Java poi设置页脚页码奇偶数不同展示

最近遇到一个问题，就是导出word设置页脚的页码且奇偶数不同，效果如下。

贴一下代码，记录一下。

/**
 * 创建页脚
 *
 * @param document doc对象
 * @throws IOException
 * @throws NoSuchFieldException
 * @throws IllegalAccessException
 */
public static void createFooter(XWPFDocument document) throws IOException, NoSuchFieldException, IllegalAccessException {
    Field _settings = XWPFDocument.class.getDeclaredField("settings");
    _settings.setAccessible(true);
    XWPFSettings xwpfsettings = (XWPFSettings) _settings.get(document);
    Field _ctSettings = XWPFSettings.class.getDeclaredField("ctSettings");
    _ctSettings.setAccessible(true);
    org.openxmlformats.schemas.wordprocessingml.x2006.main.CTSettings ctSettings =
            (org.openxmlformats.schemas.wordprocessingml.x2006.main.CTSettings) _ctSettings.get(xwpfsettings);
    ctSettings.addNewEvenAndOddHeaders();
    XWPFFooter footer = document.createFooter(HeaderFooterType.DEFAULT);
    //奇数
    XWPFParagraph paragraph = footer.createParagraph();
    paragraph.setAlignment(ParagraphAlignment.RIGHT);
    XWPFRun run;
    run = paragraph.createRun();
    run.setText("— ");
    CTFldChar fldChar = run.getCTR().addNewFldChar();
    fldChar.setFldCharType(STFldCharType.Enum.forString("begin"));
    setXWPFRunStyle(run, "宋体", 14);
    CTText ctText = run.getCTR().addNewInstrText();
    ctText.setStringValue("PAGE  \\* MERGEFORMAT");
    ctText.setSpace(SpaceAttribute.Space.Enum.forString("preserve"));
    setXWPFRunStyle(run, "宋体", 14);
    fldChar = run.getCTR().addNewFldChar();
    fldChar.setFldCharType(STFldCharType.Enum.forString("end"));
    run.setText(" —");
    //偶数
    XWPFParagraph paragraph1 = document.createFooter(HeaderFooterType.EVEN).createParagraph();
    paragraph1.setAlignment(ParagraphAlignment.LEFT);
    XWPFRun run1;
    run1 = paragraph1.createRun();
    run1.setText("— ");
    CTFldChar fldChar1 = run1.getCTR().addNewFldChar();
    fldChar1.setFldCharType(STFldCharType.Enum.forString("begin"));
    setXWPFRunStyle(run1, "宋体", 14);
    CTText ctText1 = run1.getCTR().addNewInstrText();
    ctText1.setStringValue("PAGE  \\* MERGEFORMAT");
    ctText1.setSpace(SpaceAttribute.Space.Enum.forString("preserve"));
    setXWPFRunStyle(run1, "宋体", 14);
    fldChar1 = run1.getCTR().addNewFldChar();
    fldChar1.setFldCharType(STFldCharType.Enum.forString("end"));
    run1.setText(" —");
}
/**
 * 设置页脚的字体样式
 *
 * @param r1       段落元素
 * @param font     字体
 * @param fontSize 字体大小
 */
private static void setXWPFRunStyle(XWPFRun r1, String font, int fontSize) {
    r1.setFontSize(fontSize);
    CTRPr rpr = r1.getCTR().isSetRPr() ? r1.getCTR().getRPr() : r1.getCTR().addNewRPr();
    CTFonts fonts = rpr.isSetRFonts() ? rpr.getRFonts() : rpr.addNewRFonts();
    fonts.setAscii(font);
    fonts.setEastAsia(font);
    fonts.setHAnsi(font);
}

参考文档： poi设置word奇偶页不同-segmentfault