html5读取本地文件示例代码

<div class="addpic">
<button>添加图片</button>
<form>
<input id="logoimg" class="addlogo" type="file" multiple accept="image/*" name="logo">
</form>
</div>
<img id="showlogo" src="" alt="">

.addpic{
position:relative;
margin-left:100px;
width:95px;
height:30px;
}
.addlogo {
background: none repeat scroll 0 0 rgba(0, 0, 0, 0);
cursor: pointer;
font-size: 30px;
opacity: 0;
position: absolute;
right: 0;
top: 0;
z-index: 10;
}

function readFiles(evt){
var files=evt.target.files;
if(!files){
console.log("the file is invaild");
return;
}
for(var i=0, file; file=files[i]; i++){
var imgele=new Image();
var thesrc=window.URL.createObjectURL(file);
imgele.src=thesrc;
imgele.onload=function(){
$("#showlogo").attr("src",this.src);
}
}
}

$(document).ready(function(){
$("#logoimg").change(function(e){
readFiles(e)
});
});