需求: 添加页码

		<properties>
			<easypoi.version>4.0.0</easypoi.version>
		</properties>

        <!-- easypoi -->
        <dependency>
            <groupId>cn.afterturn</groupId>
            <artifactId>easypoi-base</artifactId>
            <version>${
    easypoi.version}</version>
        </dependency>
        <dependency>
            <groupId>cn.afterturn</groupId>
            <artifactId>easypoi-web</artifactId>
            <version>${
    easypoi.version}</version>
        </dependency>
        <dependency>
            <groupId>cn.afterturn</groupId>
            <artifactId>easypoi-annotation</artifactId>
            <version>${
    easypoi.version}</version>
        </dependency>

package com.platform.modules.sas.utils;
import org.apache.poi.xwpf.model.XWPFHeaderFooterPolicy;
import org.apache.poi.xwpf.usermodel.*;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.*;

import java.io.*;


/**
 * ClassName   FooterTest
 * Description add footer to word with poi
 * Author  Kalinda
 * Date  2020/7/1 13:54
 * Version 1.0
 */
public class FooterTest {
    

    public static void main(String[] args) {
    
        try {
    
            // file path
            File is = new File("D:/test.docx");
            FileInputStream fis = new FileInputStream(is);
            // document object
            XWPFDocument doc = new XWPFDocument(fis);

			// calling method
            createFooter(doc);
            // or this method both ok!
            // createFooter(doc);
            
            // output
            OutputStream os = new FileOutputStream("D:\\Test1.docx");
            doc.write(os);

        } catch (Exception e) {
    
            e.printStackTrace();
        }
    }

    public static void createFooter(XWPFDocument doc) {
    

        // create footer
        XWPFHeaderFooterPolicy policy = doc.getHeaderFooterPolicy();
        CTP ctpFooter = CTP.Factory.newInstance();

        XWPFParagraph[] parsFooter;

        // add style (s.th.)
        CTPPr ctppr = ctpFooter.addNewPPr();
        CTString pst = ctppr.addNewPStyle();
        pst.setVal("style21");
        CTJc ctjc = ctppr.addNewJc();
        ctjc.setVal(STJc.CENTER);
        ctppr.addNewRPr();

        // add everything from the footerXXX.xml you need
        CTR ctr = ctpFooter.addNewR();
        ctr.addNewRPr();
        CTFldChar fch = ctr.addNewFldChar();
        fch.setFldCharType(STFldCharType.BEGIN);

        ctr = ctpFooter.addNewR();
        ctr.addNewInstrText().setStringValue(" PAGE ");

        ctpFooter.addNewR().addNewFldChar().setFldCharType(STFldCharType.SEPARATE);

        ctpFooter.addNewR().addNewT().setStringValue("1");

        ctpFooter.addNewR().addNewFldChar().setFldCharType(STFldCharType.END);

        XWPFParagraph footerParagraph = new XWPFParagraph(ctpFooter, doc);

        parsFooter = new XWPFParagraph[1];

        parsFooter[0] = footerParagraph;

        policy.createFooter(XWPFHeaderFooterPolicy.DEFAULT, parsFooter);
    }
    
	public static void createDefaultFooter(final XWPFDocument document) {
    
        CTP pageNo = CTP.Factory.newInstance();
        XWPFParagraph footer = new XWPFParagraph(pageNo, document);
        
        CTPPr begin = pageNo.addNewPPr();
        begin.addNewPStyle().setVal("style21");
        begin.addNewJc().setVal(STJc.CENTER);
        
        pageNo.addNewR().addNewFldChar().setFldCharType(STFldCharType.BEGIN);
        pageNo.addNewR().addNewInstrText().setStringValue("PAGE   \\* MERGEFORMAT");
        pageNo.addNewR().addNewFldChar().setFldCharType(STFldCharType.SEPARATE);
        
        CTR end = pageNo.addNewR();
        CTRPr endRPr = end.addNewRPr();
        endRPr.addNewNoProof();
        endRPr.addNewLang().setVal("zh-CN");
        end.addNewFldChar().setFldCharType(STFldCharType.END);
        
        CTSectPr sectPr = document.getDocument().getBody().isSetSectPr() ? document.getDocument().getBody().getSectPr() : docx.getDocument().getBody().addNewSectPr();
        
        XWPFHeaderFooterPolicy policy = new XWPFHeaderFooterPolicy(document, sectPr);
        policy.createFooter(STHdrFtr.DEFAULT, new XWPFParagraph[] {
     footer });
    }
   
}