Java (480)
Text watermark refers to a transparent or translucent logo or information added in the form of text on documents, images or other media. This feature is also applicable to PowerPoint presentations. Overlaying text watermarks on slides helps users identify copyright ownership, protect document security, or convey other information. In this article, we will show you how to add text watermark to PowerPoint slide using Spire.Presentation for Java.
Install Spire.Presentation for Java
First of all, you're required to add the Spire.Presentation.jar file as a dependency in your Java program. The JAR file can be downloaded from this link. If you use Maven, you can easily import the JAR file in your application by adding the following code to your project's pom.xml file.
<repositories>
<repository>
<id>com.e-iceblue</id>
<name>e-iceblue</name>
<url>https://repo.e-iceblue.com/nexus/content/groups/public/</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>e-iceblue</groupId>
<artifactId>spire.presentation</artifactId>
<version>10.11.4</version>
</dependency>
</dependencies>
Add a Single Text Watermark to Slide
Spire.Presentation for Java supports adding a single text watermark by inserting a shape to slide using Presentation.getSlides().get().getShapes().appendShape() method. And Then set text of it by calling IAutoShape.getTextFrame().setText() method. The following are detailed steps.
- Create a Presentation object and load a sample file using Presentation.loadFromFile() method.
- Set the width and height of watermark string.
- Create a Rectangle2D.Double object and specify the position and size of the rectangle shape by calling Presentation.getSlideSize().getSize().getWidth() and Presentation.getSlideSize().getSize().getHeight() methods.
- Add the rectangle shape to the first slide using Presentation.getSlides().get().getShapes().appendShape() method.
- Set the style of the shape.
- Set text of the shape by using IAutoShape.getTextFrame().setText() and get the specific range using IAutoShape.getTextFrame().getTextRange() method.
- Set the style of the text range.
- Save the result file using Presentation.saveToFile() method.
- Java
import com.spire.presentation.*;
import com.spire.presentation.drawing.FillFormatType;
import java.awt.*;
import java.awt.geom.Rectangle2D;
public class InsertSingleWatermark {
public static void main(String[] args) throws Exception {
//Create a Presentation object and load a sample file
Presentation presentation = new Presentation();
presentation.loadFromFile("sample.pptx");
//Set the width and height of watermark string
int width= 400;
int height= 300;
//Define the position and size of shape
Rectangle2D.Double rect = new Rectangle2D.Double((presentation.getSlideSize().getSize().getWidth() - width) / 2,
(presentation.getSlideSize().getSize().getHeight() - height) / 2, width, height);
//Add the shape to the first slide
IAutoShape shape = presentation.getSlides().get(0).getShapes().appendShape(ShapeType.RECTANGLE, rect);
//Set the style of shape
shape.getFill().setFillType(FillFormatType.NONE);
shape.getShapeStyle().getLineColor().setColor(Color.white);
shape.setRotation(-45);
shape.getLocking().setSelectionProtection(true);
shape.getLine().setFillType(FillFormatType.NONE);
//Add text to shape
shape.getTextFrame().setText("Confidential");
PortionEx textRange = shape.getTextFrame().getTextRange();
//Set the style of the text range
textRange.getFill().setFillType(FillFormatType.SOLID);
textRange.setFontHeight(50);
Color color = new Color(237,129,150,200);
textRange.getFill().getSolidColor().setColor(color);
//Save the result document
presentation.saveToFile("output/SingleWatermark.pptx", FileFormat.PPTX_2010);
presentation.dispose();
}
}
Add a Tiled Text Watermark to Slide
By calling Presentation.getSlides().get().getShapes().appendShape() method multiple times in a loop, multiple rectangle shapes can be added at different positions to achieve the effect of tiled watermarks. The following are detailed steps.
- Create a Presentation object and load a sample file using Presentation.loadFromFile() method.
- Set the text of watermarks and measure the size of the watermark text.
- Initialize x and y coordinate of the watermark. And then add multiple rectangle shapes to slides by calling Presentation.getSlides().get().getShapes().appendShape() method for multiple times in a loop.
