/**
 * 文件或圖片預覽/下載工具類
 * @author zh、
 * @data 2024/1/11 18:35
 */
@Component
@Slf4j
public class FileHttpUtil {
    /**
     * 根據物理路徑文件 獲取 下載/預覽 文件
     * @param file 文件
     * @param type 設置響應頭類型 "inline"查看  "attachment"下載
     * @param fileName 文件名 
     * @return 對應類型響應文件
     */
    public static ResponseEntity<?> getResponseEntity(byte[] file , String type , String fileName ){
        ResponseEntity.BodyBuilder responseEntity = ResponseEntity.ok();
        HttpHeaders httpHeaders = new HttpHeaders();
        Tika tika = new Tika();
        String mediaType = tika.detect(file);
        httpHeaders.setContentType(MediaType.parseMediaType(mediaType));
        httpHeaders.setContentDisposition(ContentDisposition.builder(type)
                .filename(URLEncoder.encode(fileName )).build());
        httpHeaders.setCacheControl(CacheControl.noCache());
        //httpHeaders.setCacheControl(CacheControl.maxAge(10, TimeUnit.MINUTES));
        return responseEntity.headers(httpHeaders).body(file );
    }
需要的pom依賴文件
	<dependency>
      <groupId>org.apache.tika</groupId>
      <artifactId>tika-core</artifactId>
      <version>1.28.4</version>
    </dependency>

  /**
     * 查詢文件
     * @param filePath文件地址 物理路徑
     * @param type 設置響應頭類型  "inline"查看  "attachment"下載
     * @return 響應文件
     * @throws IOException
     */
    @GetMapping(value = "/file")
    public ResponseEntity<?> file(String filePath,String type){
   		 //根據文件路徑去文件服務獲取文件
        File file = new File(filePath);
        try (FileInputStream fileInputStream = new FileInputStream(file)) {
            byte[] buf = new byte[fileInputStream.available()];
            fileInputStream.read(buf);
            return FileHttpUtil.getResponseEntity(buf, type,file .getName());
        } catch (IOException e) {
             e.printStackTrace();
        }
    }