Javascript 文件夹选择框的两种解决方案

解决方案1:
调用windows 的shell,但会有安全问题.

* browseFolder.js
* 该文件定义了BrowseFolder()函数，它将提供一个文件夹选择对话框
* 以供用户实现对系统文件夹选择的功能
* 文件夹选择对话框起始目录由
* Shell.BrowseForFolder(WINDOW_HANDLE, Message, OPTIONS, strPath)函数
* 的strPath参数设置
* 例如：0x11--我的电脑
* 0 --桌面
* "c:\\"--系统C盘
*
* 用如下代码把该函数应用到一个HTML文件中：
* <script src="browseFolder.js"></script>
* 或把下面代码直接COPY到<script language="javascript">...</script>标签中；

* 特别注意的是,由于安全方面的问题,你还需要如下设置才能使本JS代码正确运行,
* 否者会出现"没有权限"的问题.
*
* 1、设置可信任站点（例如本地的可以为：http://localhost）
* 2、其次：可信任站点安全级别自定义设置中：设置下面的选项
* "对没有标记为安全的ActiveX控件进行初始化和脚本运行"----"启用"

browserFolder.js:

复制代码代码如下:

 
/**//*** 
path 要显示值的对象id 
****/ 
function browseFolder(path) { 
try { 
var Message = "\u8bf7\u9009\u62e9\u6587\u4ef6\u5939"; //选择框提示信息 
var Shell = new ActiveXObject("Shell.Application"); 
var Folder = Shell.BrowseForFolder(0, Message, 64, 17);//起始目录为：我的电脑 
//var Folder = Shell.BrowseForFolder(0,Message,0); //起始目录为：桌面 
if (Folder != null) { 
Folder = Folder.items(); // 返回 FolderItems 对象 
Folder = Folder.item(); // 返回 Folderitem 对象 
Folder = Folder.Path; // 返回路径 
if (Folder.charAt(Folder.length - 1) != "\\") { 
Folder = Folder + "\\"; 
} 
document.getElementById(path).value = Folder; 
return Folder; 
} 
} 
catch (e) { 
alert(e.message); 
} 
} 

使用的时候:

复制代码代码如下:

 
<td> 
<input type="text" name="path" /> 
</td> 
<td> 
<input type="button" onclick="browseFolder('path')" 
value="选择生成路径" /> 
</td> 

2.解决方案二:
自己写一个js读取本地硬盘的选择框, 缺点是外观上较上一个差一些. <html>

复制代码代码如下:

 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312"> 
<title>无标题文档</title> 
</head> 
<body> 
<table border="0" cellpadding="0" width="100%" id="tb_show"> 
<tr> 
<td width="18%">文件保存位置:</td> 
<td width="82%"> 
<%--<html:file property="file" size="40" styleClass="inputbox"/>--%> 
<input name="backDir" type="text" value ="C:\" size="100" width="500"> 
</td> 
</tr> 

<tr> 
<td>目录位置:</td> 
<td> 
<select name="tables_drive" id="tables_drives" onchange="get_drives()" ></select> 
</td> 
</tr> 

<tr> 
<td colspan="2"> 
<select name="table_folder" id="table_folder" size="10" multiple ondblclick="get_file()"></select> 
</td> 
</tr> 

<tr> 
<td colspan="2"> 
<font color="red">说明：双击列表框的一个选项，就将该文件夹下面的文件夹显示在该列表框中。第一个就是根目录</font> 
</td> 
</tr> 
</table> 
</body> 
</html> 
<script> 
/**//* 
*初始化，将系统所有的驱动器放入table_drives列表 
*/ 
window.onload = new function init() 
{ 
var fso, s, n, e, x; 
fso = new ActiveXObject("Scripting.FileSystemObject"); 
e = new Enumerator(fso.Drives); 
s = ""; 
for (; !e.atEnd(); e.moveNext()) 
{ 
x = e.item(); 
s = s + x.DriveLetter; 
s += ":"; 
if (x.DriveType == 3) 
n = x.ShareName; 
else if (x.IsReady) 
n = x.VolumeName; 
else 
n = "[驱动器未就绪]"; 
s += n + ","; 
} 
var drives = s.split(","); 
var tableDrives = document.getElementById("tables_drives"); 
for ( var i = 0; i < drives.length-1; i++ ) 
{ 
var option = document.createElement("OPTION"); 
drives[i].split(":"); 
option.value = "["+drives[i].split(":")[0]+":]"+drives[i].split(":")[1]; 
option.text = "["+drives[i].split(":")[0]+":]"+drives[i].split(":")[1]; 
tableDrives.add(option); 
} 
} 

