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：
我要评论
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。
如对本文有疑问， 点击进行留言回复！！
Mybatis PersistenceException异常：Error building SqlSession The error may exist in SQL Mapper Configur
MyBatis——动态SQL语句——if标签和where标签复合使用
网友评论