java实现PPT转PDF出现中文乱码问题的解决方法

ppt转成pdf,原理是ppt转成图片,再用图片生产pdf,过程有个问题,不管是ppt还是pptx,都遇到中文乱码,编程方框的问题,其中ppt后缀网上随便找就有解决方案,就是设置字体为统一字体,pptx如果页面是一种中文字体不会有问题,如果一个页面有微软雅黑和宋体,就会导致部分中文方框,怀疑是poi处理的时候,只读取第一种字体,所以导致多个中文字体乱码。

百度和谷歌都找了很久,有看到说apache官网有人说是bug,但他们回复说是字体问题,这个问题其实我觉得poi可能可以自己做,读取原来字体设置成当前字体,不过性能应该会有很多消耗,反正我估计很多人跟我一样花费大量时间找解决方案,网上几乎没有现成的方案。自己也是一步步尝试,最终找到解决办法,ppt格式的就不说了网上找得到,pptx后缀的网上我是没找到。

问题前的pptx转成图片:

解决后的pptx转成图片:

解决方法:

读取每个shape,将文字转成统一的字体,网上找到的那段代码不可行,我自己改的方案如下:       

for( XSLFShape shape : slide[i].getShapes() ){

if ( shape instanceof XSLFTextShape ){

XSLFTextShape txtshape = (XSLFTextShape)shape ;

System.out.println("txtshape" + (i+1) + ":" + txtshape.getShapeName());

System.out.println("text:" +txtshape.getText());

for ( XSLFTextParagraph textPara : txtshape.getTextParagraphs() ){

List<XSLFTextRun> textRunList = textPara.getTextRuns();

for(XSLFTextRun textRun: textRunList) {

textRun.setFontFamily("宋体");

}

}

}

}

完整代码如下(除了以上自己的解决方案,大部分是stackoverflow上的代码):

public static void convertPPTToPDF(String sourcepath, String destinationPath, String fileType) throws Exception {

FileInputStream inputStream = new FileInputStream(sourcepath);

double zoom = 2;

AffineTransform at = new AffineTransform();

at.setToScale(zoom, zoom);

Document pdfDocument = new Document();

PdfWriter pdfWriter = PdfWriter.getInstance(pdfDocument, new FileOutputStream(destinationPath));

PdfPTable table = new PdfPTable(1);

pdfWriter.open();

pdfDocument.open();

Dimension pgsize = null;

Image slideImage = null;

BufferedImage img = null;

if (fileType.equalsIgnoreCase(".ppt")) {

SlideShow ppt = new SlideShow(inputStream);

inputStream.close();

pgsize = ppt.getPageSize();

Slide slide[] = ppt.getSlides();

pdfDocument.setPageSize(new Rectangle((float) pgsize.getWidth(), (float) pgsize.getHeight()));

pdfWriter.open();

pdfDocument.open();

for (int i = 0; i < slide.length; i++) {

TextRun[] truns = slide[i].getTextRuns();

for ( int k=0;k<truns.length;k++){

RichTextRun[] rtruns = truns[k].getRichTextRuns();

for(int l=0;l<rtruns.length;l++){

// int index = rtruns[l].getFontIndex();

// String name = rtruns[l].getFontName();

rtruns[l].setFontIndex(1);

rtruns[l].setFontName("宋体");

}

}

img = new BufferedImage((int) Math.ceil(pgsize.width * zoom), (int) Math.ceil(pgsize.height * zoom), BufferedImage.TYPE_INT_RGB);

Graphics2D graphics = img.createGraphics();

graphics.setTransform(at);

graphics.setPaint(Color.white);

graphics.fill(new Rectangle2D.Float(0, 0, pgsize.width, pgsize.height));

slide[i].draw(graphics);

graphics.getPaint();

slideImage = Image.getInstance(img, null);

table.addCell(new PdfPCell(slideImage, true));

}

}

if (fileType.equalsIgnoreCase(".pptx")) {

XMLSlideShow ppt = new XMLSlideShow(inputStream);

pgsize = ppt.getPageSize();

XSLFSlide slide[] = ppt.getSlides();

pdfDocument.setPageSize(new Rectangle((float) pgsize.getWidth(), (float) pgsize.getHeight()));

pdfWriter.open();

pdfDocument.open();

for (int i = 0; i < slide.length; i++) {

for( XSLFShape shape : slide[i].getShapes() ){

if ( shape instanceof XSLFTextShape ){

XSLFTextShape txtshape = (XSLFTextShape)shape ;

// System.out.println("txtshape" + (i+1) + ":" + txtshape.getShapeName());

//System.out.println("text:" +txtshape.getText());

for ( XSLFTextParagraph textPara : txtshape.getTextParagraphs() ){

List<XSLFTextRun> textRunList = textPara.getTextRuns();

for(XSLFTextRun textRun: textRunList) {

textRun.setFontFamily("宋体");

}

}

}

}

img = new BufferedImage((int) Math.ceil(pgsize.width * zoom), (int) Math.ceil(pgsize.height * zoom), BufferedImage.TYPE_INT_RGB);

Graphics2D graphics = img.createGraphics();

graphics.setTransform(at);

graphics.setPaint(Color.white);

graphics.fill(new Rectangle2D.Float(0, 0, pgsize.width, pgsize.height));

slide[i].draw(graphics);

// FileOutputStream out = new FileOutputStream("src/main/resources/test"+i+".jpg");

// javax.imageio.ImageIO.write(img, "jpg", out);

graphics.getPaint();

slideImage = Image.getInstance(img, null);

table.addCell(new PdfPCell(slideImage, true));

}

}

pdfDocument.add(table);

pdfDocument.close();

pdfWriter.close();

System.out.println("Powerpoint file converted to PDF successfully");

}

maven配置:

<dependency>

<groupId>org.apache.poi</groupId>

<artifactId>poi</artifactId>

<!-- <version>3.13</version> -->

<version>3.9</version>

</dependency>

<dependency>

<groupId>org.apache.poi</groupId>

<artifactId>poi-ooxml</artifactId>

<!-- <version>3.10-FINAL</version> -->

<version>3.9</version>

</dependency>

<dependency>

<groupId>com.itextpdf</groupId>

<artifactId>itextpdf</artifactId>

<version>5.5.7</version>

</dependency>

<dependency>

<groupId>com.itextpdf.tool</groupId>

<artifactId>xmlworker</artifactId>

<version>5.5.7</version>

</dependency>

<dependency>

<groupId>org.apache.poi</groupId>

<artifactId>poi-scratchpad</artifactId>

<!-- <version>3.12</version> -->

<version>3.9</version>

</dependency>

上面就是为大家分享的java实现PPT转PDF出现中文乱码问题的解决方法,希望对大家的学习有所帮助。

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