
+ (domain ? '; domain=' + domain : '')
+ (secure ? '; secure' : '');
};

// [Cookie] Gets a value from a cookie
dTree.prototype.getCookie = function(cookieName) {
var cookieValue = '';
var posName = document.cookie.indexOf(escape(cookieName) + '=');
if (posName != -1) {
var posValue = posName + (escape(cookieName) + '=').length;
var endPos = document.cookie.indexOf(';', posValue);
if (endPos != -1) cookieValue = unescape(document.cookie.substring(posValue, endPos));
else cookieValue = unescape(document.cookie.substring(posValue));
}
return (cookieValue);
};

// [Cookie] Returns ids of open nodes as a string
dTree.prototype.updateCookie = function() {
var str = '';
for (var n=0; n<this.aNodes.length; n++) {
if (this.aNodes[n]._io && this.aNodes[n].pid != this.root.id) {
if (str) str += '.';
str += this.aNodes[n].id;
}
}
this.setCookie('co' + this.obj, str);
};

// [Cookie] Checks if a node id is in a cookie
dTree.prototype.isOpen = function(id) {
var aOpen = this.getCookie('co' + this.obj).split('.');
for (var n=0; n<aOpen.length; n++)
if (aOpen[n] == id) return true;
return false;
};

// If Push and pop is not implemented by the browser
if (!Array.prototype.push) {
Array.prototype.push = function array_push() {
for(var i=0;i<arguments.length;i++)
this[this.length]=arguments[i];
return this.length;
}
};
if (!Array.prototype.pop) {
Array.prototype.pop = function array_pop() {
lastElement = this[this.length-1];
this.length = Math.max(this.length-1,0);
return lastElement;
}
};

B. java 如何生成三级树形菜单

是要返回一个json串吧。mybytis里设置好要返回自定义的结果集合。就直接可以

C. 用Java连接mysql数据库编写省市区三级联动菜单选项JComboBox，在事件处理的时候出错

你应该考虑在所有事件联动响应时首先清空下拉，这样绑定的事件就不会影响了

D. java中如何建三级子菜单，二级的我会，不要把二级当三级放上来撒。。。

JMenuBar menuBar=new JMenuBar();
JMenu menu=new JMenu("a");//一级
JMenu menu2=new JMenu("aa");//二级
JMenu menu3=new JMenu("aaa");//三级
JMenu menu3=new JMenu("aaa");//四级
JMenuItem menuItem=new JMenuItem("a1");//五级

menu.add(menu2);
menu2.add(menu3);
menu3.add(menu4);
menu4.add(menuItem);
menuBar.add(menu);
setJMenuBar(menuBar);

如果想创建M级菜单栏，则多定义几个JMenu。

E. java编写鼠标悬停在二级菜单，点击三级菜单

import java.awt.*;
import javax.swing.*;
public class ErjiMenu extends JFrame
{
JPanel jp=new JPanel();
JMenuBar menubar=new JMenuBar();
JMenu m1=new JMenu("菜单");
JMenu m2=new JMenu("菜单");
JMenuItem item1=new JMenuItem("菜单项");
JMenuItem item2=new JMenuItem("菜单项1");
JMenuItem item3=new JMenuItem("菜单项2");
public ErjiMenu()
{
jp.setLayout(new BorderLayout());
m2.add(item2); //m2添加菜单项。
m2.add(item3);

m1.add(item1);
m1.add(m2); //m1把m2添加进去，作为二级菜单.

menubar.add(m1);

jp.add(menubar,BorderLayout.NORTH);
this.add(jp);
this.setBounds(100,100,380,200);
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static void main(String[] args)
{
new ErjiMenu();
}
}

不用JPopupMenu,更简单。

F. java 如何用用数组设置一个窗体的三级菜单

这不简单吗，直接循环加上去就可以了。
import javax.swing.*;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class List extends JFrame{
public List(){
initialization();
setTitle("三级菜单");
setBounds(300,300,400,300);
setLayout(null);
Container c=getContentPane();
setVisible(true);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}
public void initialization(){
JMenu jmenuTwo=null;
String[] menubar={"编辑","帮助"};
String[][] submenu={{"复制","粘贴","","历史记录"},{"关于三级菜单"}};
String[] threemenu={"撤消","恢复"};
JMenuBar jmenubar=new JMenuBar();//创建菜单栏
for(int i=0;i<menubar.length;i++){
JMenu jmenu=new JMenu(menubar[i]);
jmenubar.add(jmenu);
for(int j=0;j<submenu[i].length;j++){
if("".equals(submenu[i][j])){
jmenu.addSeparator();//添加一条横线
}else{
jmenuTwo=new JMenu(submenu[i][j]);
jmenu.add(jmenuTwo);
if(j<2&&i==0){
for(int k=0;k<threemenu.length;k++){
JMenuItem menu3=new JMenuItem(threemenu[k]);
jmenuTwo.add(menu3);
}
}
}
}
this.setJMenuBar(jmenubar);//JFrame加菜单栏时用setJmenuBar(),不用add /
}
}
public static void main(String[] args){
new List();
}
}

G. 在JAVA中如何为菜单添加分隔线如何创建复选菜单项如何创建多级菜单

菜单Menu类的对象调用addSeparator();添加分割线，此行代码添加在你要分割线出现的位置上。
而创建复选菜单，用CheckboxMenuItem类创建菜单项就行。
至于多级菜单，只要把一个Menu类的对象添加到另一个Menu类的对象，就可以产生多级菜单了。

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