java - 如何在 Apache POI 中调整图像环绕样式

Question

我必须创建一个 Word 文档 (docx)，并在文本后面添加图像。我设法使用以下代码添加图像:

XWPFParagraph p = doc.createParagraph();
XWPFRun r = p.createRun();
String imgFile = "image.png";
XWPFPicture picture = r.addPicture(new FileInputStream(imgFile), XWPFDocument.PICTURE_TYPE_PNG, imgFile, Units.pixelToEMU(855), Units.pixelToEMU(776));

但我可以在任何地方找到如何将其发送到文本后面(有点像背景图像或水印)。

Answer 1

尝试下面的完整代码..

import java.io.File;
import java.io.IOException;

import org.docx4j.XmlUtils;
import org.docx4j.jaxb.Context;
import org.docx4j.openpackaging.packages.WordprocessingMLPackage;
import org.docx4j.openpackaging.parts.PartName;
import org.docx4j.openpackaging.parts.WordprocessingML.HeaderPart;
import org.docx4j.openpackaging.parts.WordprocessingML.ImagePngPart;
import org.docx4j.openpackaging.parts.relationships.RelationshipsPart.AddPartBehaviour;
import org.docx4j.relationships.Relationship;
import org.docx4j.wml.Hdr;
import org.docx4j.wml.ObjectFactory;
import org.docx4j.wml.SectPr;


public class Watermark
{


    static String DOCX_OUT; 

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

        // The image to add
        imageFile = new File("d:\\1\\1.png" );  

        // Save it to
        DOCX_OUT = "d:\\1\\output.docx";

        WatermarkPicture sample = new WatermarkPicture();
        sample.addWaterMark();
    }

    static ObjectFactory factory = Context.getWmlObjectFactory();
    static File imageFile; 

    private byte[] image;    
    private WordprocessingMLPackage wordMLPackage;

    public void addWaterMark() throws Exception
    {

        image = this.getImage();

        wordMLPackage = WordprocessingMLPackage
                .createPackage();

        // A watermark is defined in the headers, which are in turn set in sectPr
        wordMLPackage.getMainDocumentPart().getContents().getBody().setSectPr(
                createSectPr() );

        File f = new File(DOCX_OUT);
        wordMLPackage.save(f);

    }

    private SectPr createSectPr() throws Exception {

        String openXML = "<w:sectPr xmlns:w=\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\" xmlns:r=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships\">"

                // Word adds the background image in each of 3 header parts
                + "<w:headerReference r:id=\"" + createHeaderPart("even").getId() + "\" w:type=\"even\"/>"
                + "<w:headerReference r:id=\"" + createHeaderPart("default").getId() + "\" w:type=\"default\"/>"
                + "<w:headerReference r:id=\"" + createHeaderPart("first").getId() + "\" w:type=\"first\"/>"

                // Word adds empty footer parts when you create a watermark, but its not necessary

//              + "<w:footerReference r:id=\"rId9\" w:type=\"even\"/>"
//              + "<w:footerReference r:id=\"rId10\" w:type=\"default\"/>"
//              + "<w:footerReference r:id=\"rId12\" w:type=\"first\"/>"

                + "<w:pgSz w:h=\"15840\" w:w=\"12240\"/>"
                + "<w:pgMar w:bottom=\"1440\" w:footer=\"708\" w:gutter=\"0\" w:header=\"708\" w:left=\"1440\" w:right=\"1440\" w:top=\"1440\"/>"
                + "<w:cols w:space=\"708\"/>"
                + "<w:docGrid w:linePitch=\"360\"/>"
            +"</w:sectPr>";

        return (SectPr)XmlUtils.unmarshalString(openXML);

    }

    private Relationship createHeaderPart(String nameSuffix) throws Exception {

        HeaderPart headerPart = new HeaderPart(new PartName("/word/header-" + nameSuffix + ".xml"));
        Relationship rel =  wordMLPackage.getMainDocumentPart().addTargetPart(headerPart);

        setHdr( headerPart);

        return rel;
    }

    private void setHdr(HeaderPart headerPart) throws Exception  {

        ImagePngPart imagePart = new ImagePngPart(new PartName("/media/background.png"));
        imagePart.setBinaryData(image);
        Relationship rel = headerPart.addTargetPart(imagePart, AddPartBehaviour.REUSE_EXISTING); // the one image is shared by the 3 header parts

