如何在DOCX4J中保存word文档中的图像

Question

/word/media/image1.png  rId5    image/png
/word/media/image2.png  rId5    image/png
/word/media/image3.jpg  rId5    image/jpeg

目前，我从文档中获得的所有文本如下所示：

   WordprocessingMLPackage wordMLPackage = WordprocessingMLPackage.load(new java.io.File(filePath))
   MainDocumentPart documentPart = wordMLPackage.getMainDocumentPart()
   Document wmlDocumentEl = (org.docx4j.wml.Document)documentPart.getJaxbElement()
   Body body =  wmlDocumentEl.getBody();
   DocumentTraverser traverser = new DocumentTraverser();

   class DocumentTraverser  extends TraversalUtil.CallbackImpl {
      @Override
      public List<Object> apply(Object o) {
         if (o instanceof org.docx4j.wml.Text) {
         ....
         }
         return null;
      }
   }

Answer 1

对于嵌入式（相对于外部）图像，最简单的方法是：

import java.io.FileOutputStream;
import java.util.Map.Entry;

import org.docx4j.openpackaging.packages.WordprocessingMLPackage;
import org.docx4j.openpackaging.parts.Part;
import org.docx4j.openpackaging.parts.PartName;
import org.docx4j.openpackaging.parts.WordprocessingML.BinaryPart;
import org.docx4j.openpackaging.parts.WordprocessingML.BinaryPartAbstractImage;

public class SaveImages  {

        public static void main(String[] args) throws Exception {

            WordprocessingMLPackage wordMLPackage = WordprocessingMLPackage.load(new java.io.File(inputfilepath));

            for (Entry<PartName, Part> entry : wordMLPackage.getParts().getParts().entrySet()) {

                if (entry.getValue() instanceof BinaryPartAbstractImage) {

                    FileOutputStream fos = new FileOutputStream( yourfile ); // TODO: you can get file extension from PartName, or part class.
                    ((BinaryPart)entry.getValue()).writeDataToOutputStream(fos);
                    fos.close();

                }


            }
        }

    }

如果您关心图像的上下文，您必须在相关部分（如MainDocumentPart，以及您的页眉/页脚部分等）中搜索它们。

https://github.com/plutext/docx4j/blob/master/src/samples/docx4j/org/docx4j/samples/imageConvertembeddedtolinked.java将为您提供如何做到这一点的提示。注意，图像有两种不同的XML结构。更新的DrawingML XML和遗留的VML。