- Set the style of the shapes.
- Add text to the shapes by using IAutoShape.getTextFrame().setText() method and get the specific ranges using IAutoShape.getTextFrame().getTextRange() method.
- Set the style of the text ranges.
- Save the result file using Presentation.saveToFile() method.
- Java
import com.spire.pdf.graphics.PdfTrueTypeFont;
import com.spire.presentation.*;
import com.spire.presentation.drawing.FillFormatType;
import java.awt.*;
import java.awt.geom.Dimension2D;
import java.awt.geom.Rectangle2D;
public class InsertTiledWatermark {
public static void main(String[] args) throws Exception {
//Create a Presentation object and load a sample file
Presentation presentation = new Presentation();
presentation.loadFromFile("sample.pptx");
//Set the text of watermarks
String watermarkText = "Confidential";
//Measure the size of the watermark text
Font font = new java.awt.Font("Arial", java.awt.Font.BOLD, 20);
PdfTrueTypeFont trueTypeFont = new PdfTrueTypeFont(font);
Dimension2D strSize = trueTypeFont.measureString(watermarkText);
//Initialize x and y coordinate
float x = 30;
float y = 80;
for (int rowNum = 0; rowNum < 4; rowNum++) {
for (int colNum = 0; colNum < 4; colNum++) {
//Add rectangle shapes to the first slide
Rectangle2D rect = new Rectangle2D.Float(x, y, (float) strSize.getWidth() + 10, (float) strSize.getHeight());
IAutoShape shape = presentation.getSlides().get(0).getShapes().appendShape(ShapeType.RECTANGLE, rect);
//Set the style of the shapes
shape.getFill().setFillType(FillFormatType.NONE);
shape.getShapeStyle().getLineColor().setColor(new Color(1, 1, 1, 0));
shape.setRotation(-45);
shape.getLocking().setSelectionProtection(true);
shape.getLine().setFillType(FillFormatType.NONE);
//Add watermark text to the shapes
shape.getTextFrame().setText(watermarkText);
PortionEx textRange = shape.getTextFrame().getTextRange();
//Set the style of the text ranges
textRange.getFill().setFillType(FillFormatType.SOLID);
textRange.setLatinFont(new TextFont(trueTypeFont.getName()));
textRange.setFontMinSize(trueTypeFont.getSize());
Color color = new Color(237,129,150,200);
textRange.getFill().getSolidColor().setColor(color);
x += (100 + strSize.getWidth());
}
x = 30;
y += (100 + strSize.getHeight());
}
//Save the result document
presentation.saveToFile("output/TiledWatermark.pptx", FileFormat.PPTX_2013);
presentation.dispose();
}
}
Apply for a Temporary License
If you'd like to remove the evaluation message from the generated documents, or to get rid of the function limitations, please request a 30-day trial license for yourself.
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Watermark
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In this article, you'll learn how to add a grid to PDF and how to format the grid as well, by using Spire.PDF with Java.
