document.getElementById（""my-file""）.files办法用于获取到用户所选择的文件的凑集，一般景象下都是选择单一文件（貌似FireFox如许做是支撑多文件选择的，不过没有试过，读者可以本身去测验测验），item数组可以获得此中的某一个文件，然后我们就可以应用 nsIDOMFile所供给的属性和办法了。它包含2个属性和3个办法：
fileName：用于获取到用户所选文件的名称，这和直接取value值所获得的成果一样。
fileSize：获得用户所选文件的大小。
getAsBinary（）：获得用户所选文件的二进制数据。
getAsDataURL（）：获得用户所选文件的路径，该路径被加密了，今朝只能在FireFox中应用。
getAsText（）：获得用户所选文件的指定字符编码的文本。
有一点须要申明，办法getAsDataURL（）可以取得用户所选文件的本地路径，然则这个路径的字符串文本被FireFox加密了，并且这段密文只能被FireFox辨认，其它的浏览器不克不及辨认，也就是说我将被加密后的路径直接赋值给一个img标签的src属性，在FireFox中是可以直接显示出的，而在IE中却不可。
| 代码如下 |
复制代码 |
|
get file input full pathtitle><br />
<script language=""javascript""><br />
function getFullPath（obj）<br />
{<br />
if（obj）<br />
{<br />
if （window.navigator.userAgent.indexOf（"MSIE"）>=1） //ie<br />
{<br />
obj.（）;<br />
return document.ion.createRange（）.text;<br />
}<br />
else if（window.navigator.userAgent.indexOf（"Firefox"）>=1） //firefox<br />
{<br />
if（obj.files）<br />
{<br />
return obj.files.item（0）.getAsDataURL（）;<br />
}<br />
return obj.value;<br />
}<br />
return obj.value;<br />
}<br />
}<br />
</script> <br />
<head><br />
<body><br />
<input type="file" onchange="document.getElementById（""img""）.src=getFullPath（this）;" /><br />
<img id="img" /><br />
</body><br />
</html></p>
</td>
</tr>
</table>
<p>上面实例在ie8中无法获取哦，下面我再给大家介绍一款可以兼容ie6,ie7,ie8中的解决办法，大家可参考。</p>
<p>例子二</p>
<table width="620" align="center" border="0" cellpadding="1" cellspacing="1" style="background:#FB7">
<tr>
<td width="464" height="27" bgcolor="#FFE7CE"> 代码如下</td>
<td width="109" align="center" bgcolor="#FFE7CE" style="cursor:pointer;" onClick="doCopy('copy9753')">复制代码</td>
</tr>
<tr>
<td height="auto" colspan="2" valign="top" bgcolor="#FFFFFF" style="padding:10px;" class="copyclass" id=copy9753>
<p><script type="text/javascript"> <br />
//FX获取文件路径方法 <br />
function readFileFirefox(fileBrowser) { <br />
try { <br />
netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect"); <br />
} <br />
catch (e) { <br />
alert('无法访问本地文件，由于浏览器安全设置。为了克服这一点，请按照下列步骤操作：(1)在地址栏输入"about:config";(2) 右键点击并选择 New->Boolean; (3) 输入"signed.applets.codebase_principal_support" （不含引号）作为一个新的首选项的名称;(4) 点击OK并试着重新加载文件'); <br />
return; <br />
} <br />
var fileName=fileBrowser.value; //这一步就能得到客户端完整路径。下面的是否判断的太复杂，还有下面得到ie的也很复杂。 <br />
var file = Components.classes["@mozilla.org/file/local;1"] <br />
.createInstance(Components.interfaces.nsILocalFile); <br />
try { <br />
// Back slashes for windows <br />
file.initWithPath( fileName.replace(///g, "\") ); <br />
} <br />
catch(e) { <br />
if (e.result!=Components.results.NS_ERROR_FILE_UNRECOGNIZED_PATH) throw e; <br />
alert("File '" + fileName + "' cannot be loaded: relative paths are not allowed. Please provide an absolute path to this file."); <br />
return; <br />
} <br />
if ( file.exists() == false ) { <br />
alert("File '" + fileName + "' not found."); <br />
return; <br />
} <br />
return file.path; <br />
} <br />
//根据不同浏览器获取路径 <br />
function getvl(){ <br />
//判断浏览器 <br />
var Sys = {}; <br />
var ua = navigator.userAgent.toLowerCase(); <br />
var s; <br />
(s = ua.match(/msie ([d.]+)/)) ? Sys.ie = s[1] : <br />
(s = ua.match(/firefox/([d.]+)/)) ? Sys.firefox = s[1] : <br />
(s = ua.match(/chrome/([d.]+)/)) ? Sys.chrome = s[1] : <br />
(s = ua.match(/opera.([d.]+)/)) ? Sys.opera = s[1] : <br />
(s = ua.match(/version/([d.]+).*safari/)) ? Sys.safari = s[1] : 0; <br />
var file_url=""; <br />
if(Sys.ie<="6.0"){ <br />
//ie5.5,ie6.0 <br />
file_url = document.getElementById("file").value; <br />
}else if(Sys.ie>="7.0"){ <br />
//ie7,ie8 <br />
var file = document.getElementById("file"); <br />
file.select(); <br />
file_url = document.selection.createRange().text; <br />
}else if(Sys.firefox){ <br />
//fx <br />
//file_url = document.getElementById("file").files[0].getAsDataURL();//获取的路径为FF识别的加密字符串 <br />
file_url = readFileFirefox(document.getElementById("file")); <br />
} <br />
//alert(file_url); <br />
document.getElementById("text").innerHTML="获取文件域完整路径为："+file_url; <br />
} <br />
</script> <br />
<h1>JS获取文件域完整路径的方法，兼容不同浏览器</h1> <br />
<div id="text" style="color:#f00;"></div> <br />
<input type="file" id="file" /> <br />
<input name="" type="button" value="获取" onClick="getvl();"></p>
</td>
</tr>
</table></td>
</tr>
</table> </div>
</div>
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