1 多文件上传
后台代码不需要修改
upload.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>多文件上传</title>
<script>
function addFileUploadDiv() {
// 1.通过 id 拿到filesDiv
var div = document.getElementById('filesDiv');
div.innerHTML += '<div>文件：<input type="file" name="file"><input type="button" value="删除" οnclick="deleteDiv(this)" ></div>'
}
function deleteDiv(input) {
// 通过父标签移除子标签
var div = document.getElementById('filesDiv');
div.removeChild(input.parentNode);
}
</script>
</head>
<body>
<form action="${pageContext.request.contextPath}/UploadServlet" method="post" enctype="multipart/form-data">
用户名：<input type="text" name="username"><br>
密码：<input type="password" name="password"><br>
<div id="filesDiv">
<div>文件：<input type="file" name="file"><input type="button" value="删除" onclick="deleteDiv(this)" ></div>
</div>
<input type="button" value="添加" onclick="addFileUploadDiv()">
<input type="submit">
</form>
</body>
</html>