import com.spire.pdf.graphics.*;
import com.spire.pdf.grid.PdfGrid;
import java.awt.*;
public class CreateGrid {
public static void main(String[] args) {
//create a pdf document
PdfDocument doc = new PdfDocument();
PdfPageBase page = doc.getPages().add();
//create a PdfGrid object
PdfGrid grid = new PdfGrid();
//set the cell padding, font, text brush, background brush of the grid
grid.getStyle().setCellPadding(new PdfPaddings(3,3,3,3));
grid.getStyle().setFont(new PdfTrueTypeFont(new Font("Arial Unicode MS", Font.PLAIN,10), true));
grid.getStyle().setTextBrush(PdfBrushes.getBlack());
grid.getStyle().setBackgroundBrush(PdfBrushes.getLightGray());
//create a PdfBorders object
PdfBorders borders= new PdfBorders();
borders.setAll(new PdfPen(PdfBrushes.getWhite(),1f));
//define sample data
String[] data = {"Continent;Country;Population;Ratio to World Pop;Flag",
"Asia;China;1,391,190,000;18.2%; ",
"Asia;Japan;126,490,000;1.66%; ",
"Europe;United Kingdom;65,648,054;0.86%; ",
"Europe;Germany;82,665,600;1.08%; ",
"North America; Canada; 37,119,000; 0.49%; ",
"North America; United States; 327,216,000; 4.29%; "
};
String[][] dataSource = new String[data.length][];
for (int i = 0; i < data.length; i++) {
dataSource[i] = data[i].split("[;]", -1);
}
//fill the grid with data
grid.setDataSource(dataSource);
//fill the cells with background images
grid.getRows().get(1).getCells().get(4).getStyle().setBackgroundImage(PdfImage.fromFile("F:\\Documents\\flags\\flag-of-China.png"));
grid.getRows().get(2).getCells().get(4).getStyle().setBackgroundImage(PdfImage.fromFile("F:\\Documents\\flags\\flag-of-Japan.png"));
grid.getRows().get(3).getCells().get(4).getStyle().setBackgroundImage(PdfImage.fromFile("F:\\Documents\\flags\\flag-of-United-Kingdom.png"));
grid.getRows().get(4).getCells().get(4).getStyle().setBackgroundImage(PdfImage.fromFile("F:\\Documents\\flags\\flag-of-Germany.png"));
grid.getRows().get(5).getCells().get(4).getStyle().setBackgroundImage(PdfImage.fromFile("F:\\Documents\\flags\\flag-of-Canada.png"));
grid.getRows().get(6).getCells().get(4).getStyle().setBackgroundImage(PdfImage.fromFile("F:\\Documents\\flags\\flag-of-United-States-of-America.png"));
//set the width of the last column
grid.getColumns().get(grid.getColumns().getCount()-1).setWidth(60f);
//vertically span cells
grid.getRows().get(1).getCells().get(0).setRowSpan(2);
grid.getRows().get(3).getCells().get(0).setRowSpan(2);
grid.getRows().get(5).getCells().get(0).setRowSpan(2);
for (int i = 0; i < data.length ; i++) {
//set the height of each row
grid.getRows().get(i).setHeight(30f);
//set the background color of the first column
grid.getRows().get(i).getCells().get(0).getStyle().setBackgroundBrush(PdfBrushes.getDarkGray());
//set the font of the first column
grid.getRows().get(i).getCells().get(0).getStyle().setFont(new PdfTrueTypeFont(new Font("Arial",Font.PLAIN,12),true));
for (int j = 0; j < grid.getColumns().getCount(); j++) {
//apply border style to all cells
grid.getRows().get(i).getCells().get(j).getStyle().setBorders(borders);
//apply text alignment to all cells
grid.getRows().get(i).getCells().get(j).setStringFormat(new PdfStringFormat(PdfTextAlignment.Center,PdfVerticalAlignment.Middle));
//set the font of the first row
grid.getRows().get(0).getCells().get(j).getStyle().setFont(new PdfTrueTypeFont(new Font("Arial",Font.PLAIN,12),true));
//set the background color of the first row
grid.getRows().get(0).getCells().get(j).getStyle().setBackgroundBrush(PdfBrushes.getDarkGray());
}
}
//draw grid on the pdf page
grid.draw(page,0,30);
//save to file
doc.saveToFile("Grid.pdf");
doc.close();
}
}
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Table
PDF properties, as a part of a PDF document, are not shown on a page. Those properties contain information on documents, including title, author, subject, keywords, creation date, and creator. Some of the property values will not be produced automatically, and we have to set them by ourselves. This article will show you how to set or retrieve PDF properties programmatically using Spire.PDF for Java.
Install Spire.PDF for Java
First of all, you're required to add the Spire.Pdf.jar file as a dependency in your Java program. The JAR file can be downloaded from this link. If you use Maven, you can easily import the JAR file in your application by adding the following code to your project's pom.xml file.
