Java (481)
Some scanned PDF documents may contain pages displayed in the wrong orientation (e.g., upside-down), which could cause great inconvenience while reading. Rotating pages can help you solve this problem and provide readers with a better reading experience. This article will introduce how to rotate pages in PDF in Java using Spire.PDF for Java.
Install Spire.PDF for Java
First, 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>11.12.16</version>
</dependency>
</dependencies>
Rotate a Specific Page in PDF in Java
Rotation is based on 90-degree increments. You can rotate a PDF page by 0/90/180/270 degrees. The following are the steps to rotate a PDF page:
- Create an instance of PdfDocument class.
- Load a PDF document using PdfDocument.loadFromFile() method.
- Get the desired page by its index (zero-based) using PdfDocument.getPages().get(pageIndex) method.
- Get the original rotation angle of the page using PdfPageBase.getRotation().getValue() method.
- Increase the original rotation angle by desired degrees.
- Apply the new rotation angle to the page using PdfPageBase.setRotation() method.
- Save the result document using PdfDocument.saveToFile() method.
- Java
import com.spire.pdf.PdfDocument;
import com.spire.pdf.PdfPageBase;
import com.spire.pdf.PdfPageRotateAngle;
public class RotatePdfPage {
public static void main(String []args){
//Create a PdfDocument instance
PdfDocument pdf = new PdfDocument();
//Load a PDF document
pdf.loadFromFile("Sample.pdf");
//Get the first page
PdfPageBase page = pdf.getPages().get(0);
//Get the original rotation angle of the page
int rotation = page.getRotation().getValue();
//Rotate the page 180 degrees clockwise based on the original rotation angle
rotation += PdfPageRotateAngle.Rotate_Angle_180.getValue();
page.setRotation(PdfPageRotateAngle.fromValue(rotation));
//Save the result document
pdf.saveToFile("Rotate.pdf");
}
}
Rotate All Pages in PDF in Java
The following are the steps to rotate all pages in a PDF document:
- Create an instance of PdfDocument class.
- Load a PDF document using PdfDocument.loadFromFile() method.
- Loop through the pages in the document.
- Get the original rotation angle of each page using PdfPageBase.getRotation().getValue() method.
- Increase the original rotation angle by desired degrees.
- Apply the new rotation angle to the page using PdfPageBase.setRotation() method.
- Save the result document using PdfDocument.saveToFile() method.
- Java
import com.spire.pdf.PdfDocument;
import com.spire.pdf.PdfPageBase;
import com.spire.pdf.PdfPageRotateAngle;
public class RotateAllPdfPages {
public static void main(String []args){
//Create a PdfDocument instance
PdfDocument pdf = new PdfDocument();
//Load a PDF document
pdf.loadFromFile("Sample.pdf");
//Loop through each page in the document
for(PdfPageBase page :(Iterable) pdf.getPages()) {
//Get the original rotation angle of the page
int rotation = page.getRotation().getValue();
//Rotate the page 180 degrees clockwise based on the original rotation angle
rotation += PdfPageRotateAngle.Rotate_Angle_180.getValue();
page.setRotation(PdfPageRotateAngle.fromValue(rotation));
}
//Save the result document
pdf.saveToFile("RotateAll.pdf");
}
}
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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.
When you are collaborating on a PowerPoint document with your team members, adding comments is the most effective way to give feedbacks or communicate the changes you need to make on a particular slide. Once a comment has been added, you may also need to edit or delete it later. This article will demonstrate how to programmatically add, change or delete comments in a PowerPoint Document using Spire.Presentation for Java.
- Add a Comment to a Presentation Slide in Java
- Change a Comment in a Presentation Slide in Java
- Delete a Comment from a Presentation Slide in 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>11.1.1</version>
</dependency>
</dependencies>
Add a Comment to a Presentation Slide in Java
Spire.Presentation for Java offers the ISlide.addComment() method to add comments to a specified PowerPoint slide. The following are the steps to add a PowerPoint comment.
