JasperReport导出报表 - JasperReports教程
我们已经看到在前面的章节中，如何打印和查看的JasperReport生成的文档。在这里，我们将看到如何在其他格式，如PDF，HTML和XLS转换或导出这些报告。 Facade类net.sf.jasperreports.engine.JasperExportManager提供实现这一功能。导出方式转变JasperPrint对象（.jrprint文件）导入到不同的格式。
下面的代码（JasperReportExport.java）演示了JasperReport文档的导出过程。该JasperExportManager提供的方法将报表导出成PDF，HTML和XML。导出到使用的类net.sf.jasperreports.engine.export.JRXlsExporter的XLS格式。此代码生成以下三个文件：
sample_report.pdf
sample_report.htmll
sample_report.xls
导出为其他格式
让我们来写一个报表模板。在JRXML文件的内容 (C: oolsjasperreports-5.0.1 estjasper_report_template.jrxml) 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 xmlns="http://jasperreports.sourceforge.net/jasperreports"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports
http://jasperreports.sourceforge.net/xsd/jasperreport.xsd"
name="jasper_report_template" language="groovy" pageWidth="595"
pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20"
topMargin="20" bottomMargin="20">
<queryString>
<![CDATA[]]>
</queryString>
<field name="country" class="java.lang.String">
<fieldDescription><![CDATA[country]]></fieldDescription>
</field>
<field name="name" class="java.lang.String">
<fieldDescription><![CDATA[name]]></fieldDescription>
</field>
<columnHeader>
<band height="23">
<staticText>
<reportElement mode="Opaque" x="0" y="3" width="535"
height="15" backcolor="#70A9A9" />
<box>
<bottomPen lineWidth="1.0" lineColor="#CCCCCC" />
</box>
<textElement />
<text><![CDATA[]]> </text>
</staticText>
<staticText>
<reportElement x="414" y="3" width="121" height="15" />
<textElement textAlignment="Center"
verticalAlignment="Middle">
<font isBold="true" />
</textElement>
<text><![CDATA[Country]]></text>
</staticText>
<staticText>
<reportElement x="0" y="3" width="136" height="15" />
<textElement textAlignment="Center"
verticalAlignment="Middle">
<font isBold="true" />
</textElement>
<text><![CDATA[Name]]></text>
</staticText>
</band>
</columnHeader>
<detail>
<band height="16">
<staticText>
<reportElement mode="Opaque" x="0" y="0" width="535"
height="14" backcolor="#E5ECF9" />
<box>
<bottomPen lineWidth="0.25" lineColor="#CCCCCC" />
</box>
<textElement />
<text><![CDATA[]]> </text>
</staticText>
<textField>
<reportElement x="414" y="0" width="121" height="15" />
<textElement textAlignment="Center"
verticalAlignment="Middle">
<font size="9" />
</textElement>
<textFieldExpression class="java.lang.String">
<![CDATA[$F{country}]]>
</textFieldExpression>
</textField>
<textField>
<reportElement x="0" y="0" width="136" height="15" />
<textElement textAlignment="Center"
verticalAlignment="Middle" />
<textFieldExpression class="java.lang.String">
<![CDATA[$F{name}]]>
</textFieldExpression>
</textField>
</band>
</detail>
</jasperReport>
接着，POJO文件 C: oolsjasperreports-5.0.1 estsrccomyiibaiDataBean.java 的内容如下：
package com.yiibai;
public class DataBean {
private String name;
private String country;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getCountry() {
return country;
}
public void setCountry(String country) {
this.country = country;
}
}
文件 C: oolsjasperreports-5.0.1 estsrccomyiibaiDataBeanList.java 的内容如下：
package com.yiibai;
import java.util.ArrayList;
public class DataBeanList {
public ArrayList<DataBean> getDataBeanList() {
ArrayList<DataBean> dataBeanList = new ArrayList<DataBean>();
dataBeanList.add(produce("Manisha", "India"));
dataBeanList.add(produce("Dennis Ritchie", "USA"));
dataBeanList.add(produce("V.Anand", "India"));
dataBeanList.add(produce("Shrinath", "California"));
return dataBeanList;
}
/**
* This method returns a DataBean object,
* with name and country set in it.
