1. 编写JSP
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'upload2.jsp' starting page</title>
<script type="text/javascript“ src="js/test.js"></script>
</head>
<body>
<table>
<tr>
<td>上传用户：</td>
<td><input type="text" name="username"></td>
</tr>
<tr>
<td>上传文件：</td>
<td><input type="button" value="添加上传文件" onclick="addinput()"></td>
</tr>
<tr>
<td></td>
<td>
<div id="file"> </div>
</td>
</tr>
</table>
</body>
</html>
2. 编写JavaScript
test.js
function addinput(){
var div = document.getElementById("file");
var input = document.createElement("input");
input.type="file";
input.name="filename";
var del = document.createElement("input");
del.type="button";
del.value="删除";
del.onclick = function d(){
this.parentNode.parentNode.removeChild(this.parentNode);
}
var innerdiv = document.createElement("div");
innerdiv.appendChild(input);
innerdiv.appendChild(del);
div.appendChild(innerdiv);
}