<dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>3.15</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>ooxml-schemas</artifactId>
            <version>1.3</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml-schemas</artifactId>
            <version>3.15</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-scratchpad</artifactId>
            <version>3.15</version>
        </dependency>

import com.fasterxml.jackson.databind.exc.InvalidFormatException;
import org.apache.poi.util.Units;
import org.apache.poi.xwpf.usermodel.XWPFDocument;
import org.apache.poi.xwpf.usermodel.XWPFParagraph;
import org.apache.poi.xwpf.usermodel.XWPFRun;
import org.apache.xmlbeans.XmlException;
import org.openxmlformats.schemas.drawingml.x2006.main.CTGraphicalObject;
import org.openxmlformats.schemas.drawingml.x2006.wordprocessingDrawing.CTAnchor;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTBookmark;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTDrawing;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTP;
import org.w3c.dom.Node;

import java.io.*;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.List;
import java.util.Random;

public class Watermark {

    public void addWatermark() throws IOException {
        File fileTem = new File("D:/test.docx");
        InputStream iss = new FileInputStream(fileTem);
        XWPFDocument doc = new XWPFDocument(iss);
        DateFormat dateFormat = new SimpleDateFormat("yyyy 年 MM 月 dd 日");

        List<XWPFParagraph> xwpfParagraphList = doc.getParagraphs();
        //基本内容替换
        for (XWPFParagraph xwpfParagraph : xwpfParagraphList) {
                 CTP ctp = xwpfParagraph.getCTP();

            for (int dwI = 0; dwI < ctp.sizeOfBookmarkStartArray(); dwI++) {
                CTBookmark bookmark = ctp.getBookmarkStartArray(dwI);
                if (bookmark.getName().equals("year")) {

                    XWPFRun run = xwpfParagraph.createRun();
                    run.setText("dateFormat.format(tMobileWordSign.getSignDate())");

                    Node firstNode = bookmark.getDomNode();
                    Node nextNode = firstNode.getNextSibling();
                    while (nextNode != null) {
                        // 循环查找结束符
                        String nodeName = nextNode.getNodeName();
                        if (nodeName.equals("BOOKMARK_END_TAG")) {
                            break;
                        }
                        // 删除中间的非结束节点，即删除原书签内容
                        Node delNode = nextNode;
                        nextNode = nextNode.getNextSibling();

                        ctp.getDomNode().removeChild(delNode);
                    }
                    if (nextNode == null) {
                        // 始终找不到结束标识的，就在书签前面添加
                        ctp.getDomNode().insertBefore(run.getCTR().getDomNode(), firstNode);
                    } else {
                        // 找到结束符，将新内容添加到结束符之前，即内容写入bookmark中间
                        ctp.getDomNode().insertBefore(run.getCTR().getDomNode(), nextNode);
                    }
                }
            }
        }
    }

    public void  creatSealDocument() throws IOException, InvalidFormatException, org.apache.poi.openxml4j.exceptions.InvalidFormatException {

        XWPFParagraph currentParagraph = null;
        File fileTem = new File("d:\\关于在全市开展活动的通知.docx");
        InputStream iss = new FileInputStream(fileTem);
        XWPFDocument doc = new XWPFDocument(iss);

        List<XWPFParagraph> xwpfParagraphList = doc.getParagraphs();
        for (int i = 0; i < xwpfParagraphList.size(); i++) {
            XWPFParagraph x = xwpfParagraphList.get(i);
            List<CTBookmark> bookmarkList = x.getCTP().getBookmarkStartList();
            for (int j = 0; j < bookmarkList.size(); j++) {
                System.out.println(bookmarkList.get(j).getName());
                if (bookmarkList.get(j).getName().equals("sign")) {
                    currentParagraph = x;
                    break;
                }
            }
        }
        if (currentParagraph != null) {
            //添加印章图片
            XWPFRun run = currentParagraph.createRun();

