<dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-scratchpad</artifactId>
            <version>5.2.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>5.2.2</version>
        </dependency>

 public void downloadDoc(HttpServletResponse response) throws UnsupportedEncodingException {
        String baseUrl = "D:\\testDownload\\";
        String temp = "5939.docx";
        File file = new File(baseUrl + temp);
        //獲取文件名
        String filename  = file.getName();
        //獲取后綴名
        int i = filename.lastIndexOf(".");
        String extension = filename.substring(i+1);

        //設(shè)置響應(yīng)的信息
        response.reset();
        response.setCharacterEncoding("UTF-8");
        response.setHeader("Content-Disposition", "attachment;filename=" +  URLEncoder.encode(filename, "utf8"));
        response.setHeader("Pragma", "no-cache");
        response.setHeader("Cache-Control", "no-cache");
        //設(shè)置瀏覽器接受類型為流
        response.setContentType("application/octet-stream;charset=UTF-8");
        try {
            InputStream in = new FileInputStream(file);
            // 將文件寫(xiě)入輸入流
            OutputStream out = response.getOutputStream();
            if("docx".equals(extension) || "doc".equals(extension)) {
                //docx文件就以XWPFDocument創(chuàng)建
                XWPFDocument docx = new XWPFDocument(in);
                docx.write(out);
                docx.close();
            } else {
                //其他類型的文件，按照普通文件傳輸 如（zip、rar等壓縮包）
                int len;
                //一次傳輸1M大小字節(jié)
                byte[] bytes = new byte[1024];
                while ((len = in.read(bytes)) != -1) {
                    out.write(bytes  , 0 , len);
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

    }