springMVC动态生成PDF并下载

依据原来的的pdf，我今天又用以前的SpringMVC重新写了一份。

学习就是要活学活用，请不要死板！！！

原文：https://blog.youkuaiyun.com/weixin_40989555/article/details/80742607

必要的maven依赖

		<!-- pdf打印 -->
		<dependency>
		    <groupId>com.itextpdf</groupId>
		    <artifactId>itextpdf</artifactId>
		    <version>5.5.10</version>
		</dependency>
		<dependency>
		    <groupId>com.itextpdf</groupId>
		    <artifactId>itext-asian</artifactId>
		    <version>5.2.0</version>
		</dependency>

页面部分

<%--==========查询的from表单：===========--%>
<div class="input-group" style="margin-left:50px;">
	<form id="searchForm" name="searchForm" action="${pageContext.request.contextPath}/notice/searchNotice" method="post">
		<span style="height: 35px;font-size: 18px">消息内容：</span><input id="searchContent" name="content" type="text" class="input_area" value="${content}">  
		<span style="height: 35px;font-size: 18px">起始日期：</span><input id="startDate" name="startDate" style="width:200px" type="text" class="input_area" value="${startDate}">
		<span style="height: 35px;font-size: 18px">结束日期：</span><input id="endDate" name="endDate" style="width:200px" type="text" class="input_area" value="${endDate}">
   		<button class="btn btn-info btn-sm" type="submit"><i class="glyphicon glyphicon-search"></i>搜索</button>
   		<button class="btn btn-danger btn-sm" onclick="jsClearForm(document.forms[0]);" type="button"><i class="glyphicon glyphicon-refresh"></i>重置</button>
	</form>
	<a onclick="downloadPdf()" target="_self"  class="btn btn-info btn-sm" data-toggle="modal" >导出pdf</a>
</div>


<%--==========公用模态框============--%>
<div class="modal fade" id="commonModal" role="dialog"