Java tutorial
/* * JasperReports - Free Java Reporting Library. * Copyright (C) 2001 - 2016 TIBCO Software Inc. All rights reserved. * http://www.jaspersoft.com * * Unless you have purchased a commercial license agreement from Jaspersoft, * the following license terms apply: * * This program is part of JasperReports. * * JasperReports is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * JasperReports is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with JasperReports. If not, see <http://www.gnu.org/licenses/>. */ package net.sf.jasperreports.groups.footerposition; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.security.DigestOutputStream; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; import java.util.HashMap; import java.util.Locale; import java.util.TimeZone; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.testng.annotations.BeforeClass; import org.testng.annotations.Test; import net.sf.jasperreports.engine.JRException; import net.sf.jasperreports.engine.JRParameter; 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.SimpleJasperReportsContext; import net.sf.jasperreports.engine.design.JasperDesign; import net.sf.jasperreports.engine.export.JRXmlExporter; import net.sf.jasperreports.engine.util.JRLoader; import net.sf.jasperreports.engine.xml.JRXmlLoader; import net.sf.jasperreports.export.SimpleExporterInput; import net.sf.jasperreports.export.SimpleXmlExporterOutput; /** * @author Teodor Danciu (teodord@users.sourceforge.net) */ public class FooterPositionTest { private static final Log log = LogFactory.getLog(FooterPositionTest.class); private JasperFillManager fillManager; @BeforeClass public void init() throws JRException, IOException { SimpleJasperReportsContext jasperReportsContext = new SimpleJasperReportsContext(); fillManager = JasperFillManager.getInstance(jasperReportsContext); } @Test public void keepTogetherReports() throws JRException, NoSuchAlgorithmException, IOException { HashMap<String, Object> params = new HashMap<String, Object>(); params.put(JRParameter.REPORT_LOCALE, Locale.US); params.put(JRParameter.REPORT_TIME_ZONE, TimeZone.getTimeZone("GMT")); for (int i = 1; i <= 14; i++) { String jrxmlFileName = "net/sf/jasperreports/groups/footerposition/repo/FooterPositionReport." + i + ".jrxml"; JasperReport report = compileReport(jrxmlFileName); JasperPrint print = fillManager.fill(report, params); assert !print.getPages().isEmpty(); String xmlExportDigest = xmlExportDigest(print); log.debug("Plain report got " + xmlExportDigest); String referenceXmlExportDigest = getFileDigest( "net/sf/jasperreports/groups/footerposition/repo/FooterPositionReport." + i + ".reference.jrpxml"); assert xmlExportDigest.equals(referenceXmlExportDigest); } } protected JasperReport compileReport(String jrxmlFileName) throws JRException, IOException { InputStream jrxmlInput = JRLoader.getResourceInputStream(jrxmlFileName); JasperDesign design; try { design = JRXmlLoader.load(jrxmlInput); } finally { jrxmlInput.close(); } return JasperCompileManager.compileReport(design); } protected String getFileDigest(String fileName) throws JRException, NoSuchAlgorithmException { byte[] bytes = JRLoader.loadBytesFromResource(fileName); MessageDigest messageDigest = MessageDigest.getInstance("SHA-1"); messageDigest.update(bytes); String digest = toDigestString(messageDigest); log.debug("Reference report digest is " + digest); return digest; } protected String xmlExportDigest(JasperPrint print) throws NoSuchAlgorithmException, FileNotFoundException, JRException, IOException { File outputFile = createXmlOutputFile(); log.debug("XML export output at " + outputFile.getAbsolutePath()); MessageDigest digest = MessageDigest.getInstance("SHA-1"); FileOutputStream output = new FileOutputStream(outputFile); try { DigestOutputStream out = new DigestOutputStream(output, digest); xmlExport(print, out); } finally { output.close(); } return toDigestString(digest); } protected String toDigestString(MessageDigest digest) { byte[] digestBytes = digest.digest(); StringBuilder digestString = new StringBuilder(digestBytes.length * 2); for (byte b : digestBytes) { digestString.append(String.format("%02x", b)); } return digestString.toString(); } protected File createXmlOutputFile() throws IOException { String outputDirPath = System.getProperty("xmlOutputDir"); File outputFile; if (outputDirPath == null) { outputFile = File.createTempFile("jr_tests_", ".jrpxml"); } else { File outputDir = new File(outputDirPath); outputFile = File.createTempFile("jr_tests_", ".jrpxml", outputDir); } return outputFile; } protected void xmlExport(JasperPrint print, OutputStream out) throws JRException, IOException { JRXmlExporter exporter = new JRXmlExporter(); exporter.setExporterInput(new SimpleExporterInput(print)); SimpleXmlExporterOutput output = new SimpleXmlExporterOutput(out); output.setEmbeddingImages(true); exporter.setExporterOutput(output); exporter.exportReport(); out.close(); } }