问题
My document has three parts: cover, contents and text. I want to set different page number for each section. The cover does not need page numbers. The contents page numbers are in Rome numerals, and the pages in the main body are in Greek numbers. Can it be realized with POI？
回答1:
Apache poi is - until now - only abel creating three types of header / footers: HeaderFooterType.DEFAULT, .EVEN and .First.
So for fulfilling your requirement we need using the underlaying low level objects. And we need cheating a little bit to be able creating different footers.
We need two different footers. One for your section 2 (contents) and one for your section 3 (text). But both must be of type DEFAULT. Since this is not possible using apache poi until now, we are first creating two different footers of different types (FIRST and DEFAULT) for the whole document. Then we change the FIRST footer to DEFAULT and move it to be footer reference for section 2.
Example:
import java.io.FileOutputStream;
import org.apache.poi.xwpf.usermodel.*;
import org.apache.poi.wp.usermodel.HeaderFooterType;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTDocument1;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTBody;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTSectPr;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTHdrFtrRef;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.STHdrFtr;
public class CreateWordMultipleSectionPageNumbering {
public static void main(String[] args) throws Exception {
XWPFDocument document= new XWPFDocument();
//create first footer for section 2 - first created as first footer for the document
XWPFFooter footer = document.createFooter(HeaderFooterType.FIRST);
//making it HeaderFooterType.FIRST first to be able creating one more footer later
//will changing this later to HeaderFooterType.DEFAULT
XWPFParagraph paragraph = footer.getParagraphArray(0);
if (paragraph == null) paragraph = footer.createParagraph();
paragraph.setAlignment(ParagraphAlignment.CENTER);
XWPFRun run = paragraph.createRun();
run.setText("Page ");
paragraph.getCTP().addNewFldSimple().setInstr("PAGE \\* ROMAN MERGEFORMAT");
run = paragraph.createRun();
run.setText(" of ");
paragraph.getCTP().addNewFldSimple().setInstr("NUMPAGES \\* ROMAN MERGEFORMAT");
//create second footer for section 3 == last section in document
footer = document.createFooter(HeaderFooterType.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 \\* ARABIC MERGEFORMAT");
run = paragraph.createRun();
run.setText(" of ");
paragraph.getCTP().addNewFldSimple().setInstr("NUMPAGES \\* ARABIC MERGEFORMAT");
//create document content.
//section 1
paragraph = document.createParagraph();
run=paragraph.createRun();
run.setText("Cover");
//paragraph with section setting for section above
paragraph = document.createParagraph();
CTSectPr ctSectPr = paragraph.getCTP().addNewPPr().addNewSectPr();
//section 2
paragraph = document.createParagraph();
run=paragraph.createRun();
run.setText("Contents");
//paragraph with section setting for section above
paragraph = document.createParagraph();
CTSectPr ctSectPrSect2 = paragraph.getCTP().addNewPPr().addNewSectPr(); //we need this later
//section 3
paragraph = document.createParagraph();
run=paragraph.createRun();
run.setText("Text");
//section setting for section above == last section in document
CTDocument1 ctDocument = document.getDocument();
CTBody ctBody = ctDocument.getBody();
CTSectPr ctSectPrLastSect = ctBody.getSectPr(); //there must be a SectPr already because of the footer settings above
//get footer reference of first footer and move this to be footer reference for section 2
CTHdrFtrRef ctHdrFtrRef = ctSectPrLastSect.getFooterReferenceArray(0);
ctHdrFtrRef.setType(STHdrFtr.DEFAULT); //change this from STHdrFtr.FIRST to STHdrFtr.DEFAULT
CTHdrFtrRef[] ctHdrFtrRefs = new CTHdrFtrRef[]{ctHdrFtrRef};
ctSectPrSect2.setFooterReferenceArray(ctHdrFtrRefs);
ctSectPrLastSect.removeFooterReference(0);
//unset "there is a title page" for the whole document because we have a section for the title (cover)
ctSectPrLastSect.unsetTitlePg();
document.write(new FileOutputStream("CreateWordMultipleSectionPageNumbering.docx"));
}
}
Reference for used low level objects: http://grepcode.com/snapshot/repo1.maven.org/maven2/org.apache.poi/ooxml-schemas/1.1/.
The above code shows the principle. If the need is to fulfilling further requirements then one should know that a *.docx file is simply a ZIP archive which one can unzip and have a look into it. So one can using Word for creating a *.docx file which fulfils the requirements, then unzipping it and look at /word/document.xml.
For example: "How to set roman numerals start with I II and arabic numerals start with 1,2 again?"
If in Word create a Word document that uses different page numbering formats . Then in /word/document.xml you will find something like:
...
<w:sectPr>
...
<w:pgNumType w:start="1"/>
...
</w:sectPr>
...
So we need a PgNumType element in the XML for this.
