如何在使用apache poi api创建word文档时以Y格式添加页码？

Question

POI API中是否指定了获取页面总数的方法,我可以在文档的页脚中添加页码,但是我无法添加总页数值.

Answer 1

页数Word依赖于很多东西,如字体大小,段落顶部/底部边距和填充,打印机设置,手动插入的分页符等.所以它不能直接存储在文件中.它将在Word渲染其页面时动态计算.

但我们可以使用页脚中的字段来计算页码和页面总数.

例:

import java.io.*;

import org.apache.poi.xwpf.usermodel.*;

import org.apache.poi.xwpf.model.XWPFHeaderFooterPolicy;

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.... page 1");

  paragraph = doc.createParagraph();
  run=paragraph.createRun();
  run.addBreak(BreakType.PAGE); 
  run.setText("Lorem ipsum.... page 2");

  paragraph = doc.createParagraph();
  run=paragraph.createRun();
  run.addBreak(BreakType.PAGE); 
  run.setText("Lorem ipsum.... page 3");

  // create header-footer
  XWPFHeaderFooterPolicy headerFooterPolicy = doc.getHeaderFooterPolicy();
  if (headerFooterPolicy == null) headerFooterPolicy = doc.createHeaderFooterPolicy();

  // create header start
  XWPFHeader header = headerFooterPolicy.createHeader(XWPFHeaderFooterPolicy.DEFAULT);

  paragraph = header.getParagraphArray(0);
  if (paragraph == null) paragraph = header.createParagraph();
  paragraph.setAlignment(ParagraphAlignment.LEFT);

  run = paragraph.createRun();  
  run.setText("The Header:");

  // create footer start
  XWPFFooter footer = headerFooterPolicy.createFooter(XWPFHeaderFooterPolicy.DEFAULT);

  paragraph = footer.getParagraphArray(0);
  if (paragraph == null) paragraph = footer.createParagraph();
  paragraph.setAlignment(ParagraphAlignment.CENTER);

  run = paragraph.createRun();  
  run.setText("Page ");
  paragraph.getCTP().addNewFldSimple().setInstr("PAGE \\* MERGEFORMAT");
  run = paragraph.createRun();  
  run.setText(" of ");
  paragraph.getCTP().addNewFldSimple().setInstr("NUMPAGES \\* MERGEFORMAT");

  doc.write(new FileOutputStream("CreateWordHeaderFooter.docx"));

 }
}

Word那时的字段 是{PAGE \* MERGEFORMAT}和{NUMPAGES \* MERGEFORMAT}.