关于word水印

第一，官网下载所需要的jar包 ：https://www.e-iceblue.cn/Downloads/Spire-Doc-NET.html 
解压压缩包，获取Spire.Doc.jar

第二，将Spire.Doc.jar添加

或者应用maven

<repositories>
<repository>
<id>com.e-iceblue</id>
<url>http://repo.e-iceblue.cn/repository/maven-public/</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId> e-iceblue </groupId>
<artifactId>spire.doc.free</artifactId>
<version>2.7.3</version>
</dependency>
</dependencies>

文字水印测试

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

public class Main {

public static void main(String[] args) {
//加载测试文档
Document document = new Document();
document.loadFromFile("sample.docx");

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

//保存文档
document.saveToFile("textwatermark.docx",FileFormat.Docx );
}
//自定义方法指定文本水印字样，并设置成水印
private static void InsertTextWatermark(Section section){
TextWatermark txtWatermark = new TextWatermark();
txtWatermark.setText("内部使用");
txtWatermark.setFontSize(40);
txtWatermark.setColor(Color.red);
txtWatermark.setLayout(WatermarkLayout.Diagonal);
section.getDocument().setWatermark(txtWatermark);
}
}

图片水印
import com.spire.doc.*;

public class Main {

    public static void main(String[] args) {
        //加载测试文档
        Document document = new Document();
        document.loadFromFile("sample.docx");

        //加载需要设置成水印的图片
        PictureWatermark picture = new PictureWatermark();
        picture.setPicture("wx.png");
        picture.setScaling(5);
        picture.isWashout(false);

        //将图片设置成水印
        document.setWatermark(picture);
      
        //保存文档
         document.saveToFile("imagewatermark.docx",FileFormat.Docx ); 
    }
}