Aspose.Slides FOSS
Java
Kako formatirati tekst u Java

Kako formatirati tekst u Java

Aspose.Slides FOSS for Java provides fine-grained text formatting through the PortionFormat klasa. A Portion je najmanja nezavisna jedinica teksta; ona se mapira na jedan formatirajući segment unutar pasusa. Ovaj vodič pokazuje kako primeniti podebljano, kurziv, veličinu fonta i boju formatiranja na tekst u prezentaciji.

Vodič korak po korak

Korak 1: Dodajte Maven zavisnost 

<dependency>
  <groupId>org.aspose.slides.foss</groupId>
  <artifactId>aspose-slides-foss</artifactId>
  <version>1.0.0</version>
</dependency>

Korak 2: Dodajte oblik sa tekstualnim okvirom

Pre formatiranja teksta, oblik mora da sadrži a TextFrame. Koristite shape.addTextFrame() da biste ga napravili.

import org.aspose.slides.foss.Presentation;
import org.aspose.slides.foss.ISlide;
import org.aspose.slides.foss.IAutoShape;
import org.aspose.slides.foss.ITextFrame;
import org.aspose.slides.foss.IParagraph;
import org.aspose.slides.foss.IPortion;
import org.aspose.slides.foss.Portion;
import org.aspose.slides.foss.IPortionFormat;
import org.aspose.slides.foss.ShapeType;
import org.aspose.slides.foss.FillType;
import org.aspose.slides.foss.NullableBool;
import org.aspose.slides.foss.export.SaveFormat;
import org.aspose.slides.foss.drawing.Color;

try (Presentation prs = new Presentation()) {
    ISlide slide = prs.getSlides().get(0);
    IAutoShape shape = slide.getShapes().addAutoShape(
        ShapeType.RECTANGLE, 50, 50, 500, 150
    );
    ITextFrame tf = shape.addTextFrame("Default text: will be formatted");
    prs.save("output.pptx", SaveFormat.PPTX);
}

Korak 3: Pristupite TextFrame-u

shape.addTextFrame() vraća TextFrame objekat. Takođe ga možete preuzeti kasnije putem shape.getTextFrame().

ITextFrame tf = shape.getTextFrame();          // if the frame already exists
ITextFrame tf = shape.addTextFrame("");        // creates a new frame

A TextFrame sadrži listu Paragraph objekata (tf.getParagraphs()) Paragraph sadrži Portion objekata (paragraph.getPortions()).

Korak 4: Primena podebljanog i kurziva

Koristite portionFormat.setFontBold() i portionFormat.setFontItalic(). Ove metode prihvataju NullableBool.TRUE, NullableBool.FALSE, ili NullableBool.NOT_DEFINED (nasledi od mastera).

import org.aspose.slides.foss.Presentation;
import org.aspose.slides.foss.ISlide;
import org.aspose.slides.foss.IAutoShape;
import org.aspose.slides.foss.ITextFrame;
import org.aspose.slides.foss.IParagraph;
import org.aspose.slides.foss.IPortion;
import org.aspose.slides.foss.Portion;
import org.aspose.slides.foss.IPortionFormat;
import org.aspose.slides.foss.ShapeType;
import org.aspose.slides.foss.FillType;
import org.aspose.slides.foss.NullableBool;
import org.aspose.slides.foss.export.SaveFormat;
import org.aspose.slides.foss.drawing.Color;

try (Presentation prs = new Presentation()) {
    ISlide slide = prs.getSlides().get(0);
    IAutoShape shape = slide.getShapes().addAutoShape(
        ShapeType.RECTANGLE, 50, 50, 500, 150
    );
    ITextFrame tf = shape.addTextFrame("Bold and italic text");

    IPortionFormat fmt = tf.getParagraphs().get(0)
        .getPortions().get(0).getPortionFormat();
    fmt.setFontBold(NullableBool.TRUE);
    fmt.setFontItalic(NullableBool.TRUE);

    prs.save("bold-italic.pptx", SaveFormat.PPTX);
}

Korak 5: Postavljanje veličine fonta i boje

Postavi portionFormat.setFontHeight() za veličinu (u tačkama) i koristi getFillFormat() za boju.

import org.aspose.slides.foss.Presentation;
import org.aspose.slides.foss.ISlide;
import org.aspose.slides.foss.IAutoShape;
import org.aspose.slides.foss.ITextFrame;
import org.aspose.slides.foss.IParagraph;
import org.aspose.slides.foss.IPortion;
import org.aspose.slides.foss.Portion;
import org.aspose.slides.foss.IPortionFormat;
import org.aspose.slides.foss.ShapeType;
import org.aspose.slides.foss.FillType;
import org.aspose.slides.foss.NullableBool;
import org.aspose.slides.foss.export.SaveFormat;
import org.aspose.slides.foss.drawing.Color;

try (Presentation prs = new Presentation()) {
    ISlide slide = prs.getSlides().get(0);
    IAutoShape shape = slide.getShapes().addAutoShape(
        ShapeType.RECTANGLE, 50, 50, 500, 150
    );
    ITextFrame tf = shape.addTextFrame("Large corporate-blue heading");

