<repositories>
        <repository>
            <id>com.e-iceblue</id>
            <url>https://repo.e-iceblue.cn/repository/maven-public/</url>
        </repository>
    </repositories>
<dependencies>
    <dependency>
        <groupId>e-iceblue</groupId>
        <artifactId>spire.doc.free</artifactId>
        <version>5.1.0</version>
    </dependency>
</dependencies>

import com.spire.doc.*;
import com.spire.doc.documents.Paragraph;
import com.spire.doc.documents.TextWrappingStyle;
import com.spire.doc.fields.DocPicture;

public class DifferentImageWatermark {
    public static void main(String[] args) {
        //加載Word測試文檔
        Document doc = new Document();
        doc.loadFromFile("test.docx");

        //獲取文檔第一節(jié)
        Section section1 = doc.getSections().get(0);

        //定義水印圖片的縱向坐標位置
        float y = (float) (section1.getPageSetup().getPageSize().getHeight()/3);

        //添加圖片水印1
        HeaderFooter header1 = section1.getHeadersFooters().getHeader();//獲取頁眉
        header1.getParagraphs().clear();//刪除原有頁眉格式的段落
        Paragraph para1= header1.addParagraph();//重新添加段落
        DocPicture pic1 = para1.appendPicture("logo1.png");//加載圖片
        pic1.setTextWrappingStyle(TextWrappingStyle.Behind);//圖片置于文字下方
        pic1.setVerticalPosition(y);
        pic1.setHorizontalAlignment(ShapeHorizontalAlignment.Center);//設置圖片對齊方式

        //同理設置第二節(jié)頁眉中的圖片水印2
        Section section2 = doc.getSections().get(1);
        HeaderFooter header2 = section2.getHeadersFooters().getHeader();
        header2.getParagraphs().clear();
        Paragraph para2= header2.addParagraph();
        DocPicture pic2 = para2.appendPicture("logo2.png");
        pic2.setTextWrappingStyle(TextWrappingStyle.Behind);
        pic2.setVerticalPosition(y);
        pic2.setHorizontalAlignment(ShapeHorizontalAlignment.Center);

        //同理設置第三節(jié)中的頁眉中的圖片水印3
        Section section3 = doc.getSections().get(2);
        HeaderFooter header3 = section3.getHeadersFooters().getHeader();
        header3.getParagraphs().clear();
        Paragraph para3= header3.addParagraph();
        DocPicture pic3 = para3.appendPicture("logo3.png");
        pic3.setTextWrappingStyle(TextWrappingStyle.Behind);
        pic3.setVerticalPosition(y);
        pic3.setHorizontalAlignment(ShapeHorizontalAlignment.Center);

        //保存文檔
        doc.saveToFile("DifferentImageWatermark.docx",FileFormat.Docx_2013);
        doc.dispose();
    }
}

import com.spire.doc.*;
import com.spire.doc.documents.WatermarkLayout;
import java.awt.*;

public class Main {

 public static void main(String[] args) {
  //加載測試文檔
  Document document = new Document();
  document.loadFromFile("sample.docx");

  //插入文本水印
  InsertTextWatermark(document.getSections().get(0));

  //保存文檔
  document.saveToFile("textwatermark.docx",FileFormat.Docx );
 }
  //自定義方法指定文本水印字樣，并設置成水印
  private static void InsertTextWatermark(Section section){
   TextWatermark txtWatermark = new TextWatermark();
   txtWatermark.setText("內(nèi)部使用");
   txtWatermark.setFontSize(40);
   txtWatermark.setColor(Color.red);
   txtWatermark.setLayout(WatermarkLayout.Diagonal);
   section.getDocument().setWatermark(txtWatermark);
  }
}

import com.spire.doc.*;

public class Main {

 public static void main(String[] args) {
  //加載測試文檔
  Document document = new Document();
  document.loadFromFile("sample.docx");

  //加載需要設置成水印的圖片
  PictureWatermark picture = new PictureWatermark();
  picture.setPicture("wx.png");
  picture.setScaling(5);
  picture.isWashout(false);

  //將圖片設置成水印
  document.setWatermark(picture);
  
  //保存文檔
   document.saveToFile("imagewatermark.docx",FileFormat.Docx ); 
 }
}