<iframe id="fileDownFrame" src="" style="display:none; visibility:hidden;"></iframe>
<input type=‘button‘value="ajax下载" onclick=‘$("#fileDownFrame").attr("src", "PrintContractSign?id=1");‘>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<script type="text/javascript" src="jquery-1.4.2.js"></script>
</head>
<body>
<a href="http地址、或者Action地址 Action？id=-1">a标签下载</a>
<input type=‘button‘value="修改地址栏下载"onclick="window.location.href = ‘http地址、或者Action地址 Action？id=-1‘">
<input type=‘button‘ value="打开新窗口下载" onclick="window.open(‘http地址、或者Action地址 Action？id=-1‘)">
<iframe id="fileDownFrame" src="" style="display:none; visibility:hidden;"></iframe>
<input type=‘button‘value="ajax下载"onclick=‘$("#fileDownFrame").attr("src", "http地址、或者Action地址 Action？id=-1");‘>
</body>
</html>
点击 下载 pdf
原文：http://www.cnblogs.com/wangcq/p/4107832.html
