iReport+jasperReport之JDBC数据源
iReport画出来的报表可以满足我们大部分的需要,所以采用iReport 编辑jrxml文件是我们的首选啦!当然掌握jrxml文件的结构也是必须的。
采用JDBC数据源必须有数据库支持啊!我们新建一个test表,其中有pid、name、sex、password、department、age字段,为了方便期间我们定义这些字段全部为String类型。
在iReport中新建一报表,报表有title、pageHeader、columnHeader、detail、columnFooter、pageFooter、lastPageFooter、summary等部分,被成为Report section
title:顾名思义是指报表的标题哦,它会显示在报表的最上面,如果有多页只会出现在第一页的最上面。pageHeader:每页的标题,如果有多页每页的开始都会显示此部分内容。
columnHeader:显示报表的列头不经常使用。
detail:这个就不用说了吧!
有header就会出现footer啦!lastPageFooter只会出现在最后一页。summay会出现在每一页数据上,主要是为了展示一些统计信息,比如当前的时间,页数信息啦!
新建一parameter

此参数可作为报表的标题使用,我们在程序中动态的传递给报表。
document structure---》parameter里找到reportTitle参数拖至title区域,右击编辑reportTitle域的属性,在font选项里找到Markup设置为HTML,TextField选项里设置Text Field Expreesion为
"
<
font
color
='blue'
size
='5'>"+$P{reportTitle}+""
下来就是设置报表的Field字段了,不需要我们一个个的新建那些字段啦!
选择Data--->Report Query在Report Query选项里选择Query Language为SQL,写入SqL语句
select
*
from
test
order
by
pid
DESC
这时所有的field会出现在下面(SQL是正确的)
关闭对话框在document structure---》field中就会出现我们需要的field,之后拖到相应的位置,关于怎么美化报表这个本人也不是很懂哦!
如果需要显示一下当前的页数信息也可以自己托动Variables里的PAGE_NUMBER完成页数的显示。完整的jrxml文件如下:
xml version="1.0" encoding="UTF-8"
?>
DOCTYPE jasperReport PUBLIC "//JasperReports//DTD Report Design//EN" "http://jasperreports.sourceforge.net/dtds/jasperreport.dtd"
>
<
jasperReport
name
="Person"
columnCount
="1"
printOrder
="Vertical"
orientation
="Portrait"
pageWidth
="595"
pageHeight
="842"
columnWidth
="535"
columnSpacing
="0"
leftMargin
="30"
rightMargin
="30"
topMargin
="20"
bottomMargin
="20"
whenNoDataType
="NoPages"
isTitleNewPage
="false"
isSummaryNewPage
="false"
>
<
property
name
="ireport.scriptlethandling"
value
="0"
/>
<
property
name
="ireport.encoding"
value
="UTF-8"
/>
<
import
value
="java.util.*"
/>
<
import
value
="net.sf.jasperreports.engine.*"
/>
<
import
value
="net.sf.jasperreports.engine.data.*"
/>

<
parameter
name
="reportTitle"
isForPrompting
="true"
class
="java.lang.String"
/>
<
queryString
>
select * from test order by pid DESC
]]>
queryString
>

<
field
name
="pid"
class
="java.lang.String"
/>
<
field
name
="name"
class
="java.lang.String"
/>
<
field
name
="sex"
class
="java.lang.String"
/>
<
field
name
="password"
class
="java.lang.String"
/>
<
field
name
="department"
class
="java.lang.String"
/>
<
field
name
="age"
class
="java.lang.String"
/>

