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BAEL-1203 Apache POI PowerPoint (#3090) 

* Added Apache-POI PowerPoint

* Adjusted format + retrieve all placeholder
This commit is contained in:
araknoid 2017-11-29 20:49:08 +01:00 committed by Predrag Maric
parent da97e4c5ac
commit 064ea79490
2 changed files with 301 additions and 0 deletions
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apache-poi/src/main/java/com/baeldung/poi/powerpoint/PowerPointHelper.java Normal file
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package com.baeldung.poi.powerpoint;
import org.apache.poi.sl.usermodel.AutoNumberingScheme;
import org.apache.poi.sl.usermodel.PictureData;
import org.apache.poi.sl.usermodel.TableCell;
import org.apache.poi.sl.usermodel.TextParagraph;
import org.apache.poi.util.IOUtils;
import org.apache.poi.xslf.usermodel.*;
import java.awt.*;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
/**
* Helper class for the PowerPoint presentation creation
*/
public class PowerPointHelper {
/**
* Read an existing presentation
*
* @param fileLocation
* File location of the presentation
* @return instance of {@link XMLSlideShow}
* @throws IOException
*/
public XMLSlideShow readingExistingSlideShow(String fileLocation) throws IOException {
return new XMLSlideShow(new FileInputStream(fileLocation));
}
/**
* Create a sample presentation
*
* @param fileLocation
* File location of the presentation
* @throws IOException
*/
public void createPresentation(String fileLocation) throws IOException {
// Create presentation
XMLSlideShow ppt = new XMLSlideShow();
XSLFSlideMaster defaultMaster = ppt.getSlideMasters().get(0);
// Retriving the slide layout
XSLFSlideLayout layout = defaultMaster.getLayout(SlideLayout.TITLE_ONLY);
// Creating the 1st slide
XSLFSlide slide1 = ppt.createSlide(layout);
XSLFTextShape title = slide1.getPlaceholder(0);
// Clearing text to remove the predefined one in the template
title.clearText();
XSLFTextParagraph p = title.addNewTextParagraph();
XSLFTextRun r1 = p.addNewTextRun();
r1.setText("Baeldung");
r1.setFontColor(new Color(78, 147, 89));
r1.setFontSize(48.);
// Add Image
ClassLoader classLoader = getClass().getClassLoader();
byte[] pictureData = IOUtils.toByteArray(new FileInputStream(classLoader.getResource("logo-leaf.png").getFile()));
XSLFPictureData pd = ppt.addPicture(pictureData, PictureData.PictureType.PNG);
XSLFPictureShape picture = slide1.createPicture(pd);
picture.setAnchor(new Rectangle(320, 230, 100, 92));
// Creating 2nd slide
layout = defaultMaster.getLayout(SlideLayout.TITLE_AND_CONTENT);
XSLFSlide slide2 = ppt.createSlide(layout);
// setting the tile
title = slide2.getPlaceholder(0);
title.clearText();
XSLFTextRun r = title.addNewTextParagraph().addNewTextRun();
r.setText("Baeldung");
// Adding the link
XSLFHyperlink link = r.createHyperlink();
link.setAddress("http://www.baeldung.com");
// setting the content
XSLFTextShape content = slide2.getPlaceholder(1);
content.clearText(); // unset any existing text
content.addNewTextParagraph().addNewTextRun().setText("First paragraph");
content.addNewTextParagraph().addNewTextRun().setText("Second paragraph");
content.addNewTextParagraph().addNewTextRun().setText("Third paragraph");
// Creating 3rd slide - List
layout = defaultMaster.getLayout(SlideLayout.TITLE_AND_CONTENT);
XSLFSlide slide3 = ppt.createSlide(layout);
title = slide3.getPlaceholder(0);
title.clearText();
r = title.addNewTextParagraph().addNewTextRun();
r.setText("Lists");
content = slide3.getPlaceholder(1);
content.clearText();
XSLFTextParagraph p1 = content.addNewTextParagraph();
p1.setIndentLevel(0);
p1.setBullet(true);
r1 = p1.addNewTextRun();
r1.setText("Bullet");
// the next three paragraphs form an auto-numbered list
XSLFTextParagraph p2 = content.addNewTextParagraph();
p2.setBulletAutoNumber(AutoNumberingScheme.alphaLcParenRight, 1);
p2.setIndentLevel(1);
XSLFTextRun r2 = p2.addNewTextRun();
r2.setText("Numbered List Item - 1");
// Creating 4th slide
XSLFSlide slide4 = ppt.createSlide();
createTable(slide4);
// Save presentation
FileOutputStream out = new FileOutputStream(fileLocation);
ppt.write(out);
out.close();
// Closing presentation
ppt.close();
}
/**
* Delete a slide from the presentation
*
* @param ppt
* The presentation
* @param slideNumber
* The number of the slide to be deleted (0-based)
*/
public void deleteSlide(XMLSlideShow ppt, int slideNumber) {
ppt.removeSlide(slideNumber);
}
/**
* Re-order the slides inside a presentation
*
* @param ppt
* The presentation
* @param slideNumber
* The number of the slide to move
* @param newSlideNumber
* The new position of the slide (0-base)
*/
public void reorderSlide(XMLSlideShow ppt, int slideNumber, int newSlideNumber) {
List<XSLFSlide> slides = ppt.getSlides();
XSLFSlide secondSlide = slides.get(slideNumber);
ppt.setSlideOrder(secondSlide, newSlideNumber);
}
/**
* Retrieve the placeholder inside a slide
*
* @param slide
* The slide
* @return List of placeholder inside a slide
*/
public List<XSLFShape> retrieveTemplatePlaceholders(XSLFSlide slide) {
List<XSLFShape> placeholders = new ArrayList<>();
for (XSLFShape shape : slide.getShapes()) {
if (shape instanceof XSLFAutoShape) {
placeholders.add(shape);
}
}
return placeholders;
}
/**
* Create a table
*
* @param slide
* Slide
*/
private void createTable(XSLFSlide slide) {
XSLFTable tbl = slide.createTable();
tbl.setAnchor(new Rectangle(50, 50, 450, 300));
int numColumns = 3;
int numRows = 5;
// header
XSLFTableRow headerRow = tbl.addRow();
headerRow.setHeight(50);
for (int i = 0; i < numColumns; i++) {
XSLFTableCell th = headerRow.addCell();
XSLFTextParagraph p = th.addNewTextParagraph();
p.setTextAlign(TextParagraph.TextAlign.CENTER);
XSLFTextRun r = p.addNewTextRun();
r.setText("Header " + (i + 1));
r.setBold(true);
r.setFontColor(Color.white);
th.setFillColor(new Color(79, 129, 189));
th.setBorderWidth(TableCell.BorderEdge.bottom, 2.0);
th.setBorderColor(TableCell.BorderEdge.bottom, Color.white);
// all columns are equally sized
tbl.setColumnWidth(i, 150);
}
// data
for (int rownum = 0; rownum < numRows; rownum++) {
XSLFTableRow tr = tbl.addRow();
tr.setHeight(50);
for (int i = 0; i < numColumns; i++) {
XSLFTableCell cell = tr.addCell();
XSLFTextParagraph p = cell.addNewTextParagraph();
XSLFTextRun r = p.addNewTextRun();
r.setText("Cell " + (i * rownum + 1));
if (rownum % 2 == 0) {
cell.setFillColor(new Color(208, 216, 232));
} else {
cell.setFillColor(new Color(233, 247, 244));
}
}
}
}
}

