我想知道,有没有办法通过Apache POI替换ppt演示中的图片?
我有一个模板,我放置了元素(文本字段和图像),我发现了如何替换文本,但没有找到任何图像。
答案 0 :(得分:2)
可以通过两种方式替换图像:
只需在路径(/ ppt / media)下替换pptx文件(zip文件)中的图像即可。查看此post如何操作..
或POI方法是删除文件并添加一个新文件...并且可能更改其他几个图像属性(宽度,高度......) - 请参阅下面的示例
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.OutputStream;
import javax.xml.namespace.QName;
import org.apache.poi.openxml4j.opc.PackagePart;
import org.apache.poi.openxml4j.opc.PackagePartName;
import org.apache.poi.openxml4j.opc.PackageRelationship;
import org.apache.poi.openxml4j.opc.PackagingURIHelper;
import org.apache.poi.openxml4j.opc.TargetMode;
import org.apache.poi.xslf.usermodel.XMLSlideShow;
import org.apache.poi.xslf.usermodel.XSLFSheet;
import org.apache.xmlbeans.XmlCursor;
public class ReplaceImageInPptx {
public static void main(String[] args) throws Exception {
FileInputStream fis = new FileInputStream("test2.pptx");
XMLSlideShow pptx = new XMLSlideShow(fis);
fis.close();
String blipNS[] = {
"http://schemas.openxmlformats.org/drawingml/2006/main",
"http://schemas.openxmlformats.org/presentationml/2006/main"
};
for (XSLFSheet slide : pptx.getSlides()) {
PackagePart packPart = slide.getPackagePart();
for (String ns : blipNS) {
XmlCursor picCur = slide.getXmlObject().newCursor();
picCur.selectPath("declare namespace p='"+ns+"' .//p:blip"); // or blipFill
while (picCur.toNextSelection()) {
// ... doesn't work for all namespaces ...
// CTBlipFillProperties blipFill = (CTBlipFillProperties)picCur.getObject();
// CTBlip blip = blipFill.getBlip();
// String relId = blip.getEmbed();
QName relName = new QName("http://schemas.openxmlformats.org/officeDocument/2006/relationships", "embed");
String relId = picCur.getAttributeText(relName);
// remove old media file and reference
PackageRelationship packRel = packPart.getRelationship(relId);
PackagePartName oldPartName = PackagingURIHelper.createPartName(packRel.getTargetURI());
packPart.getPackage().removePart(oldPartName);
// add something new
PackagePartName partName = PackagingURIHelper.createPartName("/ppt/media/smiley.jpg");
PackagePart part = pptx.getPackage().createPart(partName, "image/jpeg");
OutputStream partOs = part.getOutputStream();
FileInputStream fis2 = new FileInputStream("src/test/resources/smiley.jpg");
byte buf[] = new byte[1024];
for (int readBytes; (readBytes = fis2.read(buf)) != -1; partOs.write(buf, 0, readBytes));
fis2.close();
partOs.close();
PackageRelationship prs = slide.getPackagePart().addRelationship(partName, TargetMode.INTERNAL, "http://schemas.openxmlformats.org/officeDocument/2006/relationships/image");
// blip.setEmbed(prs.getId());
picCur.setAttributeText(relName, prs.getId());
// maybe change the size a bit
// blipFill.getStretch().getFillRect().setL(<left padding in % (+/-)>)
}
picCur.dispose();
}
}
FileOutputStream fos = new FileOutputStream("test3.pptx");
pptx.write(fos);
fos.close();
}
}