- Initialize an instance of Presentation class.
- Load a PowerPoint document using Presentation.loadFromFile() method.
- Add the author of the comment using Presentation.getCommentAuthors().addAuthor() method.
- Get a specified slide using Presentation.getSlides().get() method, and then add a comment to the slide using ISlide.addComment(ICommentAuthor author, java.lang.String text, java.awt.geom.Point2D position, java.util.Date dateTime) method.
- Save the result document using Presentation.saveToFile() method.
- Java
import com.spire.presentation.*;
import java.awt.geom.Point2D;
public class AddComment {
public static void main(String[] args) throws Exception{
//Initialize an instance of Presentation class
Presentation ppt = new Presentation();
//Load a sample PowerPoint document
ppt.loadFromFile("C:\\Users\\Administrator\\Desktop\\Sample.pptx");
//Add the author of the comment
ICommentAuthor author = ppt.getCommentAuthors().addAuthor("E-iceblue", "Comment:");
//Add a comment to the specified slide
ppt.getSlides().get(0).addComment(author, "The first comment", new Point2D.Float(350, 170), new java.util.Date());
//Save the result document
ppt.saveToFile("AddComment.pptx", FileFormat.PPTX_2013);
ppt.dispose();
}
}
Change a Comment in a Presentation Slide in Java
To update or modify the content of an existing comment, you can use the ISlide.getComments().setText() method. The following are the steps to change a PowerPoint comment.
- Initialize an instance of Presentation class.
- Load a PowerPoint document using Presentation.loadFromFile() method.
- Get a specified slide using Presentation.getSlides().get() method.
- Replace a specified comment in the slide using ISlide.getComments().setText() method.
- Save the result document using Presentation.saveToFile() method.
- Java
import com.spire.presentation.*;
public class ReplaceComment {
public static void main(String[] args) throws Exception{
//Initialize an instance of Presentation class
Presentation ppt = new Presentation();
//Load a sample PowerPoint document
ppt.loadFromFile("AddComment.pptx");
//Get the first slide
ISlide slide = ppt.getSlides().get(0);
//Replace a specified comment in the slide
slide.getComments()[0].setText("Summary of Spire.Presentation for Java functions");
//Save the result document
ppt.saveToFile("ReplaceComment.pptx", FileFormat.PPTX_2013);
ppt.dispose();
}
}
Delete a Comment from a Presentation Slide in Java
Spire.Presentation for Java also allows you to remove comments from a specified slide using ISlide.deleteComment() method. The detailed steps are as follows.
- Initialize an instance of Presentation class.
- Load a PowerPoint document using Presentation.loadFromFile() method.
- Get a specified slide using Presentation.getSlides().get() method.
- Remove a specified comment from the slide using ISlide.deleteComment(Comment comment) method.
- Save the result document using Presentation.saveToFile() method.
- Java
import com.spire.presentation.*;
public class DeleteComment {
public static void main(String[] args) throws Exception{
//Initialize an instance of Presentation class
Presentation ppt = new Presentation();
//Load a sample PowerPoint document
ppt.loadFromFile("AddComment.pptx");
//Get the first slide
ISlide slide = ppt.getSlides().get(0);
//Remove a specified comment from the slide
slide.deleteComment(slide.getComments()[0]);
//Save the result document
ppt.saveToFile("DeleteComment.pptx", FileFormat.PPTX_2013);
ppt.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.
Java: Add, Modify, or Remove Footers in PowerPoint Documents
2024-04-12 09:13:00 Written by AdministratorAdding, modifying, and removing footers in PowerPoint documents is crucial as footers can provide additional information and organizational structure to the document. By including page numbers, dates, author information, or custom text in the footer, it can help the audience better understand the presentation content and track document versions. Footers also enhance the professionalism and tidiness of the document, making it more visually appealing and readable. Modifying footers allows for updating information or adjusting formats as needed to ensure the document remains current and consistent. Removing footers can customize the document's appearance based on specific requirements or design preferences. This article will introduce how to use Spire.Presentation for Java to add, modify, and remove footers in PowerPoint documents within a Java project.
