Jasper报告中的错误

Question

我正在使用jasper报告从数据库中生成pdf文件。

这是我的代码。

ReportGenerator.java

package com;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.Map;

import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JasperCompileManager;
import net.sf.jasperreports.engine.JasperExportManager;
import net.sf.jasperreports.engine.JasperFillManager;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.JasperReport;
import net.sf.jasperreports.engine.design.JasperDesign;
import net.sf.jasperreports.engine.xml.JRXmlLoader;

public class ReportGenerator {

Connection conn;

public void generateReport() {

try {
Class.forName("oracle.jdbc.driver.OracleDriver");
conn = DriverManager.getConnection(
        "jdbc:oracle:thin:@localhost:SID","username","password");
System.out.println("Loading Report Designs");
InputStream input = new FileInputStream(new File("jrxml/EmployeeReport.jrxml"));
JasperDesign jasperDesign = JRXmlLoader.load(input);

System.out.println("Compiling Report Designs");
JasperReport jasperReport = JasperCompileManager.compileReport(jasperDesign);

System.out.println("Creating JasperPrint Object");
Map<String, String> parameters = new HashMap<String, String>();
parameters.put("ReportTitle", "PDF JasperReport");

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

//Exporting the report
OutputStream output = new FileOutputStream(new File("report/EmployeeReport.pdf"));

JasperExportManager.exportReportToPdfStream(jasperPrint, output);

System.out.println("Report Generation Complete");
conn.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (JRException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
}

public static void main(String[] args) {
new ReportGenerator().generateReport();
}
} 

EmployeeReport.jrxml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE jasperReport PUBLIC "//JasperReports//DTD Report Design//EN"
"jasperreport.dtd">
<jasperReport name="EmployeeReport_Demo">
<queryString>
<![CDATA[select First_Name, Last_Name from employee e]]>
</queryString>
<field name="First_Name" />
<field name="Last_Name" />
<title>
<band height="50">
<staticText>
<reportElement x="0" y="0" width="180" height="15"/>
<textElement/>
<text><![CDATA[Jasper Report - Demo]]></text>
</staticText>
</band>
</title>
<pageHeader>
<band height="30">
<staticText>
<reportElement x="0" y="0" width="69" height="24" />
<textElement verticalAlignment="Bottom" />
<text>
<![CDATA[First Name: ]]>
</text>
</staticText>
<staticText>
<reportElement x="140" y="0" width="79" height="24" />
<text>
<![CDATA[Last Name: ]]>
</text>
</staticText>
</band>
</pageHeader>
<detail>
<band height="30">
<textField>
<reportElement x="0" y="0" width="69" height="24" />
<textFieldExpression>
<![CDATA[$F{First_Name}]]>
</textFieldExpression>
</textField>
<textField>
<reportElement x="140" y="0" width="69" height="24" />
<textFieldExpression>
<![CDATA[$F{Last_Name}]]>
</textFieldExpression>
</textField>
</band>
</detail>
</jasperReport>

我正在使用此jar文件列表。

commons-beanutils-1.7.jar
commons-collections-3.1.jar
commons-digester-1.8.jar
commons-lang-2.1.jar
commons-logging-1.1.jar
iText-1.3.jar
jasperreports-1.0.3.jar
ojdbc14.jar

我在控制台中收到此错误。

Loading Report Designs
java.io.FileNotFoundException: C:\Users\dineshkumar.s\Documents\Eclipse Projects\EmployeeReport\jasperreport.dtd (The system cannot find the file specified)
    at java.io.FileInputStream.open(Native Method)
    at java.io.FileInputStream.<init>(Unknown Source)
    at java.io.FileInputStream.<init>(Unknown Source)
    at sun.net.www.protocol.file.FileURLConnection.connect(Unknown Source)
    at sun.net.www.protocol.file.FileURLConnection.getInputStream(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.setupCurrentEntity(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.startEntity(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.startDTDEntity(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLDTDScannerImpl.setInputSource(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.dispatch(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.next(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
    at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
    at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
    at org.apache.commons.digester.Digester.parse(Digester.java:1745)
    at net.sf.jasperreports.engine.xml.JRXmlLoader.loadXML(JRXmlLoader.java:236)
    at net.sf.jasperreports.engine.xml.JRXmlLoader.loadXML(JRXmlLoader.java:223)
    at net.sf.jasperreports.engine.xml.JRXmlLoader.load(JRXmlLoader.java:211)
    at com.satyamsoft.ReportGenerator.generateReport(ReportGenerator.java:38)
    at com.satyamsoft.ReportGenerator.main(ReportGenerator.java:68)