    IPortionFormat fmt = tf.getParagraphs().get(0)
        .getPortions().get(0).getPortionFormat();
    fmt.setFontHeight(32);                          // 32pt font
    fmt.setFontBold(NullableBool.TRUE);
    fmt.getFillFormat().setFillType(FillType.SOLID);
    fmt.getFillFormat().getSolidFillColor().setColor(
        Color.fromArgb(255, 0, 70, 127)
    );

    prs.save("colored-text.pptx", SaveFormat.PPTX);
}

Color.fromArgb(alpha, red, green, blue) prihvata vrednosti 0-255 za svaki kanal.

Korak 6: Više delova u jednom paragrafu

Jedan odlomak može da sadrži više delova sa različitim formatiranjem. Dodajte novi Portion u odlomak’s getPortions() kolekcija:

import org.aspose.slides.foss.Presentation;
import org.aspose.slides.foss.ISlide;
import org.aspose.slides.foss.IAutoShape;
import org.aspose.slides.foss.ITextFrame;
import org.aspose.slides.foss.IParagraph;
import org.aspose.slides.foss.IPortion;
import org.aspose.slides.foss.Portion;
import org.aspose.slides.foss.IPortionFormat;
import org.aspose.slides.foss.ShapeType;
import org.aspose.slides.foss.FillType;
import org.aspose.slides.foss.NullableBool;
import org.aspose.slides.foss.export.SaveFormat;
import org.aspose.slides.foss.drawing.Color;

try (Presentation prs = new Presentation()) {
    ISlide slide = prs.getSlides().get(0);
    IAutoShape shape = slide.getShapes().addAutoShape(
        ShapeType.RECTANGLE, 50, 50, 600, 100
    );
    ITextFrame tf = shape.addTextFrame("");  // start with empty frame

    IParagraph paragraph = tf.getParagraphs().get(0);

    // First portion: normal text
    IPortion portion1 = paragraph.getPortions().get(0);
    portion1.setText("Normal text followed by ");
    portion1.getPortionFormat().setFontHeight(20);

    // Second portion: bold red text
    Portion portion2 = new Portion("bold red text");
    portion2.getPortionFormat().setFontHeight(20);
    portion2.getPortionFormat().setFontBold(NullableBool.TRUE);
    portion2.getPortionFormat().getFillFormat().setFillType(FillType.SOLID);
    portion2.getPortionFormat().getFillFormat().getSolidFillColor().setColor(
        Color.fromArgb(255, 200, 0, 0)
    );
    paragraph.getPortions().add(portion2);

    prs.save("mixed-format.pptx", SaveFormat.PPTX);
}

Uobičajeni problemi i rešenja

Tekst se prikazuje crno iako je boja postavljena

Osigurajte getFillFormat().setFillType(FillType.SOLID) se poziva pre dodele boje. Bez postavljanja tipa popunjavanja, promena boje možda neće imati efekta.

NullableBool.TRUE vs true

portionFormat.setFontBold() očekuje NullableBool.TRUE, a ne Java’s true. Prosleđivanje boolean vrednosti će izazvati grešku pri kompajliranju pošto metoda očekuje NullableBool enum.

Font se ne pojavljuje u sačuvanoj datoteci

The setLatinFont() metod postavlja latinski font porodicu. Ako nije postavljeno, koristi se font teme prezentacije. Prilagođeni fontovi moraju biti ugrađeni ili dostupni na računaru za pregled.

Često postavljana pitanja

Kako da promenim porodicu fonta?

Postavi portionFormat.setLatinFont():

fmt.setLatinFont(new FontData("Arial"));

FontData prihvata ime porodice fonta kao string.

Kako da postavim poravnanje pasusa?

Koristi paragraphFormat.setAlignment():

import org.aspose.slides.foss.TextAlignment;

tf.getParagraphs().get(0).getParagraphFormat()
    .setAlignment(TextAlignment.CENTER);

Podržane vrednosti: LEFT, CENTER, RIGHT, JUSTIFY.

Kako da postavim razmak između redova?

Koristi paragraphFormat.setSpaceBefore() (tačke pre pasusa) ili paragraphFormat.setSpaceAfter() (tačke posle pasusa):

tf.getParagraphs().get(0).getParagraphFormat().setSpaceBefore(12);  // 12pt before
tf.getParagraphs().get(0).getParagraphFormat().setSpaceAfter(6);    // 6pt after

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