多线程导出word

    @Override
    public void batchExportWord(PreDefenceApplyDto preDefenceApplyDto) {
        SystemUserInfo loginUser = AuthorityUtil.getLoginUser();
        if (loginUser == null || StringUtils.isBlank(loginUser.getUserId())) {
            throw new ServiceException(SimpleErrorCode.UserNotLogin);
        }
        if(StringUtils.isBlank(preDefenceApplyDto.getGrade())){
            throw new ServiceException(301,"请选择年级");
        }
        String grade = preDefenceApplyDto.getGrade();
        List<String> collegeIds = preDefenceApplyDto.getCollegeIds();
        String majorId = preDefenceApplyDto.getMajorId();

        // 查询学生论文结果
        List<String> studentIds = preDefenceApplyMapper.selectHasResStu(grade,collegeIds,majorId);
        if(CollectionUtils.isEmpty(studentIds)){
            throw new ServiceException(302,"暂无审核通过的学生可导出");
        }
        //学校名称
        String schoolName = publicMapper.querySchoolName();

        FileOutputStream fileOutputStream = null;
        FileInputStream fileInputStream = null;
        BufferedInputStream bufferedInputStream = null;

        String downloadName = "情况表.zip";
        response.setContentType("application/zip;charset=utf-8");
        response.setHeader("Content-Disposition", "attachment;filename=" + Encodes.urlEncode(downloadName));
        String realPath = request.getSession().getServletContext().getRealPath("");

        try (
                OutputStream outputStream = response.getOutputStream();
                // 压缩流
                ZipOutputStream zos = new ZipOutputStream(outputStream)){

                ExecutorService cachedThreadPool = Executors.newFixedThreadPool(studentIds.size());
                CountDownLatch latch = new CountDownLatch(studentIds.size());
                for(String stuId : studentIds){
                    cachedThreadPool.submit(() -> {
                        try {
                            zipPreWord(  bufferedInputStream, zos,
                                    stuId, schoolName ,realPath);
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                        latch.countDown();
                    });
                }
                cachedThreadPool.shutdown();
                try {
                    latch.await();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
        } catch (IOException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (bufferedInputStream != null) {
                    bufferedInputStream.close();
                }
                if (fileInputStream != null) {
                    fileInputStream.close();
                }
                if (fileOutputStream != null) {
                    fileOutputStream.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    public void zipPreWord( BufferedInputStream bufferedInputStream,ZipOutputStream zos,
                           String studentId,String schoolName ,String realPath) throws IOException {


        byte[] buffer = new byte[1024];
        int len = 0;

        PreDefenceApplyVo preDefenceApplyVo = preDefenceApplyMapper.resultQuery(studentId);
        String fileName =studentId+preDefenceApplyVo.getStudentName();
        fileName=fileName.replaceAll("/", "-")+"情况表.doc";
        String filePath = realPath + File.separator + fileName;

        File outFile = new File(filePath );

        Configuration configuration = new Configuration(Configuration.getVersion());
        configuration.setDefaultEncoding("UTF-8");
        configuration.setClassForTemplateLoading(this.getClass(), "/templates");

        Template template = null;
        try {
            template = configuration.getTemplate(schoolName + "情况表2.ftl"); 
        } catch (IOException e) {
            log.error("context", e);
            throw new ServiceException(SimpleErrorCode.ExecFailure);
        }

        Map<String, Object> params = new HashMap<>();
        params.put("preDefenceApplyVo", preDefenceApplyVo);
        params.put("schoolName", schoolName);
        try {
            BufferedWriter out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(outFile)));

            template.process(params, out);
        } catch (TemplateException e) {
            e.printStackTrace();
        }


        ZipEntry zipEntry = new ZipEntry(fileName);
        bufferedInputStream = new BufferedInputStream( new FileInputStream(outFile));
        zos.putNextEntry(zipEntry);
        while ((len = bufferedInputStream.read(buffer)) != -1) {
            zos.write(buffer, 0, len);
        }

    }
    @Override
    public void exportWord(PreDefenceApplyDto preDefenceApplyDto) {
        SystemUserInfo loginUser = AuthorityUtil.getLoginUser();
        if (loginUser == null) {
            throw new ServiceException(SimpleErrorCode.UserNotLogin);
        }
        String studentId = loginUser.getUserId();
        if (preDefenceApplyDto != null && StringUtils.isNotBlank(preDefenceApplyDto.getStudentId())) {
            studentId = preDefenceApplyDto.getStudentId();
        }
        //学校名称
        String schoolName = publicMapper.querySchoolName();

        PreDefenceApplyVo preDefenceApplyVo = preDefenceApplyMapper.resultQuery(studentId);

        String fileName = schoolName + "情况表.doc";
        response.setContentType("multipart/form-data");
        response.setHeader("Content-Disposition", "attachment;fileName=" + stringToUnicode(fileName));

        String filePath = request.getSession().getServletContext().getRealPath("/");


        OutputStream outputStream = null;
        try {
            outputStream = response.getOutputStream();
        } catch (IOException e) {
            e.printStackTrace();
        }

        Configuration configuration = new Configuration(Configuration.getVersion());
        configuration.setDefaultEncoding("UTF-8");
        configuration.setClassForTemplateLoading(this.getClass(), "/templates");

        Template template = null;
        try {
            template = configuration.getTemplate(schoolName + "情况表2.ftl"); 
        } catch (IOException e) {
            log.error("context", e);
            throw new ServiceException(SimpleErrorCode.ExecFailure);
        }

        Map<String, Object> params = new HashMap<>();
        params.put("preDefenceApplyVo", preDefenceApplyVo);
        params.put("schoolName", schoolName);

        File outFile = new File(filePath + "/" + fileName);
        byte[] buffer = new byte[1024];
        int len = 0;
        BufferedInputStream bufferedInputStream = null;
        try {

            BufferedWriter out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(outFile)));

            try {
                template.process(params, out);
            } catch (TemplateException e) {
                e.printStackTrace();
            }
            FileInputStream fileInputStream = new FileInputStream(outFile);
            bufferedInputStream = new BufferedInputStream(fileInputStream);
            while ((len = bufferedInputStream.read(buffer)) != -1) {
                outputStream.write(buffer, 0, len);
            }

            out.close();
            fileInputStream.close();
            bufferedInputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            if (outFile.exists()) {
                if (!outFile.delete()) {
                    log.info("删除失败!");
                }
            }
        }

    }