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

public class ImageWatermark {
    public static void main(String[] args) {
        //加载Word文档
        Document doc=new Document();
        doc.loadFromFile("input.docx");

        //加载图片
        DocPicture picture = new DocPicture(doc);
        picture.loadImage("logo.png");
        picture.setTextWrappingStyle(TextWrappingStyle.Behind);//设置图片环绕方式

        //遍历所有section
        for (int n = 0; n < doc.getSections().getCount(); n++) {
            Section section = doc.getSections().get(n);

            //获取section的页眉
            HeaderFooter header = section.getHeadersFooters().getHeader();

            Paragraph paragrapg1;
            //获取或添加段落
            if(header.getParagraphs().getCount()>0)
            {
                paragrapg1 = header.getParagraphs().get(0);
            }
            else
                {
                    paragrapg1 = header.addParagraph();
                }

            //复制图片，并添加图片到段落
            for (int p = 0; p < 4; p++) {
                for (int q = 0; q < 3; q++) {
                    picture = (DocPicture)picture.deepClone();
                    picture.setVerticalPosition(50 + 150 * p);
                    picture.setHorizontalPosition(10 + 140 * q);
                    paragrapg1.getChildObjects().add(picture);
                }
            }
        }

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