        String openXML = "<w:hdr mc:Ignorable=\"w14 wp14\" xmlns:v=\"urn:schemas-microsoft-com:vml\" xmlns:w=\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\" xmlns:o=\"urn:schemas-microsoft-com:office:office\" xmlns:mc=\"http://schemas.openxmlformats.org/markup-compatibility/2006\" xmlns:r=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships\">"
                + "<w:p>"
                    + "<w:pPr>"
                        + "<w:pStyle w:val=\"Header\"/>"
                    +"</w:pPr>"
                    + "<w:r>"
                        + "<w:rPr>"
                            + "<w:noProof/>"
                        +"</w:rPr>"
                        + "<w:pict>"
                            + "<v:shapetype coordsize=\"21600,21600\" filled=\"f\" id=\"_x0000_t75\" o:preferrelative=\"t\" o:spt=\"75\" path=\"m@4@5l@4@11@9@11@9@5xe\" stroked=\"f\">"
                                + "<v:stroke joinstyle=\"miter\"/>"
                                + "<v:formulas>"
                                    + "<v:f eqn=\"if lineDrawn pixelLineWidth 0\"/>"
                                    + "<v:f eqn=\"sum @0 1 0\"/>"
                                    + "<v:f eqn=\"sum 0 0 @1\"/>"
                                    + "<v:f eqn=\"prod @2 1 2\"/>"
                                    + "<v:f eqn=\"prod @3 21600 pixelWidth\"/>"
                                    + "<v:f eqn=\"prod @3 21600 pixelHeight\"/>"
                                    + "<v:f eqn=\"sum @0 0 1\"/>"
                                    + "<v:f eqn=\"prod @6 1 2\"/>"
                                    + "<v:f eqn=\"prod @7 21600 pixelWidth\"/>"
                                    + "<v:f eqn=\"sum @8 21600 0\"/>"
                                    + "<v:f eqn=\"prod @7 21600 pixelHeight\"/>"
                                    + "<v:f eqn=\"sum @10 21600 0\"/>"
                                +"</v:formulas>"
                                + "<v:path gradientshapeok=\"t\" o:connecttype=\"rect\" o:extrusionok=\"f\"/>"
                                + "<o:lock aspectratio=\"t\" v:ext=\"edit\"/>"
                            +"</v:shapetype>"
                            + "<v:shape id=\"WordPictureWatermark835936646\" o:allowincell=\"f\" o:spid=\"_x0000_s2050\" style=\"position:absolute;margin-left:0;margin-top:0;width:467.95pt;height:615.75pt;z-index:-251657216;mso-position-horizontal:center;mso-position-horizontal-relative:margin;mso-position-vertical:center;mso-position-vertical-relative:margin\" type=\"#_x0000_t75\">"
                                + "<v:imagedata blacklevel=\"22938f\" gain=\"19661f\" o:title=\"docx4j-logo\" r:id=\"" + rel.getId() + "\"/>"
                            +"</v:shape>"
                        +"</w:pict>"
                    +"</w:r>"
                +"</w:p>"
            +"</w:hdr>";

            Hdr hdr = (Hdr)XmlUtils.unmarshalString(openXML);

            headerPart.setJaxbElement(hdr);

        }

    private byte[] getImage() throws IOException {

        // Our utility method wants that as a byte array
        java.io.InputStream is = new java.io.FileInputStream(imageFile );
        long length = imageFile.length();    
        // You cannot create an array using a long type.
        // It needs to be an int type.
        if (length > Integer.MAX_VALUE) {
            System.out.println("File too large!!");
        }
        byte[] bytes = new byte[(int)length];
        int offset = 0;
        int numRead = 0;
        while (offset < bytes.length
               && (numRead=is.read(bytes, offset, bytes.length-offset)) >= 0) {
            offset += numRead;
        }
        // Ensure all the bytes have been read in
        if (offset < bytes.length) {
            System.out.println("Could not completely read file "+imageFile.getName());
        }
        is.close();

        return bytes;
    }


}

希望这对你有帮助!谢谢您，祝您编码愉快!!!