java web jasperreport+ireport 实现多记录自动分页打印

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本文介绍了一个Java Web应用程序中如何利用JasperReport和iReport实现多记录的自动分页打印。通过创建printByJasperDemo.jsp页面，展示了如何加载jasper报告文件，设置参数，建立数据库连接，填充报告，以及使用JRHtmlExporter进行HTML导出，并利用CSS样式实现打印时的分页效果。

创建一个printByJasperDemo.jsp，代码如下：

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ page
import="java.io.*,net.sf.jasperreports.engine.*,net.sf.jasperreports.engine.util.*,java.util.*,java.sql.*,net.sf.jasperreports.engine.export.*"%>
<script type="text/javascript">
function printView() {
window.print();
}
</script>

<style media="print" type="text/css">
.Noprint {
display: none;
}
.PageNext {
page-break-after: always;
}
</style>
<button onclick="printView()" class="Noprint">打印预览</button>
<%
File reportFile = new File(
application.getRealPath("jasper/elecPayPrint.jasper"));
JasperReport jasperReport = (JasperReport) JRLoader
.loadObject(reportFile.getPath());
//Map里面可以封装jasper中用到的参数
Map parameters = new HashMap();
parameters.put("make_code", "D_20140116_0053");
parameters.put("make_date", "2012-12-12");
parameters.put("make_man", "雷宏");
parameters.put("area_name", "长沙");

//数据库连接
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection conn = DriverManager.getConnection(
"jdbc:oracle:thin:@10.46.1.117:1521:property", "hnproperty", "property123");

JasperPrint jasperPrint = JasperFillManager.fillReport(
jasperReport, parameters, conn);

JRHtmlExporter exporter = new JRHtmlExporter();

exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);//待export的japserPrint
exporter.setParameter(JRExporterParameter.OUTPUT_WRITER, out);//输出writer
exporter.setParameter(
JRHtmlExporterParameter.IS_USING_IMAGES_TO_ALIGN,//去掉图片填充
Boolean.FALSE);
//打印分页的关键代码,结合了上面的样式
exporter.setParameter(JRHtmlExporterParameter.BETWEEN_PAGES_HTML,
"<div class='PageNext'></div>");

exporter.setParameter(
JRHtmlExporterParameter.IS_REMOVE_EMPTY_SPACE_BETWEEN_ROWS,
Boolean.TRUE);

exporter.setParameter(JRHtmlExporterParameter.SIZE_UNIT,
JRHtmlExporterParameter.SIZE_UNIT_POINT);
exporter.setParameter(JRHtmlExporterParameter.SIZE_UNIT,
JRHtmlExporterParameter.SIZE_UNIT_PIXEL);

exporter.exportReport();

out.flush();
conn.close();
%>