- Java Add Footers in PowerPoint Documents
- Java Modify Footers in PowerPoint Documents
- Java Remove Footers in PowerPoint Documents
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>11.1.1</version>
</dependency>
</dependencies>
Java Add Footers in PowerPoint Documents
Using Spire.Presentation, you can easily add consistent footer content to the bottom of each page in a PowerPoint document. By adding footer placeholders, page number placeholders, and time placeholders, you can ensure that the footer content on each page remains consistent. Here are the detailed steps:
- Create a lisentation object.
- Load a PowerPoint document using the lisentation.loadFromFile() method.
- Set the footer visible using lisentation.setFooterVisible(true) and set the footer text.
- Set the slide number visible using lisentation.setSlideNumberVisible(true), iterate through each slide, check for the lisence of a page number placeholder, and modify the text to the "Page X" format if found.
- Set the date and time visible using lisentation.setDateTimeVisible(true).
- Set the format of the date using the lisentation.setDateTime() method.
- Save the document to a specified path using the lisentation.saveToFile() method.
- Java
import com.spire.presentation.*;
import java.util.Date;
public class AddFooter {
public static void main(String[] args) throws Exception {
// Create a Presentation object
Presentation presentation = new Presentation();
// Load the presentation from a file
presentation.loadFromFile("Sample1.pptx");
// Set the footer visible
presentation.setFooterVisible(true);
// Set the footer text to "Spire.Presentation"
presentation.setFooterText("Spire.Presentation");
// Set the slide number visible
presentation.setSlideNumberVisible(true);
// Iterate through each slide in the presentation
for (int i = 0; i < presentation.getSlides().getCount(); i++) {
ISlide slide = presentation.getSlides().get(i);
for (int j = 0; j < slide.getShapes().getCount(); j++) {
IShape shape = slide.getShapes().get(j);
if (shape.getPlaceholder() != null) {
// If it is a slide number placeholder
if (shape.getPlaceholder().getType().equals(PlaceholderType.SLIDE_NUMBER)) {
IAutoShape shape1 = (IAutoShape) shape;
ParagraphEx paragraph = shape1.getTextFrame().getTextRange().getParagraph();
String text = paragraph.getText();
// Modify the slide number text to "Page X"
paragraph.setText("Page " + text);
}
}
}
}
// Set the date time visible
presentation.setDateTimeVisible(true);
// Create a Date object to represent the current time
Date currentDate = new Date();
// Set the date time format
presentation.setDateTime(currentDate, "MM/dd/yyyy");
// Save the modified presentation to a file
presentation.saveToFile("AddedFooter.pptx", FileFormat.PPTX_2016);
// Release the resources of the Presentation object
presentation.dispose();
}
}
Java Modify Footers in PowerPoint Documents
To modify the footer in a PowerPoint document, you need to inspect each shape on every slide to identify footer placeholders, page number placeholders, and so on. By recognizing these placeholders, you can set specific content and formats for each type. Here are the detailed steps:
- Create a Presentation object.
- Load a PowerPoint document using the Presentation.loadFromFile() method.
- Retrieve a slide using the Presentation.getSlides().get(index) method.
- Iterate through the shapes on the slide using a for loop, inspect each shape to determine if it is a placeholder for the footer, page number, etc., and then modify its content or format accordingly.
- Save the document to a specified path using the Presentation.saveToFile() method.
