使用POI XWPF将图像添加到Word .docx文档标题中

Z时代
2024-01-10
分类：问答

我一直在尝试使用Apache POI将.png图片添加到.docx文件头中。我没有找到对我有帮助的方法。有人知道怎么做吗？这段代码我只能添加文本。

XWPFDocument docc = new XWPFDocument(); 
CTP ctpHeader = CTP.Factory.newInstance(); 
CTR ctrHeader = ctpHeader.addNewR(); 
CTText ctHeader = ctrHeader.addNewT(); 
String headerText = "mi encabezado"; 
ctHeader.setStringValue(headerText);
XWPFParagraph headerParagraph = new XWPFParagraph(ctpHeader, docc); XWPFParagraph[] parsHeader = new XWPFParagraph[1]; 
parsHeader[0] = headerParagraph; header.createHeader(XWPFHeaderFooterPolicy.DEFAULT, parsHeader);

回答：

Word使用页眉和页脚以及页眉中的图像创建文档的示例：

import java.io.FileOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import org.apache.poi.util.Units;
import org.apache.poi.xwpf.usermodel.*;
import org.apache.poi.xwpf.model.XWPFHeaderFooterPolicy;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTSectPr;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTTabStop;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.STTabJc;
import java.math.BigInteger;
public class CreateWordHeaderFooter {
 public static void main(String[] args) throws Exception {
  XWPFDocument doc= new XWPFDocument();
  // the body content
  XWPFParagraph paragraph = doc.createParagraph();
  XWPFRun run=paragraph.createRun();  
  run.setText("The Body:");
  paragraph = doc.createParagraph();
  run=paragraph.createRun();  
  run.setText("Lorem ipsum....");
  // create header start
  CTSectPr sectPr = doc.getDocument().getBody().addNewSectPr();
  XWPFHeaderFooterPolicy headerFooterPolicy = new XWPFHeaderFooterPolicy(doc, sectPr);
  XWPFHeader header = headerFooterPolicy.createHeader(XWPFHeaderFooterPolicy.DEFAULT);
  paragraph = header.getParagraphArray(0);
  paragraph.setAlignment(ParagraphAlignment.LEFT);
  CTTabStop tabStop = paragraph.getCTP().getPPr().addNewTabs().addNewTab();
  tabStop.setVal(STTabJc.RIGHT);
  int twipsPerInch =  1440;
  tabStop.setPos(BigInteger.valueOf(6 * twipsPerInch));
  run = paragraph.createRun();  
  run.setText("The Header:");
  run.addTab();
  run = paragraph.createRun();  
  String imgFile="Koala.png";
  run.addPicture(new FileInputStream(imgFile), XWPFDocument.PICTURE_TYPE_PNG, imgFile, Units.toEMU(50), Units.toEMU(50));
  // create footer start
  XWPFFooter footer = headerFooterPolicy.createFooter(XWPFHeaderFooterPolicy.DEFAULT);
  paragraph = footer.getParagraphArray(0);
  paragraph.setAlignment(ParagraphAlignment.CENTER);
  run = paragraph.createRun();  
  run.setText("The Footer:");
  doc.write(new FileOutputStream("test.docx"));
 }
}

这一直有效，直到Apache poi 3.13。现在，在3.14版本中，它的工作方式不再更多。原因：POI将不再在标题段落中保存图像的blip参考。

/word/header1.xml：

使用3.13编译并运行的代码：

...
<pic:blipFill><a:blip r:embed="rId1"/>
...

使用3.14编译并运行的相同代码：

...
<pic:blipFill><a:blip r:embed=""/>
...

找到了问题。有人认为public final PackageRelationship

getPackageRelationship()需要弃用。因此在XWPFRun.java代码中public XWPFPicture

addPicture(...)已更改

从3.13版开始：

...
            CTBlipFillProperties blipFill = pic.addNewBlipFill();
            CTBlip blip = blipFill.addNewBlip();
            blip.setEmbed(picData.getPackageRelationship().getId());
...

到版本3.14：

...
            CTBlipFillProperties blipFill = pic.addNewBlipFill();
            CTBlip blip = blipFill.addNewBlip();
            blip.setEmbed(parent.getDocument().getRelationId(picData));
...

但parent.getDocument()就是XWPFDocument永远，而picData可能是关系到XWPFHeaderFooter。

public XWPFPicture addPicture(...)程序员一开始就已经知道这一点。

...
        if (parent.getPart() instanceof XWPFHeaderFooter) {
            XWPFHeaderFooter headerFooter = (XWPFHeaderFooter)parent.getPart();
            relationId = headerFooter.addPictureData(pictureData, pictureType);
            picData = (XWPFPictureData) headerFooter.getRelationById(relationId);
        } else {
            XWPFDocument doc = parent.getDocument();
            relationId = doc.addPictureData(pictureData, pictureType);
            picData = (XWPFPictureData) doc.getRelationById(relationId);
        }
...

