我們已經看到在前面的章節中,如何列印和檢視的JasperReport生成的文件。在這裡,我們將看到如何在其他格式,如PDF,HTML和XLS轉換或匯出這些報告。 Facade類net.sf.jasperreports.engine.JasperExportManager提供實現這一功能。匯出方式轉變JasperPrint物件(.jrprint檔案)匯入到不同的格式。
下面的程式碼(JasperReportExport.java)演示了JasperReport文件的匯出過程。該JasperExportManager提供的方法將報表匯出成PDF,HTML和XML。匯出到使用的類net.sf.jasperreports.engine.export.JRXlsExporter的XLS格式。此程式碼生成以下三個檔案:
sample_report.pdf
sample_report.htmll
sample_report.xls
讓我們來寫一個報表模板。在JRXML檔案的內容 (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>
接著,POJO檔案 C: oolsjasperreports-5.0.1 estsrccomyiibaiDataBean.java 的內容如下:
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; } }
檔案 C: oolsjasperreports-5.0.1 estsrccomyiibaiDataBeanList.java 的內容如下:
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; } }
寫一個主類檔案JasperReportFill.java,它從類(DataBeanList)獲取java bean集合,並將其傳遞到Jasper 報表引擎,填補了報表模板。把它儲存到目錄 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(); ArrayListdataList = 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(); } } }
在這裡,我們已經包括了邏輯Jasper 列印檔案匯出到PDF,HTML和XLS格式。
讓我們用我們的常規Ant構建過程編譯和執行上述檔案。 build.xml檔案如下圖所示:
<?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>
進入命令提示字元,然後轉到目錄C: oolsjasperreports-5.0.1 est,其中build.xml已放置。最後執行的命令 ant -Dmain-class=com.yiibai.JasperReportFill. 輸出如下所示:
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
正如上面執行的結果,會發現三個檔案sample_report.pdf,sample_report.htmll,sample_report.xls已生成在 C: 目錄.