*/
private DataBean produce(String name, String country) {
DataBean dataBean = new DataBean();
dataBean.setName(name);
dataBean.setCountry(country);
return dataBean;
}
}
写一个主类文件JasperReportFill.java，它从类（DataBeanList）获取java bean集合，并将其传递到Jasper 报表引擎，填补了报表模板。把它保存到目录 C: oolsjasperreports-5.0.1 estsrccomyiibai.
package com.yiibai;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRExporterParameter;
import net.sf.jasperreports.engine.JasperExportManager;
import net.sf.jasperreports.engine.JasperFillManager;
import net.sf.jasperreports.engine.data.JRBeanCollectionDataSource;
import net.sf.jasperreports.engine.export.JRXlsExporter;
public class JasperReportFill {
@SuppressWarnings("unchecked")
public static void main(String[] args) {
String sourceFileName = "c://tools/jasperreports-5.0.1/"
+ "test/jasper_report_template.jasper";
String printFileName = null;
DataBeanList DataBeanList = new DataBeanList();
ArrayList <databean>dataList = DataBeanList.getDataBeanList();
JRBeanCollectionDataSource beanColDataSource =
new JRBeanCollectionDataSource(dataList);
Map parameters = new HashMap();
try {
printFileName = JasperFillManager.fillReportToFile(sourceFileName,
parameters, beanColDataSource);
if (printFileName != null) {
/**
* 1- export to PDF
*/
JasperExportManager.exportReportToPdfFile(printFileName,
"C://sample_report.pdf");
/**
* 2- export to HTML
*/
JasperExportManager.exportReportToHtmlFile(printFileName,
"C://sample_report.htmll");
/**
* 3- export to Excel sheet
*/
JRXlsExporter exporter = new JRXlsExporter();
exporter.setParameter(JRExporterParameter.INPUT_FILE_NAME,
printFileName);
exporter.setParameter(JRExporterParameter.OUTPUT_FILE_NAME,
"C://sample_report.xls");
exporter.exportReport();
}
} catch (JRException e) {
e.printStackTrace();
}
}
}</databean>
在这里，我们已经包括了逻辑Jasper 打印文件导出到PDF，HTML和XLS格式。
生成报表
让我们用我们的常规Ant构建过程编译和执行上述文件。 build.xml文件如下图所示：
<?xml version="1.0" encoding="UTF-8"?>
<project name="JasperReportTest" default="executereport" basedir=".">
<import file="baseBuild.xml"/>
<target name="executereport" depends="compile,compilereportdesing,run">
<echo message="Im here"/>
</target>
<target name="compilereportdesing"
description="Compiles the JXML file and
produces the .jasper file.">
<taskdef name="jrc"
classname="net.sf.jasperreports.ant.JRAntCompileTask">
<classpath refid="classpath" />
</taskdef>
<jrc destdir=".">
<src>
<fileset dir=".">
<include name="*.jrxml" />
</fileset>
</src>
<classpath refid="classpath" />
</jrc>
</target>
</project>
进入命令提示符，然后转到目录C: oolsjasperreports-5.0.1 est，其中build.xml已放置。最后执行的命令 ant -Dmain-class=com.yiibai.JasperReportFill. 输出如下所示：
C: oolsjasperreports-5.0.1 est>ant -Dmain-class=com.yiibai.JasperReportFill
Buildfile: C: oolsjasperreports-5.0.1 estuild.xml
clean-sample:
[delete] Deleting directory C: oolsjasperreports-5.0.1 estclasses
[delete] Deleting: C: oolsjasperreports-5.0.1 estjasper_report_template.jasper
[delete] Deleting: C: oolsjasperreports-5.0.1 estjasper_report_template.jrprint
compile:
[mkdir] Created dir: C: oolsjasperreports-5.0.1 estclasses
[javac] C: oolsjasperreports-5.0.1 estaseBuild.xml:28:
warning: 'includeantruntime' was not set, defaulting t
[javac] Compiling 4 source files to C: oolsjasperreports-5.0.1 estclasses
compilereportdesing:
[jrc] Compiling 1 report design files.
[jrc] log4j:WARN No appenders could be found for logger
(net.sf.jasperreports.engine.xml.JRXmlDigesterFactory).
[jrc] log4j:WARN Please initialize the log4j system properly.
[jrc] log4j:WARN See http://logging.apache.org/log4j/1.2/faq.htmll#noconfig for more info.
[jrc] File : C: oolsjasperreports-5.0.1 estjasper_report_template.jrxml ... OK.
run:
[echo] Runnin class : com.yiibai.JasperReportFill
[java] log4j:WARN No appenders could be found for logger
(net.sf.jasperreports.extensions.ExtensionsEnvironment).
[java] log4j:WARN Please initialize the log4j system properly.
executereport:
[echo] Im here
BUILD SUCCESSFUL
Total time: 32 seconds
正如上面执行的结果，会发现三个文件sample_report.pdf，sample_report.htmll，sample_report.xls已生成在 C: 目录.