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apache-poi/src/test/java/com/baeldung/poi/powerpoint/PowerPointIntegrationTest.java Normal file
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package com.baeldung.poi.powerpoint;
import org.apache.poi.xslf.usermodel.XMLSlideShow;
import org.apache.poi.xslf.usermodel.XSLFShape;
import org.apache.poi.xslf.usermodel.XSLFSlide;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import java.io.File;
import java.util.List;
public class PowerPointIntegrationTest {
private PowerPointHelper pph;
private String fileLocation;
private static final String FILE_NAME = "presentation.pptx";
@Before
public void setUp() throws Exception {
File currDir = new File(".");
String path = currDir.getAbsolutePath();
fileLocation = path.substring(0, path.length() - 1) + FILE_NAME;
pph = new PowerPointHelper();
pph.createPresentation(fileLocation);
}
@Test
public void whenReadingAPresentation_thenOK() throws Exception {
XMLSlideShow xmlSlideShow = pph.readingExistingSlideShow(fileLocation);
Assert.assertNotNull(xmlSlideShow);
Assert.assertEquals(4, xmlSlideShow.getSlides().size());
}
@Test
public void whenRetrievingThePlaceholdersForEachSlide_thenOK() throws Exception {
XMLSlideShow xmlSlideShow = pph.readingExistingSlideShow(fileLocation);
List<XSLFShape> onlyTitleSlidePlaceholders = pph.retrieveTemplatePlaceholders(xmlSlideShow.getSlides().get(0));
List<XSLFShape> titleAndBodySlidePlaceholders = pph.retrieveTemplatePlaceholders(xmlSlideShow.getSlides().get(1));
List<XSLFShape> emptySlidePlaceholdes = pph.retrieveTemplatePlaceholders(xmlSlideShow.getSlides().get(3));
Assert.assertEquals(1, onlyTitleSlidePlaceholders.size());
Assert.assertEquals(2, titleAndBodySlidePlaceholders.size());
Assert.assertEquals(0, emptySlidePlaceholdes.size());
}
@Test
public void whenSortingSlides_thenOK() throws Exception {
XMLSlideShow xmlSlideShow = pph.readingExistingSlideShow(fileLocation);
XSLFSlide slide4 = xmlSlideShow.getSlides().get(3);
pph.reorderSlide(xmlSlideShow, 3, 1);
Assert.assertEquals(slide4, xmlSlideShow.getSlides().get(1));
}
@Test
public void givenPresentation_whenDeletingASlide_thenOK() throws Exception {
XMLSlideShow xmlSlideShow = pph.readingExistingSlideShow(fileLocation);
pph.deleteSlide(xmlSlideShow, 3);
Assert.assertEquals(3, xmlSlideShow.getSlides().size());
}
@After
public void tearDown() throws Exception {
File testFile = new File(fileLocation);
if (testFile.exists()) {
testFile.delete();
}
pph = null;
}
}