下面小编就为大家带来一篇原生javascript实现文件异步上传的实例讲解。小编觉得挺不错的,现在就分享给大家,也给大家做个参考。一起跟随小编过来看看吧
效果图:
代码:(demo33.jsp)
<%@ page contenttype="text/html;charset=utf-8" language="java" %>
<html>
<head>
<title>demo33.jsp</title>
</head>
<body>
<label for="text">名称</label>
<input type="text" id="text" name="name"/>
<label for="file">文件</label>
<input type="file" id="file" name="file"/>
<button type="button" onclick="ajaxuploadfile()">确定</button>
</body>
<script type="text/javascript">
function ajaxuploadfile() {
var formdata = new formdata();
var xmlhttp;
if (window.xmlhttprequest) {// code for ie7+, firefox, chrome, opera, safari
xmlhttp = new xmlhttprequest();
}else {// code for ie6, ie5
xmlhttp = new activexobject("microsoft.xmlhttp");
}
xmlhttp.open("post","/data",true);
xmlhttp.setrequestheader("x-requested-with", "xmlhttprequest");
formdata.append("name",document.getelementbyid("text").value);
formdata.append("file",document.getelementbyid("file").files[0]);
xmlhttp.send(formdata);
xmlhttp.onreadystatechange=function() {
if (xmlhttp.readystate==4) {
if (xmlhttp.status==200) {
console.log("上传成功"+xmlhttp.responsetext);
}else {
console.log("上传失败"+xmlhttp.responsetext);
}
}
}
}
</script>
</html>
以上就是javascript实现文件异步上传的方法的详细内容。