- Java
import com.spire.presentation.*;
import com.spire.presentation.drawing.FillFormatType;
import java.awt.*;
public class ModifyFooter {
public static void main(String[] args) throws Exception {
// Create a Presentation object
Presentation presentation = new Presentation();
// Load a presentation from a file
presentation.loadFromFile("Sample2.pptx");
// Get the first slide
ISlide slide = presentation.getSlides().get(0);
// Iterate through shapes on the slide
for (int i = 0; i < slide.getShapes().getCount(); i++) {
// Check if the shape is a placeholder
if (slide.getShapes().get(i).getPlaceholder() != null) {
// Get the placeholder type
PlaceholderType type = slide.getShapes().get(i).getPlaceholder().getType();
// If it's a footer placeholder
if (type == PlaceholderType.FOOTER) {
// Convert the shape to IAutoShape type
IAutoShape autoShape = (IAutoShape) slide.getShapes().get(i);
// Set the text content to "E-ICEBLUE"
autoShape.getTextFrame().setText("E-ICEBLUE");
// Modify the font of the text
ChangeFont(autoShape.getTextFrame().getParagraphs().get(0));
}
// If it's a slide number placeholder
if (type == PlaceholderType.SLIDE_NUMBER) {
// Convert the shape to IAutoShape type
IAutoShape autoShape = (IAutoShape) slide.getShapes().get(i);
// Modify the font of the text
ChangeFont(autoShape.getTextFrame().getParagraphs().get(0));
}
}
}
// Save the modified presentation to a file
presentation.saveToFile("ModifiedFooter.pptx", FileFormat.PPTX_2016);
// Dispose of the Presentation object resources
presentation.dispose();
}
static void ChangeFont(ParagraphEx paragraph)
{
// Iterate through each text range in the paragraph
for (int i = 0; i < paragraph.getTextRanges().getCount(); i++) {
// Set the text style to italic
paragraph.getTextRanges().get(i).isItalic(TriState.TRUE);
// Set the text font
paragraph.getTextRanges().get(i).setEastAsianFont (new TextFont("Times New Roman"));
// Set the text font size to 34
paragraph.getTextRanges().get(i).setFontHeight(34);
// Set the text color
paragraph.getTextRanges().get(i).getFill().setFillType(FillFormatType.SOLID);
paragraph.getTextRanges().get(i).getFill().getSolidColor().setColor(Color.BLUE);
}
}
}
Java Remove Footers in PowerPoint Documents
To delete the footer in a PowerPoint document, you first need to retrieve content such as footer placeholders, page number placeholders, time placeholders, etc., within the slides. Once these placeholders are identified, you can locate and remove them from the collection of shapes on the slide. Here are the detailed steps:
- Create a Presentation object.
- Load a PowerPoint document using the Presentation.loadFromFile() method.
- Retrieve a slide using the Presentation.getSlides().get(index) method.
- Iterate through the shapes on the slide using a for loop, check if they are placeholders, and if they are footer placeholders, page number placeholders, time placeholders, remove them from the slide.
- Save the document to a specified path using the Presentation.saveToFile() method.
- Java
import com.spire.presentation.*;
public class RemoveFooter {
public static void main(String[] args) throws Exception {
// Create a Presentation object
Presentation presentation = new Presentation();
// Load the presentation from a file
presentation.loadFromFile("Sample2.pptx");
// Get the first slide
ISlide slide = presentation.getSlides().get(0);
// Iterate through the shapes on the slide
for (int i = slide.getShapes().getCount() - 1; i >= 0; i--) {
// Check if the shape is a placeholder
if (slide.getShapes().get(i).getPlaceholder() != null) {
// Get the placeholder type
PlaceholderType type = slide.getShapes().get(i).getPlaceholder().getType();
// If it's a footer placeholder
if (type == PlaceholderType.FOOTER) {
// Remove it from the slide
slide.getShapes().removeAt(i);
}
// If it's a slide number placeholder
if (type == PlaceholderType.SLIDE_NUMBER) {
// Remove it from the slide
slide.getShapes().removeAt(i);
}
// If it's a date and time placeholder
if (type == PlaceholderType.DATE_AND_TIME) {
// Remove it from the slide
slide.getShapes().removeAt(i);
}
}
}
// Save the modified presentation to a file
presentation.saveToFile("RemovedFooter.pptx", FileFormat.PPTX_2016);
// Dispose of the Presentation object resources
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.
