如何删除页面和页脚POI Java之间的多余空间

Question

我正在创建poi word文档。我已经设置了页边距0，但是它们是底部和页脚图像之间的多余空间，我想删除此空间。我使用了无效的代码

  addNewPgMar.setLeft(BigInteger.valueOf(0));
  addNewPgMar.setRight(BigInteger.valueOf(210));
  addNewPgMar.setGutter(BigInteger.valueOf(0));
  addNewPgMar.setFooter(BigInteger.valueOf(0));
  addNewPgMar.setHeader(BigInteger.valueOf(0));

我想在图像中显示的空间下方删除此页脚。

Answer 1

您的问题与页边距无关，但与页脚中的段落设置无关。 Word段落具有每个段落后的间距以及段落中各行之间的间距的设置。如果页脚中的图片在页脚中的段落中是内联的，则段落后的间距必须为0，而间距必须为1，以避免面对您的间距。

使用apache poi 4.1.0可以通过以下方式设置：

...
XWPFParagraph paragraph...
...
paragraph.setSpacingAfter(0);
paragraph.setSpacingBetween(1d, LineSpacingRule.AUTO);
...

完整示例：

import java.io.FileOutputStream;
import java.io.FileInputStream;

import org.apache.poi.xwpf.usermodel.*;
import org.apache.poi.wp.usermodel.HeaderFooterType;
import org.apache.poi.util.Units;

import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTSectPr;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTPageSz;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTPageMar;

import java.math.BigInteger;

public class CreateWordHeaderFooterNullMargin {

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

  XWPFDocument document = new XWPFDocument();

  // the body content
  XWPFParagraph paragraph = document.createParagraph();
  XWPFRun run=paragraph.createRun();  
  run.setText("The Body");

  // create header start
  XWPFHeader header = document.createHeader(HeaderFooterType.DEFAULT);
  paragraph = header.getParagraphArray(0);
  if (paragraph == null) paragraph = header.createParagraph();
  paragraph.setSpacingAfter(0);
  paragraph.setSpacingBetween(1d, LineSpacingRule.AUTO);
  run = paragraph.createRun();  
  run.setText("The Header");

  // create footer start
  XWPFFooter footer = document.createFooter(HeaderFooterType.DEFAULT);
  paragraph = footer.getParagraphArray(0);
  if (paragraph == null) paragraph = footer.createParagraph();
  paragraph.setAlignment(ParagraphAlignment.CENTER);
  paragraph.setSpacingAfter(0);
  paragraph.setSpacingBetween(1d, LineSpacingRule.AUTO);
  run = paragraph.createRun();
  String imgFile="Chrysanthemum.jpg";
  run.addPicture(new FileInputStream(imgFile), XWPFDocument.PICTURE_TYPE_JPEG, imgFile, Units.toEMU(500), Units.toEMU(25));

  // create page margins
  CTSectPr sectPr = document.getDocument().getBody().getSectPr();
  if (sectPr == null) sectPr = document.getDocument().getBody().addNewSectPr();
  CTPageSz pageSz = sectPr.addNewPgSz(); // paper format letter
  pageSz.setW(BigInteger.valueOf(12240)); //12240 Twips = 12240/20 = 612 pt = 612/72 = 8.5"
  pageSz.setH(BigInteger.valueOf(15840)); //15840 Twips = 15840/20 = 792 pt = 792/72 = 11"
  CTPageMar pageMar = sectPr.getPgMar();
  if (pageMar == null) pageMar = sectPr.addNewPgMar();
  pageMar.setLeft(BigInteger.valueOf(720)); //720 TWentieths of an Inch Point (Twips) = 720/20 = 36 pt = 36/72 = 0.5"
  pageMar.setRight(BigInteger.valueOf(720));
  pageMar.setTop(BigInteger.valueOf(0));
  pageMar.setBottom(BigInteger.valueOf(0));
  pageMar.setFooter(BigInteger.valueOf(0));
  pageMar.setHeader(BigInteger.valueOf(0));
  pageMar.setGutter(BigInteger.valueOf(0));

  FileOutputStream out = new FileOutputStream("CreateWordHeaderFooterNullMargin.docx");
  document.write(out);
  out.close();
  document.close();

 }
}

免责声明：我不建议将页边距设为0的页面设置。大多数打印机无法打印完整尺寸的纸张。在纸张的左，右，顶部和/或底部有最小的间距的可打印区域。如果将页边距设置为0，则Word的{​​{1}}会发出警告。如果忽略该警告，则可能在下次打印时损坏打印机。即使您告知这样做，大多数打印机也不会打印到其不可打印的页面范围内。那是为了避免这种破坏。