easypoi，根据模板生成word工具类

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
            <version>2.6.3</version>
        </dependency>

//XWPFDocument 转 MultipartFile(MockMultipartFile)，则需要导入
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-test</artifactId>
    <version>5.1.6.RELEASE</version>
    <scope>compile</scope>
</dependency>

 

import cn.afterturn.easypoi.entity.ImageEntity;
import cn.afterturn.easypoi.word.WordExportUtil;
import com.xxiang.digital_cloud.entity.vo.ProjectDailyVo;
import lombok.extern.slf4j.Slf4j;

import org.apache.commons.collections4.CollectionUtils;
import org.apache.commons.io.FilenameUtils;
import org.apache.poi.xwpf.usermodel.Document;
import org.apache.poi.xwpf.usermodel.XWPFDocument;
import org.apache.poi.xwpf.usermodel.XWPFPictureData;
import org.apache.xmlbeans.XmlOptions;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTBody;
import org.springframework.mock.web.MockMultipartFile;
import org.springframework.web.multipart.MultipartFile;
import java.io.*;
import java.lang.reflect.Field;
import java.net.HttpURLConnection;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Slf4j
public class WordUtils {

    /**
     * 图片大小路径设置
     * 默认长宽是200
     * @return
     */
    public static ImageEntity pictureSize(String s){
        ImageEntity imageEntity = new ImageEntity();
        imageEntity.setHeight(200);
        imageEntity.setWidth(200);
        imageEntity.setUrl(s);
        imageEntity.setType(ImageEntity.URL);
        return imageEntity;
    }

    /**
     * word提交
     * @return
     */
    public static XWPFDocument wordSubmit(String wordUrl, String wordTemplateUrl, Map<String, Object> map){
        XWPFDocument doc = null;
        try {
            doc = WordExportUtil.exportWord07(wordUrl, map);
            FileOutputStream fos = new FileOutputStream(wordTemplateUrl);
            doc.write(fos);
            fos.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return doc;
    }

    /**
     * 多个word数据合并到一个word中提交
     * @param wordUrl
     * @param wordTemplateUrl
     * @param list
     * @return
     */
    public static XWPFDocument moreWordSubmit(String wordUrl, String wordTemplateUrl, List<Map<String, Object>> list){
        XWPFDocument doc = null;
        try {
            doc = WordExportUtil.exportWord07(wordUrl, list);
            FileOutputStream fos = new FileOutputStream(wordTemplateUrl);
            doc.write(fos);
            fos.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return doc;
    }

    /**
     * 将对象转换成map
     * @param obj
     * @return
     * @throws Exception
     */
    public static Map<String, Object> objectToMap(Object obj) throws Exception {
        if (obj == null) {
            return null;
        }
        Map<String, Object> map = new HashMap<String, Object>();
        Field[] declaredFields = obj.getClass().getDeclaredFields();
        for (Field field : declaredFields) {
            field.setAccessible(true);
            map.put(field.getName(), field.get(obj));
        }
        return map;
    }

    /**
     * 删除临时文件
     *
     */
    public static void delFileWord(String filePathUrl, String FileName){
        File file = new File(filePathUrl+FileName);
        File file1 = new File(filePathUrl);
        file.delete();
        file1.delete();
    }


    /**
     * XWPFDocument 转 MultipartFile(MockMultipartFile)
     *
     * @param document 文档对象
     * @param fileName 文件名
     * @return
     */
    public static MultipartFile xwpfDocumentToMockMultipartFile(XWPFDocument document, String fileName) {
        try {
            String contentType = "text/plain";
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            document.write(bos);
            //XWPFDocument 转 byte[]
            byte[] barray = bos.toByteArray();
            //byte[] 转 InputStream
            InputStream is = new ByteArrayInputStream(barray);
            //InputStream 转 MultipartFile
            MultipartFile multipartFile = new MockMultipartFile(fileName, fileName, contentType, is);
            return multipartFile;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }


    /**
     * word文件合并
     * @param wordList
     * @return
     * @throws Exception
     */
    public static  XWPFDocument mergeWord(List<XWPFDocument> wordList) throws Exception{
        if (CollectionUtils.isEmpty(wordList)) {
            throw  new RuntimeException("待合并的word文档list为空");
        }
        XWPFDocument doc = wordList.get(0);
        int size = wordList.size();
        if (size > 1) {
            doc.createParagraph().setPageBreak(true);
            for (int i = 1; i < size; i++) {
                // 从第二个word开始合并
                XWPFDocument nextPageDoc = wordList.get(i);
                // 最后一页不需要设置分页符
                if (i != (size-1)) {
                    nextPageDoc.createParagraph().setPageBreak(true);
                }
                appendBody(doc, nextPageDoc);
            }
        }
        return doc;
    }

    private static void appendBody(XWPFDocument src, XWPFDocument append) throws Exception {
        CTBody src1Body = src.getDocument().getBody();
        CTBody src2Body = append.getDocument().getBody();
        List<XWPFPictureData> allPictures = append.getAllPictures();
        // 记录图片合并前及合并后的ID
        Map<String,String> map = new HashMap<>();
        for (XWPFPictureData picture : allPictures) {
            String before = append.getRelationId(picture);
            //将原文档中的图片加入到目标文档中
            String after = src.addPictureData(picture.getData(), Document.PICTURE_TYPE_PNG);
            map.put(before, after);
        }
        appendBody(src1Body, src2Body,map);

    }

    private static void appendBody(CTBody src, CTBody append, Map<String,String> map) throws Exception {
        XmlOptions optionsOuter = new XmlOptions();
        optionsOuter.setSaveOuter();
        String appendString = append.xmlText(optionsOuter);
        String srcString = src.xmlText();
        String prefix = srcString.substring(0,srcString.indexOf(">")+1);
        String mainPart = srcString.substring(srcString.indexOf(">")+1,srcString.lastIndexOf("<"));
        String sufix = srcString.substring( srcString.lastIndexOf("<") );
        String addPart = appendString.substring(appendString.indexOf(">") + 1, appendString.lastIndexOf("<"));
        if (map != null && !map.isEmpty()) {
            //对xml字符串中图片ID进行替换
            for (Map.Entry<String, String> set : map.entrySet()) {
                addPart = addPart.replace(set.getKey(), set.getValue());
            }
        }
        //将两个文档的xml内容进行拼接
        CTBody makeBody = CTBody.Factory.parse(prefix+mainPart+addPart+sufix);
        src.set(makeBody);
    }

    /**
     * 流式分组
     * @param dailyVoList
     * @return
     */
    public static List<List<ProjectDailyVo>> objectMap(List<ProjectDailyVo> dailyVoList){
        Map<String, List<ProjectDailyVo>> collect = dailyVoList.stream().collect(Collectors.groupingBy(ProjectDailyVo::getPhaseCombinationId));
        List<List<ProjectDailyVo>> list = new ArrayList<>();
        for (String key:collect.keySet()
             ) {
            List<ProjectDailyVo> projectDailyVos = collect.get(key);
            list.add(projectDailyVos);
        }
        return list;
    }

    public static boolean deleteDir(String path) {
        File file = new File(path);
        if (!file.exists()) {//判断是否待删除目录是否存在
            return false;
        }
        String[] content = file.list();//取得当前目录下所有文件和文件夹
        for (String name : content) {
            File temp = new File(path, name);
            if (temp.isDirectory()) {//判断是否是目录
                deleteDir(temp.getAbsolutePath());//递归调用，删除目录里的内容
                temp.delete();//删除空目录
            } else {
                if (!temp.delete()) {//直接删除文件
                    System.err.println("Failed to delete " + name);
                }
            }
        }
        return true;
    }
}