NESTED BY :
java.io.FileNotFoundException: C:\Users\dineshkumar.s\Documents\Eclipse Projects\EmployeeReport\jasperreport.dtd (The system cannot find the file specified)
    at java.io.FileInputStream.open(Native Method)
    at java.io.FileInputStream.<init>(Unknown Source)
    at java.io.FileInputStream.<init>(Unknown Source)
    at sun.net.www.protocol.file.FileURLConnection.connect(Unknown Source)
    at sun.net.www.protocol.file.FileURLConnection.getInputStream(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.setupCurrentEntity(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.startEntity(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.startDTDEntity(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLDTDScannerImpl.setInputSource(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.dispatch(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.next(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
    at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
    at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
    at org.apache.commons.digester.Digester.parse(Digester.java:1745)
    at net.sf.jasperreports.engine.xml.JRXmlLoader.loadXML(JRXmlLoader.java:236)
    at net.sf.jasperreports.engine.xml.JRXmlLoader.loadXML(JRXmlLoader.java:223)
    at net.sf.jasperreports.engine.xml.JRXmlLoader.load(JRXmlLoader.java:211)
    at com.satyamsoft.ReportGenerator.generateReport(ReportGenerator.java:38)
    at com.satyamsoft.ReportGenerator.main(ReportGenerator.java:68)

NESTED BY :
net.sf.jasperreports.engine.JRException: C:\Users\dineshkumar.s\Documents\Eclipse Projects\EmployeeReport\jasperreport.dtd (The system cannot find the file specified)
    at net.sf.jasperreports.engine.xml.JRXmlLoader.loadXML(JRXmlLoader.java:244)
    at net.sf.jasperreports.engine.xml.JRXmlLoader.loadXML(JRXmlLoader.java:223)
    at net.sf.jasperreports.engine.xml.JRXmlLoader.load(JRXmlLoader.java:211)
    at com.satyamsoft.ReportGenerator.generateReport(ReportGenerator.java:38)
    at com.satyamsoft.ReportGenerator.main(ReportGenerator.java:68)
Caused by: java.io.FileNotFoundException: C:\Users\dineshkumar.s\Documents\Eclipse Projects\EmployeeReport\jasperreport.dtd (The system cannot find the file specified)
    at java.io.FileInputStream.open(Native Method)
    at java.io.FileInputStream.<init>(Unknown Source)
    at java.io.FileInputStream.<init>(Unknown Source)
    at sun.net.www.protocol.file.FileURLConnection.connect(Unknown Source)
    at sun.net.www.protocol.file.FileURLConnection.getInputStream(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.setupCurrentEntity(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.startEntity(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.startDTDEntity(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLDTDScannerImpl.setInputSource(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.dispatch(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.next(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
    at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
    at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
    at org.apache.commons.digester.Digester.parse(Digester.java:1745)
    at net.sf.jasperreports.engine.xml.JRXmlLoader.loadXML(JRXmlLoader.java:236)
    ... 4 more

我在项目中添加了jasperreport.dtd文件。 请帮助我解决此问题。

Answer 1

有时错误是由于路径中的空格引起的，因此，如果您手动检查jasperreport.dtd文件在提到的路径中是否存在，请尝试使用不带空格的Eclipse工作区（即，将Eclipse Projects更改为EclipseProjects ）

Answer 2

ClassLoader loader = getClass().getClassLoader();

InputStream reportName = new FileInputStream(newFile(
            loader.getResource("reportes/ReporteCalendarizado.jrxml").getFile()));
            JasperDesign jasperDesign = JRXmlLoader.load(reportName);