方法一：
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>测试页面</title>
<script type="text/javascript">
//图片预览功能
function previewImage(file, imgNum)
{
var MAXWIDTH = 200;
var MAXHEIGHT = 200;
var div = document.getElementById(‘preview‘ + imgNum);
if (file.files && file.files[0])
{
div.innerHTML = ‘<img id=imghead‘ + imgNum + ‘>‘;
var img = document.getElementById(‘imghead‘ + imgNum + ‘‘);
img.onload = function() {
var rect = clacImgZoomParam(MAXWIDTH, MAXHEIGHT, img.offsetWidth, img.offsetHeight);
img.width = rect.width;
img.height = rect.height;
// img.style.marginLeft = rect.left+‘px‘;
img.style.marginTop = rect.top + ‘px‘;
}
var reader = new FileReader();
reader.onload = function(evt) {
img.src = evt.target.result;
}
reader.readAsDataURL(file.files[0]);
}
else //
{
var sFilter = ‘filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale,src="‘;
file.select();
var src = document.selection.createRange().text;
div.innerHTML = ‘<img id=imghead‘ + imgNum + ‘>‘;
var img = document.getElementById(‘imghead2‘);
img.filters.item(‘DXImageTransform.Microsoft.AlphaImageLoader‘).src = src;
var rect = clacImgZoomParam(MAXWIDTH, MAXHEIGHT, img.offsetWidth, img.offsetHeight);
status = (‘rect:‘ + rect.top + ‘,‘ + rect.left + ‘,‘ + rect.width + ‘,‘ + rect.height);
div.innerHTML = "<div id=divhead" + imgNum + " style=‘width:" + rect.width + "px;height:" + rect.height + "px;margin-top:" + rect.top + "px;" + sFilter + src + "\"‘></div>";
}
}
function clacImgZoomParam(maxWidth, maxHeight, width, height) {
var param = {top: 0, left: 0, width: width, height: height};
if (width > maxWidth || height > maxHeight)
{
rateWidth = width / maxWidth;
rateHeight = height / maxHeight;
if (rateWidth > rateHeight)
{
param.width = maxWidth;
param.height = Math.round(height / rateWidth);
} else
{
param.width = Math.round(width / rateHeight);
param.height = maxHeight;
}
}
param.left = Math.round((maxWidth - param.width) / 2);
param.top = Math.round((maxHeight - param.height) / 2);
return param;
}
</script>
</head>
<body>
<div class="yanzRight">
<input type="file" value="打开摄像头" title="摄像头" capture="camera" accept="image/*" onchange="previewImage(this, 5)" id="cameraInput">
<input style="margin-top:5px;float: left;" id="st18" name="evidence" onchange="previewImage(this, 5)" type="file"/>
<span class="dui" id="imgOrder_dui" style="display: none;"></span>
</div>
<div id="preview5" style="margin-left:150px;clear:both; padding-top:15px;">
<img src="" alt="" id="imghead5" height="200" width="200" style="display:none;"/>
</div>
</body>
</html>
方法二：
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>测试页面</title>
<script type="text/javascript">
//下面用于多图片上传预览功能
function setImagePreviews(avalue) {
var docObj = document.getElementById("doc");
var dd = document.getElementById("dd");
dd.innerHTML = "";
var fileList = docObj.files;
for (var i = 0; i < fileList.length; i++) {
dd.innerHTML += "<div style=‘float:left‘ > <img id=‘img" + i + "‘ /> </div>";
var imgObjPreview = document.getElementById("img" + i);
if (docObj.files && docObj.files[i]) {
//火狐下，直接设img属性
imgObjPreview.style.display = ‘block‘;
imgObjPreview.style.width = ‘150px‘;
imgObjPreview.style.height = ‘180px‘;
//imgObjPreview.src = docObj.files[0].getAsDataURL();
//火狐7以上版本不能用上面的getAsDataURL()方式获取，需要一下方式
imgObjPreview.src = window.URL.createObjectURL(docObj.files[i]);
}
else {
//IE下，使用滤镜
docObj.select();
var imgSrc = document.selection.createRange().text;
alert(imgSrc)
var localImagId = document.getElementById("img" + i);
//必须设置初始大小
localImagId.style.width = "150px";
localImagId.style.height = "180px";
//图片异常的捕捉，防止用户修改后缀来伪造图片
try {
localImagId.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale)";
localImagId.filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = imgSrc;
}
catch (e) {
alert("您上传的图片格式不正确，请重新选择!");
return false;
}
imgObjPreview.style.display = ‘none‘;
document.selection.empty();
}
}
return true;
}
</script>
</head>
<body>
<div style="margin :0px auto; width:990px;">
<input type="file" name="file" id="doc" multiple="multiple" style="width:150px;" onchange="javascript:setImagePreviews();" accept="image/*" />
<div id="dd" style=" width:990px;"></div>
</div>
</body>
</html>
时间： 2024-10-12 08:41:52