            String imgFile1 = "d:\\阿狸.jpg";
            FileInputStream is1 = new FileInputStream(imgFile1);
            run.addPicture(is1, XWPFDocument.PICTURE_TYPE_JPEG, imgFile1, Units.toEMU(60), Units.toEMU(60));
            is1.close();

            CTDrawing drawing1 = run.getCTR().getDrawingArray(0);
            CTGraphicalObject graphicalobject1 = drawing1.getInlineArray(0).getGraphic();
            Random random = new Random();
            int number = random.nextInt(999) + 1;
            //拿到新插入的图片替换添加CTAnchor 设置浮动属性 删除inline属性
            CTAnchor anchor1 = getAnchorWithGraphic(graphicalobject1, "Seal" + number,
                    Units.toEMU(60), Units.toEMU(60),//图片大小
                    Units.toEMU(250), Units.toEMU(0), true);//相对当前段落位置及偏移
            drawing1.setAnchorArray(new CTAnchor[]{anchor1});//添加浮动属性
            drawing1.removeInline(0);//删除行内属性
            //添加签名图片
            run = currentParagraph.createRun();
            imgFile1 = "d:\\t1.jpg";
            FileInputStream is2 = new FileInputStream(imgFile1);
            run.addPicture(is2, XWPFDocument.PICTURE_TYPE_JPEG, imgFile1, Units.toEMU(60), Units.toEMU(60));
            is2.close();

            random = new Random();
            CTDrawing drawing2 = run.getCTR().getDrawingArray(0);
            CTGraphicalObject graphicalobject2 = drawing2.getInlineArray(0).getGraphic();
            number = random.nextInt(999) + 1;
            CTAnchor anchor2 = getAnchorWithGraphic(graphicalobject2, "Seal" + number,
                    Units.toEMU(60), Units.toEMU(40),//图片大小
                    Units.toEMU(300), Units.toEMU(-5), false);
            drawing2.setAnchorArray(new CTAnchor[]{anchor2});//添加浮动属性
            drawing2.removeInline(0);//删除行内属性

            doc.write(new FileOutputStream("d:\\关于在全市开展活动的通知2.docx"));
            iss.close();
        }
        doc.close();
    }

    public static CTAnchor getAnchorWithGraphic(CTGraphicalObject ctGraphicalObject,
                                                String deskFileName, int width, int height,
                                                int leftOffset, int topOffset, boolean behind) {

        String anchorXML =
                "<wp:anchor xmlns:wp=\"http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing\" "
                        + "simplePos=\"0\" relativeHeight=\"0\" behindDoc=\"" + ((behind) ? 1 : 0) + "\" locked=\"0\" layoutInCell=\"1\" allowOverlap=\"1\">"
                        + "<wp:simplePos x=\"0\" y=\"0\"/>"
                        + "<wp:positionH relativeFrom=\"column\">"
                        + "<wp:posOffset>" + leftOffset + "</wp:posOffset>"
                        + "</wp:positionH>"
                        + "<wp:positionV relativeFrom=\"paragraph\">"
                        + "<wp:posOffset>" + topOffset + "</wp:posOffset>" +
                        "</wp:positionV>"
                        + "<wp:extent cx=\"" + width + "\" cy=\"" + height + "\"/>"
                        + "<wp:effectExtent l=\"0\" t=\"0\" r=\"0\" b=\"0\"/>"
                        + "<wp:wrapNone/>"
                        + "<wp:docPr id=\"1\" name=\"Drawing 0\" descr=\"" + deskFileName + "\"/><wp:cNvGraphicFramePr/>"
                        + "</wp:anchor>";

        CTDrawing drawing = null;
        try {
            drawing = CTDrawing.Factory.parse(anchorXML);
        } catch (XmlException e) {
            e.printStackTrace();
        }
        CTAnchor anchor = drawing.getAnchorArray(0);
        anchor.setGraphic(ctGraphicalObject);
        return anchor;
    }

}