Poi-tl实现模板签章功能，并对签章图片进行旋转

package com.test;

import com.deepoove.poi.XWPFTemplate;
import com.deepoove.poi.xwpf.NiceXWPFDocument;
import lombok.extern.slf4j.Slf4j;
import org.apache.poi.common.usermodel.PictureType;
import org.apache.poi.openxml4j.exceptions.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.CTDrawing;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTR;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Random;

/**
 * @ClassName GenSealUtil
 * @Description word生成签章，暂时只支持签章为png格式，可以进行签章弧度随机变化功能
 * @Author RayLiang
 * @Date 2022/11/8 15:12
 * @Version 1.0
 **/
@Slf4j
public class GenSealUtil {

    /**
     * 盖章旋转角度集合
     */
    static int[] rotateRandom = new int[]{0,5,15,20,25,30,35,40,45,50};
    /**
     *
     * @param template  模板对象
     * @param sealInputStream 签章输入流
     * @param paragraphFlag  段落标识
     * @param fieldName     填充属性标签
     * @param pointWidth    宽
     * @param pointHeight   高
     * @param leftOffset    水平偏移 left
     * @param topOffset     垂直偏移 top
     * @param deleteParagraphFlag  是否替换删除段落标识
     */
    public static void genSeal(XWPFTemplate template, InputStream sealInputStream,String paragraphFlag,String fieldName,int pointWidth,int pointHeight,int leftOffset,int topOffset,boolean deleteParagraphFlag){
        //获取模板
        NiceXWPFDocument newDoc = template.getXWPFDocument();

        //签章
        XWPFParagraph paragraph = null;

        List xwpfParagraphList = newDoc.getParagraphs();

        for (XWPFParagraph x : xwpfParagraphList) {
            String text = x.getText();
            if (text.contains(paragraphFlag)) {
                paragraph = x;
                if(dele