<
background
>
<
band
height
="6"
isSplitAllowed
="true"
>
band
>
background
>
<
title
>
<
band
height
="29"
isSplitAllowed
="true"
>
<
textField
isStretchWithOverflow
="false"
isBlankWhenNull
="false"
evaluationTime
="Now"
hyperlinkType
="None"
hyperlinkTarget
="Self"
>
<
reportElement
x
="138"
y
="0"
width
="258"
height
="29"
key
="textField"
/>
<
box
>
box
>
<
textElement
textAlignment
="Center"
verticalAlignment
="Middle"
markup
="html"
>
<
font
pdfFontName
="Helvetica-Bold"
isBold
="true"
/>
textElement
>
<
textFieldExpression
class
="java.lang.String"
>
""+$P{reportTitle}+""
]]>
textFieldExpression
>
textField
>
band
>
title
>
<
pageHeader
>
<
band
height
="0"
isSplitAllowed
="true"
>
band
>
pageHeader
>
<
columnHeader
>
<
band
height
="0"
isSplitAllowed
="true"
>
band
>
columnHeader
>
<
detail
>
<
band
height
="22"
isSplitAllowed
="true"
>
<
textField
isStretchWithOverflow
="false"
isBlankWhenNull
="false"
evaluationTime
="Now"
hyperlinkType
="None"
hyperlinkTarget
="Self"
>
<
reportElement
x
="0"
y
="0"
width
="100"
height
="18"
key
="textField"
/>
<
box
>
box
>
<
textElement
verticalAlignment
="Top"
>
<
font
/>
textElement
>
<
textFieldExpression
class
="java.lang.String"
>
$F{pid}
]]>
textFieldExpression
>
textField
>
<
textField
isStretchWithOverflow
="false"
isBlankWhenNull
="false"
evaluationTime
="Now"
hyperlinkType
="None"
hyperlinkTarget
="Self"
>
<
reportElement
x
="100"
y
="0"
width
="93"
height
="18"
key
="textField"
/>
<
box
>
box
>
<
textElement
verticalAlignment
="Top"
>
<
font
/>
textElement
>
<
textFieldExpression
class
="java.lang.String"
>
$F{name}
]]>
textFieldExpression
>
textField
>
<
textField
isStretchWithOverflow
="false"
isBlankWhenNull
="false"
evaluationTime
="Now"
hyperlinkType
="None"
hyperlinkTarget
="Self"
>
<
reportElement
x
="193"
y
="0"
width
="58"
height
="18"
key
="textField"
/>
<
box
>
box
>
<
textElement
verticalAlignment
="Top"
>
<
font
/>
textElement
>
<
textFieldExpression
class
="java.lang.String"
>
$F{sex}
]]>
textFieldExpression
>
textField
>
<
textField
isStretchWithOverflow
="false"
isBlankWhenNull
="false"
evaluationTime
="Now"
hyperlinkType
="None"
hyperlinkTarget
="Self"
>
<
reportElement
x
="251"
y
="0"
width
="100"
height
="18"
key
="textField"
/>
<
box
>
box
>
<
textElement
verticalAlignment
="Top"
>
<
font
/>
textElement
>
<
textFieldExpression
class
="java.lang.String"
>
$F{password}
]]>
textFieldExpression
>
textField
>
<
textField
isStretchWithOverflow
="false"
isBlankWhenNull
="false"
evaluationTime
="Now"
hyperlinkType
="None"
hyperlinkTarget
="Self"
>
<
reportElement
x
="351"
y
="0"
width
="100"
height
="18"
key
="textField"
/>
<
box
>
box
>
<
textElement
verticalAlignment
="Top"
>
<
font
/>
textElement
>
<
textFieldExpression
class
="java.lang.String"
>
$F{department}
]]>
textFieldExpression
>
textField
>
<
textField
isStretchWithOverflow
="false"
pattern
=""
isBlankWhenNull
="false"
evaluationTime
="Now"
hyperlinkType
="None"
hyperlinkTarget
="Self"
>
<
reportElement
x
="451"
y
="0"
width
="84"
height
="18"
key
="textField"
/>
<
box
>
box
>
<
textElement
verticalAlignment
="Top"
>
<
font
/>
textElement
>
<
textFieldExpression
class
="java.lang.String"
>
$F{age}
]]>
textFieldExpression
>
textField
>
<
line
direction
="TopDown"
>
<
reportElement
x
="0"
y
="17"
width
="535"
height
="1"
key
="line-1"
/>
<
graphicElement
stretchType
="NoStretch"
/>
line
>
band
>
detail
>
<
columnFooter
>
<
band
height
="0"
isSplitAllowed
="true"
>
band
>
columnFooter
>
<
pageFooter
>
<
band
height
="24"
isSplitAllowed
="true"
>
<
textField
isStretchWithOverflow
="false"
isBlankWhenNull
="false"
evaluationTime
="Now"
hyperlinkType
="None"
hyperlinkTarget
="Self"
>
<
reportElement
x
="387"
y
="5"
width
="22"
height
="18"
key
="textField"
/>
<
box
>
box
>
<
textElement
textAlignment
="Center"
verticalAlignment
="Middle"
>
<
font
/>
textElement
>
<
textFieldExpression
class
="java.lang.Integer"
>
$V{PAGE_NUMBER}
]]>
textFieldExpression
>
textField
>
<
staticText
>
<
reportElement
x
="373"
y
="5"
width
="14"
height
="17"
key
="staticText-2"
/>
<
box
>
box
>
<
textElement
textAlignment
="Center"
verticalAlignment
="Middle"
>
<
font
pdfFontName
="Helvetica-Bold"
size
="12"
isBold
="true"
/>
textElement
>
<
text
>
第
]]>
text
>
staticText
>
<
staticText
>
<
reportElement
x
="409"
y
="5"
width
="14"
height
="17"
key
="staticText-3"
/>
<
box
>
box
>
<
textElement
textAlignment
="Center"
verticalAlignment
="Middle"
>
<
font
pdfFontName
="Helvetica-Bold"
size
="12"
isBold
="true"
/>
textElement
>
<
text
>
页
]]>
text
>
staticText
>
band
>
pageFooter
>
<
summary
>
<
band
height
="0"
isSplitAllowed
="true"
>
band
>
summary
>
jasperReport
>
我们可以直接使用ireport查看预览效果,但是大部分我们是在应用程序中使用的哦!我们看看我们怎么让这个jrxml模板文件工作呢,
File file
=
new
File(
"
Person.jrxml
"
);
InputStream in
=
new
FileInputStream(file);
//
编译报表 jasperReport =
jasperReport
=
JasperCompileManager.compileReport(in);
编译文件是很耗时的工作,通常这个由iReport去做我们使用jasper文件即可,
jasperReport
=
(JasperReport) JRLoader
.loadObject(
"
D:\\workspace\\Person.jasper
"
);
产生了JasperReport对象下来就是要填充数据了,采用JDBC方式我们需要一个打开的connection(数据库连接),
还有报表需要的parameter:
public
HashMap getMap()
{