<repositories>
<repository>
<id>com.e-iceblue</id>
<name>e-iceblue</name>
<url>https://repo.e-iceblue.com/nexus/content/groups/public/</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>e-iceblue</groupId>
<artifactId>spire.pdf</artifactId>
<version>11.10.3</version>
</dependency>
</dependencies>
Set Properties of a PDF Document in Java
The detailed steps of setting PDF properties are as follows.
- Create an object of PdfDocument class.
- Load a PDF document from disk using PdfDocument.loadFromFile() method.
- Set document properties including title, author, subject, keywords, creation date, modification date, creator, and producer using the methods under DocumentInformation object returned by PdfDocument.getDocumentInformation() method.
- Save the document using PdfDocument.saveToFile() method.
- Java
import com.spire.pdf.*;
import java.util.Date;
public class setPDFProperties {
public static void main(String[] args) {
//Create an object of PdfDocument
PdfDocument pdfDocument = new PdfDocument();
//Load a PDF document from disk
pdfDocument.loadFromFile("D:/Samples/Sample.pdf");
//Set the title
pdfDocument.getDocumentInformation().setTitle("PDF(Portable Document Format)");
//Set the author
pdfDocument.getDocumentInformation().setAuthor("John");
//Set the subject
pdfDocument.getDocumentInformation().setSubject("Introduction of PDF");
//Set the keywords
pdfDocument.getDocumentInformation().setKeywords("PDF, document format");
//Set the creation time
pdfDocument.getDocumentInformation().setCreationDate(new Date());
//Set the creator name
pdfDocument.getDocumentInformation().setCreator("John");
//Set the modification time
pdfDocument.getDocumentInformation().setModificationDate(new Date());
//Set the producer name
pdfDocument.getDocumentInformation().setProducer("Spire.PDF for Java");
//Save the document
pdfDocument.saveToFile("output/setPDFProperties.pdf");
}
}
Get Properties of a PDF Document in Java
The detailed steps of retrieving PDF properties are as follows.
- Create an object of PdfDocument class.
- Load a PDF document from disk using PdfDocument.loadFromFile() method.
- Create a StringBuilder instance to store the values of document properties.
- Get properties using the methods under DocumentInformation object returned by PdfDocument.getDocumentInformation() method and put them in the StringBuilder.
- Create a new TXT file using File.createNewFile() method.
- Write the StringBuilder to the TXT file using BufferedWriter.write() method.
- Java
import com.spire.pdf.*;
import java.io.*;
public class getPDFProperties {
public static void main(String[] args) throws IOException {
//Create an object of PdfDocument class
PdfDocument pdf = new PdfDocument();
//Load a PDF document from disk
pdf.loadFromFile("D:/Samples/Sample.pdf");
//Create a StringBuilder instance to store the values of document properties
StringBuilder stringBuilder = new StringBuilder();
//Retrieve property values and put them in the StringBuilder
stringBuilder.append("Title: " + pdf.getDocumentInformation().getTitle() + "\r\n");
stringBuilder.append("Author: " + pdf.getDocumentInformation().getAuthor() + "\r\n");
stringBuilder.append("Subject: " + pdf.getDocumentInformation().getSubject() + "\r\n");
stringBuilder.append("Keywords: " + pdf.getDocumentInformation().getKeywords() + "\r\n");
stringBuilder.append("Creator: " + pdf.getDocumentInformation().getCreator() + "\r\n");
stringBuilder.append("Creation Date: " + pdf.getDocumentInformation().getCreationDate() + "\r\n");
stringBuilder.append("Producer: " + pdf.getDocumentInformation().getProducer() + "\r\n");
//Create a new TXT file
File file = new File("D:/output/getPDFProperties.txt");
file.createNewFile();
//Write the StringBuilder to the TXT file
FileWriter fileWriter = new FileWriter(file, true);
BufferedWriter bufferedWriter = new BufferedWriter(fileWriter);
bufferedWriter.write(stringBuilder.toString());
bufferedWriter.flush();
}
}
Apply for a Temporary License
If you'd like to remove the evaluation message from the generated documents, or to get rid of the function limitations, please request a 30-day trial license for yourself.
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Document Operation
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