发布于 2016-08-06 23:15:00 | 338 次阅读 | 评论: 1 | 来源: 网友投递
Java程序设计语言
java 是一种可以撰写跨平台应用软件的面向对象的程序设计语言,是由Sun Microsystems公司于1995年5月推出的Java程序设计语言和Java平台(即JavaEE(j2ee), JavaME(j2me), JavaSE(j2se))的总称。
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。