因此，如果确实应执行折旧，if..else则在设置blipID时也必须使用此折旧。但是为什么要贬值呢？

Apache POI 3.14版本 大声笑

import java.io.FileOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import org.apache.poi.util.Units;
import org.apache.poi.xwpf.usermodel.*;
import org.apache.poi.xwpf.model.XWPFHeaderFooterPolicy;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTSectPr;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTTabStop;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.STTabJc;
import java.math.BigInteger;
public class CreateWordHeaderFooter {
 public static void main(String[] args) throws Exception {
  XWPFDocument doc= new XWPFDocument();
  // the body content
  XWPFParagraph paragraph = doc.createParagraph();
  XWPFRun run=paragraph.createRun();  
  run.setText("The Body:");
  paragraph = doc.createParagraph();
  run=paragraph.createRun();  
  run.setText("Lorem ipsum....");
  // create header start
  CTSectPr sectPr = doc.getDocument().getBody().addNewSectPr();
  XWPFHeaderFooterPolicy headerFooterPolicy = new XWPFHeaderFooterPolicy(doc, sectPr);
  XWPFHeader header = headerFooterPolicy.createHeader(XWPFHeaderFooterPolicy.DEFAULT);
  paragraph = header.getParagraphArray(0);
  paragraph.setAlignment(ParagraphAlignment.LEFT);
  CTTabStop tabStop = paragraph.getCTP().getPPr().addNewTabs().addNewTab();
  tabStop.setVal(STTabJc.RIGHT);
  int twipsPerInch =  1440;
  tabStop.setPos(BigInteger.valueOf(6 * twipsPerInch));
  run = paragraph.createRun();  
  run.setText("The Header:");
  run.addTab();
  run = paragraph.createRun();  
  String imgFile="Koala.png";
  XWPFPicture picture = run.addPicture(new FileInputStream(imgFile), XWPFDocument.PICTURE_TYPE_PNG, imgFile, Units.toEMU(50), Units.toEMU(50));
  System.out.println(picture); //XWPFPicture is added
  System.out.println(picture.getPictureData()); //but without access to XWPFPictureData (no blipID)
  String blipID = "";
  for(XWPFPictureData picturedata : header.getAllPackagePictures()) {
   blipID = header.getRelationId(picturedata);
   System.out.println(blipID); //the XWPFPictureData are already there
  }
  picture.getCTPicture().getBlipFill().getBlip().setEmbed(blipID); //now they have a blipID also
  System.out.println(picture.getPictureData());
  // create footer start
  XWPFFooter footer = headerFooterPolicy.createFooter(XWPFHeaderFooterPolicy.DEFAULT);
  paragraph = footer.getParagraphArray(0);
  paragraph.setAlignment(ParagraphAlignment.CENTER);
  run = paragraph.createRun();  
  run.setText("The Footer:");
  doc.write(new FileOutputStream("test.docx"));
 }
}

在apache poi3.16 Beta 2版中，此问题似乎已解决，因为以下代码在apache poi3.16 Beta 2版中有效：

import java.io.FileOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import org.apache.poi.util.Units;
import org.apache.poi.xwpf.usermodel.*;
import org.apache.poi.xwpf.model.XWPFHeaderFooterPolicy;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTSectPr;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTTabStop;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.STTabJc;
import java.math.BigInteger;
public class CreateWordHeaderFooter2 {
 public static void main(String[] args) throws Exception {
  XWPFDocument doc= new XWPFDocument();
  // the body content
  XWPFParagraph paragraph = doc.createParagraph();
  XWPFRun run=paragraph.createRun();  
  run.setText("The Body:");
  paragraph = doc.createParagraph();
  run=paragraph.createRun();  
  run.setText("Lorem ipsum....");
  // create header start
  CTSectPr sectPr = doc.getDocument().getBody().addNewSectPr();
  XWPFHeaderFooterPolicy headerFooterPolicy = new XWPFHeaderFooterPolicy(doc, sectPr);
  XWPFHeader header = headerFooterPolicy.createHeader(XWPFHeaderFooterPolicy.DEFAULT);
  paragraph = header.createParagraph();
  paragraph.setAlignment(ParagraphAlignment.LEFT);
  CTTabStop tabStop = paragraph.getCTP().getPPr().addNewTabs().addNewTab();
  tabStop.setVal(STTabJc.RIGHT);
  int twipsPerInch =  1440;
  tabStop.setPos(BigInteger.valueOf(6 * twipsPerInch));
  run = paragraph.createRun();  
  run.setText("The Header:");
  run.addTab();
  run = paragraph.createRun();  
  String imgFile="Koala.png";
  run.addPicture(new FileInputStream(imgFile), XWPFDocument.PICTURE_TYPE_PNG, imgFile, Units.toEMU(50), Units.toEMU(50));
  // create footer start
  XWPFFooter footer = headerFooterPolicy.createFooter(XWPFHeaderFooterPolicy.DEFAULT);
  paragraph = footer.createParagraph();
  paragraph.setAlignment(ParagraphAlignment.CENTER);
  run = paragraph.createRun();  
  run.setText("The Footer:");
  doc.write(new FileOutputStream("test.docx"));
 }
}