HashMap map = new HashMap();
map.put("reportTitle", "laoshulin");
return map;
}
jasperPrint
=
JasperFillManager
.fillReport(jasperReport, getMap, getConn());
针对jasperPrint对象JasperReport有很多的API可以提供各种方式的预览或是生成文件
我只说说JasperViewer吧!其它的看看api或是google一下就知道了
JasperViewer jasperViewer
=
new
JasperViewer(jasperPrint);
JasperViewer 继承自JFrame类,
jasperViewer.setVisible(
true
);
这样就可以预览报表了,
JRViewer这个类继承Jpanel,我们可以在web中使用它,后面介绍客户端打印时再详细介绍。
JDBC数据源很简单主要是SQL的功底,但是它是最基础的,网上一大堆这方面的介绍哦,可以参考别人的多看看哦,我写的这些都有点语无伦次了,主要是我自己不怎么写东西,多以代码的形式留给自己了,现在写出来和大家交流,当时做这个的时候找了好多的文章没有一篇写的深刻的,大多都是copy的。
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import net.sf.jasperreports.engine.JRDataSource;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JasperCompileManager;
import net.sf.jasperreports.engine.JasperFillManager;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.JasperReport;
import net.sf.jasperreports.engine.data.JRMapCollectionDataSource;
import net.sf.jasperreports.view.JasperViewer;
/**
*
*
C/S架构 JasperReport 的简单使用
*
* 创建日期 2013-4-22
* @author longgangbai
* @version $Revision$ 2013-4-22
* @since 3.0.0
*/
public class Main {
public static JRDataSource createReportDataSource() {
JRDataSource dataSource;
Collection