<!--    替換自己使用的版本    -->
<dependency>
	<groupId>org.apache.poi</groupId>
	<artifactId>poi</artifactId>
	<version>4.1.*</version>
</dependency>
<dependency>
	<groupId>org.apache.poi</groupId>
	<artifactId>poi-ooxml</artifactId>
	<version>4.1.*</version>
</dependency>
<!--    Word模板引擎    -->
<dependency>
	<groupId>com.deepoove</groupId>
	<artifactId>poi-tl</artifactId>
	<version>1.7.*</version>
</dependency>

import com.deepoove.poi.data.PictureRenderData;

@Data
public class DownloadDate {
    //圖片使用PictureRenderData類型
    private PictureRenderData image;
    private String name;
    private String a;
    private String b;
    private String c;
    private String d;
    private String e;
    private String f;
    private String g;
    private String h;
    private String i;
}

public interface DownloadService {
     void download(HttpServletResponse response, DownloadDTO downloadDTO) throws IOException;
}

@Service
@Slf4j
public class DownloadServiceImpl implements DownloadService {

    @Resource
    //遠(yuǎn)程調(diào)用服務(wù)
    private FeignService feignService;
    
    @Override
    public void download(HttpServletResponse response, DownloadDTO downloadDTO) throws IOException {BufferedImage、字節(jié)數(shù)組），Base64可以轉(zhuǎn)字節(jié)數(shù)組后使用
    	//通過(guò)調(diào)用其它接口獲取待寫入的數(shù)據(jù)信息
    	WordData wordData = feignService.getData(downloadDTO);
        /** 
        * 圖片可以是多種格式------------------------
        * 圖片路徑：PictureRenderData(int width, int height, String path)
        * File：PictureRenderData(int width, int height, File picture)
        * InputStream：PictureRenderData(int width, int height, String format, InputStream input)
        * BufferedImage：PictureRenderData(int width, int height, String format, BufferedImage image)
        * 字節(jié)數(shù)組：PictureRenderData(int width, int height, String format, byte[] data)
        * Base64可以轉(zhuǎn)字節(jié)數(shù)組后使用
        */

        //以Base64為例，先獲取圖片的Base64編碼（wordData.getImg是原始圖片Base64數(shù)據(jù)）
        String base64ImageData = wordData.getImg.substring(data.indexOf(",") + 1);
        //獲取圖片類型
        String format = getBase64Type(base64ImageData);
        // 將base64數(shù)據(jù)轉(zhuǎn)為字節(jié)數(shù)組
        byte[] imageBytes = Base64.getDecoder().decode(base64ImageData);
        // 將字節(jié)數(shù)組包裝成PictureRenderData
        PictureRenderData pictureRenderData = new PictureRenderData(690,530,format,imageBytes);
        //待寫入Word的數(shù)據(jù)
        DownloadDate downloadDate = new DownloadDate();
        //圖片信息
        downloadDate.setImage(pictureRenderData);
        //其它信息
        downloadDate.setName(wordData.getName());
        //...
        XWPFTemplate template = null;
        BufferedOutputStream bufferedOutputStream = null;
        ServletOutputStream outputStream = null;
        try {
        	/** 
        	* 該方法會(huì)導(dǎo)致在部分環(huán)境中資源找不到的情況，不推薦使用
        	*/
            //獲得resource路徑+模板路徑
            //String path = Objects.requireNonNull(Thread.currentThread().getContextClassLoader().getResource("")).getPath() + "word/template.docx";
            // 讀取Word模板
            //FileInputStream templateInputStream = new FileInputStream(path);
            // 模板綁定數(shù)據(jù)
            //template = XWPFTemplate.compile(templateInputStream).render(imageDownloadDate);
            
            // 從資源中加載Word模板
            try (InputStream templateInputStream = getClass().getClassLoader().getResourceAsStream("word/template.docx")) {
                if (templateInputStream != null) {
                    // 模板綁定數(shù)據(jù)
                    template = XWPFTemplate.compile(templateInputStream).render(imageDownloadDate);
                } else {
                    // 處理模板資源未找到的情況
                    log.error("Word模板資源未找到");
                    response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
                    return;
                }
            }
            //文件名
            String encodedFileName = URLEncoder.encode(System.currentTimeMillis()+"", "utf-8");
            //設(shè)置響應(yīng)信息
            response.setHeader("Content-Disposition", "attachment;filename=" + encodedFileName + ".docx");
            response.setContentType("application/vnd.openxmlformats-officedocument.wordprocessingml.document");
            response.setCharacterEncoding("utf-8");
            outputStream = response.getOutputStream();
            bufferedOutputStream = new BufferedOutputStream(outputStream);
            template.write(bufferedOutputStream);
            //清空流
            bufferedOutputStream.flush();
            outputStream.flush();
        } catch (Exception e) {
            log.info(e.getMessage());
            response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
        } finally {
            //關(guān)閉資源
            PoitlIOUtils.closeQuietlyMulti(template, bufferedOutputStream, outputStream);
        }
    }
    
    //根據(jù)base64編碼獲取圖片格式信息
    private String getBase64Type(String base64) {
        byte[] b = Base64.getDecoder().decode(base64);
        String type = ".png";
        if (0x424D == ((b[0] & 0xff) << 8 | (b[1] & 0xff))) {
            type = ".bmp";
        } else if (0x8950 == ((b[0] & 0xff) << 8 | (b[1] & 0xff))) {
            type = ".png";
        } else if (0xFFD8 == ((b[0] & 0xff) << 8 | (b[1] & 0xff))) {
            type = ".jpg";
        } else if (0x49492A00 == ((b[0] & 0xff) << 24 | (b[1] & 0xff) << 16 | (b[2] & 0xff) << 8 | (b[3] & 0xff))) {
            type = ".tif";
        }
        return type;
    }

}

@RestController
@RequestMapping("/test")
@Api(tags = "獲取商品圖片")
public class GetImageController {

    @Resource
    DownloadService downloadService;

    @PostMapping("/download")
    @ApiOperation(value = "下載Word")
    void download(HttpServletResponse response,@RequestBody DownloadDTO downloadDTO) throws IOException {
        //鑒權(quán)或其它處理
        //....
        downloadService.download(response,downloadDTO);
    }
    
}