/**//* 
*tables_drives列表中选中的驱动器上所有文件夹放入table_folder列表中 
*/ 
function get_drives() 
{ 
var tableDrives = document.getElementById("tables_drives"); 
var tableFolders = document.getElementById("table_folder"); 
for ( var i = 0; i < tableDrives.options.length; i++ ) 
{ 
if ( tableDrives.options[i].selected == true ) 
{ 
var fso, f, fc, s; 
var drive = tableDrives.options[i].value.split(":")[0].substring(1,tableDrives.options[i].value.split(":")[0].length); 
document.getElementById("backDir").value = drive + ":\\"; 
fso = new ActiveXObject("Scripting.FileSystemObject"); 
if (fso.DriveExists(drive)) 
{ 
d = fso.GetDrive(drive); 
if ( d.IsReady ) 
{ 
f = fso.GetFolder(d.RootFolder); 
fc = new Enumerator(f.SubFolders); 
s = ""; 
for (;!fc.atEnd(); fc.moveNext()) 
{ 
s += fc.item(); 
s += ","; 
} 

var len = tableFolders.options.length; 
while(len >= 0) 
{ 
tableFolders.options.remove(len); 
len--; 
} 
var option = document.createElement("OPTION"); 
option.value = drive + ":\\"; 
option.text = drive + ":\\"; 
tableFolders.add(option); 
var folders = s.split(","); 
for ( j = 0; j < folders.length -1; j++) 
{ 
option = document.createElement("OPTION"); 
option.value = folders[j]; 
option.text = folders[j]; 
tableFolders.add(option); 
} 
} 
else 
{ 
alert("无法改变当前内容！") 
} 
} 
else 
return false; 
} 
} 
} 

/**//* 
*table_folder双击选项中的一个选项，就将该文件夹下面的文件夹显示在table_folder列表中。 
*/ 
function get_file() 
{ 
var tableFolders = document.getElementById("table_folder"); 
var tableDrives = document.getElementById("tables_drives"); 
for ( var i = 0; i < tableFolders.options.length; i++ ) 
{ 
if ( tableFolders.options[i].selected == true ) 
{ 
var fso, f, fc, s; 
var folderpath = tableFolders.options[i].value.substring(0,tableFolders.options[i].value.length); 
if ( folderpath.charAt(folderpath.length-1) == "\\" ) 
{ 
document.getElementById("backDir").value = folderpath; 
} 
else 
{ 
document.getElementById("backDir").value = folderpath + "\\"; 
} 


fso = new ActiveXObject("Scripting.FileSystemObject"); 
f = fso.GetFolder(folderpath); 
fc = new Enumerator(f.SubFolders); 
s = ""; 
for (;!fc.atEnd(); fc.moveNext()) 
{ 
s += fc.item(); 
s += ","; 
} 
var len = tableFolders.options.length; 
while(len >= 0) 
{ 
tableFolders.options.remove(len); 
len--; 
} 
var opt = ""; 
var opt1 = ""; 
for ( j = 0; j < folderpath.split("\\").length; j++ ) 
{ 
var option = document.createElement("OPTION"); 
opt = opt + folderpath.split("\\")[j]+"\\"; 
if ( j > 0) 
{ 
opt1 = opt; 
option.value = opt1.substring(0,opt1.length-1); 
option.text = opt1.substring(0,opt1.length-1); 
tableFolders.add(option); 
} 
else 
{ 
option.value = opt; 
option.text = opt; 
tableFolders.add(option); 
} 

} 
if ( tableFolders.options[0].value == tableFolders.options[1].value ) 
{ 
tableFolders.options.remove(1); 
} 
if ( s != "" ) 
{ 
var folders = s.split(","); 
for ( j = 0; j < folders.length -1; j++) 
{ 
option = document.createElement("OPTION"); 
option.value = folders[j]; 
option.text = folders[j]; 
tableFolders.add(option); 
} 
} 
} 
} 
} 
</script> 

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