Complete example again:
import java.io.FileOutputStream;
import org.apache.poi.xwpf.usermodel.*;
import org.apache.poi.wp.usermodel.HeaderFooterType;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTDocument1;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTBody;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTPPr;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTSectPr;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTHdrFtrRef;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.STHdrFtr;
public class CreateWordMultipleSectionPageNumbering {
//default section setting for page size and page borders
//measurement unit = twips (twentieth of an inch point) = 1 inch = 1440 twips
private static String defaultSectPr =
"<w:sectPr xmlns:w=\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\">"
+"<w:pgSz w:w=\"12240\" w:h=\"15840\"/>" //A4
+"<w:pgMar w:top=\"1417\" w:right=\"1417\" w:bottom=\"1134\" w:left=\"1417\""
+" w:header=\"720\" w:footer=\"720\" w:gutter=\"0\"/>"
+"<w:cols w:space=\"720\"/>"
+"</w:sectPr>";
public static void main(String[] args) throws Exception {
CTSectPr ctSectPrDefault = (CTPPr.Factory.parse(defaultSectPr)).getSectPr();
XWPFDocument document= new XWPFDocument();
//set the default section setting for page size and page borders
CTDocument1 ctDocument = document.getDocument();
CTBody ctBody = ctDocument.getBody();
ctBody.setSectPr(ctSectPrDefault);
//create first footer for section 2 - first created as first footer for the document
XWPFFooter footer = document.createFooter(HeaderFooterType.FIRST);
//making it HeaderFooterType.FIRST first to be able creating one more footer later
//will changing this later to HeaderFooterType.DEFAULT
XWPFParagraph paragraph = footer.getParagraphArray(0);
if (paragraph == null) paragraph = footer.createParagraph();
paragraph.setAlignment(ParagraphAlignment.CENTER);
XWPFRun run = paragraph.createRun();
run.setText("Page ");
paragraph.getCTP().addNewFldSimple().setInstr("PAGE \\* ROMAN MERGEFORMAT");
run = paragraph.createRun();
run.setText(" of ");
//paragraph.getCTP().addNewFldSimple().setInstr("NUMPAGES \\* ROMAN MERGEFORMAT");
paragraph.getCTP().addNewFldSimple().setInstr("SECTIONPAGES \\* ROMAN MERGEFORMAT");
//create second footer for section 3 == last section in document
footer = document.createFooter(HeaderFooterType.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 \\* ARABIC MERGEFORMAT");
run = paragraph.createRun();
run.setText(" of ");
//paragraph.getCTP().addNewFldSimple().setInstr("NUMPAGES \\* ARABIC MERGEFORMAT");
paragraph.getCTP().addNewFldSimple().setInstr("SECTIONPAGES \\* ARABIC MERGEFORMAT");
//create document content.
//section 1
paragraph = document.createParagraph();
run=paragraph.createRun();
run.setText("Cover");
//paragraph with section setting for section above
paragraph = document.createParagraph();
paragraph.getCTP().addNewPPr().setSectPr(ctSectPrDefault);
//section 2
paragraph = document.createParagraph();
run=paragraph.createRun();
run.setText("Contents");
paragraph = document.createParagraph();
run = paragraph.createRun();
run.setText("Lorem ipsum semit dolor ...");
run.addBreak(BreakType.PAGE);
paragraph = document.createParagraph();
//paragraph with section setting for section above
paragraph = document.createParagraph();
paragraph.getCTP().addNewPPr().setSectPr(ctSectPrDefault);
CTSectPr ctSectPrSect2 = paragraph.getCTP().getPPr().getSectPr(); //we need this later
//set this page numbering starting with 1 again
ctSectPrSect2.addNewPgNumType().setStart(java.math.BigInteger.valueOf(1));
//section 3
paragraph = document.createParagraph();
run=paragraph.createRun();
run.setText("Text");
paragraph = document.createParagraph();
run = paragraph.createRun();
run.setText("Lorem ipsum semit dolor ...");
run.addBreak(BreakType.PAGE);
paragraph = document.createParagraph();
//section setting for section above == last section in document
CTSectPr ctSectPrLastSect = ctBody.getSectPr();
//there must be a SectPr already because of the default and footer settings above
//set this page numbering starting with 1 again
ctSectPrLastSect.addNewPgNumType().setStart(java.math.BigInteger.valueOf(1));
//get footer reference of first footer and move this to be footer reference for section 2
CTHdrFtrRef ctHdrFtrRef = ctSectPrLastSect.getFooterReferenceArray(0);
ctHdrFtrRef.setType(STHdrFtr.DEFAULT); //change this from STHdrFtr.FIRST to STHdrFtr.DEFAULT
CTHdrFtrRef[] ctHdrFtrRefs = new CTHdrFtrRef[]{ctHdrFtrRef};
ctSectPrSect2.setFooterReferenceArray(ctHdrFtrRefs);
ctSectPrLastSect.removeFooterReference(0);
//unset "there is a title page" for the whole document because we have a section for the title (cover)
ctSectPrLastSect.unsetTitlePg();
document.write(new FileOutputStream("CreateWordMultipleSectionPageNumbering.docx"));
}
}
This also uses SECTIONPAGES field in Word insteand of NUMPAGES to numbering only the pages in single section istead of the whole document pages.
Also it uses default section settings for page size and page borders in each section. This is more compatible with different word processing applications which can read *.docx files.
来源：https://stackoverflow.com/questions/50054304/how-to-set-page-number-for-different-section-in-word-by-poi