您的位置：首页 > 编程语言 > Java开发

ireport学习笔记---java应用程序中使用报表篇

2013-10-25 13:07 453 查看

在正式开始前，我在上一篇的报表里面加入了一个参数id，如下：

当我们运行报表后，就会生成一个.jasper文件，是.jrxml编译后的文件。我这里的文件是test.jasper

1. 在eclipse里新建一个web工程，工程里面要导入jasperreports- 3.1.2.jar，sqljdbc.jar这两个包

2. 建议一个输入的界面，用户输入用户的id。-------index.html文件：

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>index.html</title>

<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="this is my page">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">



</head>

<body>
<form action="ireport_html.jsp" id="myform" method="post">
用户ID：
<input name="userId" type="text" width="80">
<br />
<input name="button" type="submit" value="确定" />
</form>
</body>
</html>

3. 建议上一个页面提交后的转向页面---ireport_html.jsp

<%@ page language="java" pageEncoding="UTF-8"%>
<%@ page import="net.sf.jasperreports.engine.JasperRunManager"%>
<%@ page import="javax.naming.*"%>
<%@ page import="java.sql.*"%>
<%@ page import="java.util.*"%>
<%@ page import="java.io.*"%>
<%@ page import="com.microsoft.sqlserver.jdbc.SQLServerDriver"%>
<%@ page import="net.sf.jasperreports.engine.JasperPrint"%>
<%@ page import="net.sf.jasperreports.engine.JasperFillManager"%>
<%@ page import="net.sf.jasperreports.engine.JREmptyDataSource"%>
<%@ page import="net.sf.jasperreports.engine.export.JRXlsExporter"%>
<%@ page import="net.sf.jasperreports.engine.JasperReport"%>
<%@ page import="net.sf.jasperreports.engine.util.JRLoader"%>
<%@ page import="net.sf.jasperreports.engine.export.JRHtmlExporter"%>
<%@ page import="net.sf.jasperreports.engine.JRExporterParameter"%>
<%@ page import="net.sf.jasperreports.engine.export.JRHtmlExporterParameter"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html:html lang="true">
<head>
<html:base />

<title>getData.jsp</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">

</head>
<body>
<%
String id = null;
Connection con = null;
String CLASSFORNAME = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
String SERVANDDB = "jdbc:sqlserver://localhost:1433;DatabaseName=test";
String USER = "sa";
String PWD = "123pk";
try {
Class.forName(CLASSFORNAME);
con = DriverManager.getConnection(SERVANDDB, USER, PWD);
} catch (Exception e) {
e.printStackTrace();
}
try {
File reportFile = new File(application
.getRealPath("report/test.jasper"));
JasperReport jasperReport = (JasperReport)JRLoader.loadObject(reportFile.getPath());
Map parameters = new HashMap();
String userId = request.getParameter("userId");
parameters.put("id", userId);
JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, parameters, con);
JRHtmlExporter exporter = new JRHtmlExporter();
StringBuffer sbuffer = new StringBuffer();

Map imagesMap = new HashMap();
session.setAttribute("IMAGES_MAP", imagesMap);

exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
exporter.setParameter(JRExporterParameter.OUTPUT_WRITER, out);

exporter.setParameter(JRHtmlExporterParameter.IS_USING_IMAGES_TO_ALIGN, Boolean.FALSE);
exporter.exportReport();
//out.flush();
con.close();
} catch (Exception ex) {
out.print("出现例外，信息是:" + ex.getMessage());
ex.printStackTrace();
}
%>
</body>
</html:html>

4.发布运行程序，在页面里面输入用户的id,然后报表程序就显示出来了

内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理

标签：

相关文章推荐

新的分享

章节导航