java中耗时较长解决办法----使用线程池

@RequestMapping(value = "/officeSingleToOfdByFileId", method = RequestMethod.POST)
    public ResponseData officeSingleToOfdByFileId(HttpServletRequest request, HttpServletResponse response) throws Exception {
        Map map=new HashMap();
        String fileId=request.getParameter("fileId");
        map.put("oldFileId",fileId);
        String newUrul="";//访问地址
        JSONObject  obj=fileStoreInfoManager.queryOfdFile(map);//查询该文件是否转过ofd文件
        if(obj==null){
            File  file=null;
            Boolean bool=false;//用来判断是否是大文件预览
            File afterFile=null;
            String path = request.getSession().getServletContext().getRealPath("")+ File.separator+ "newofd"+File.separator+fileId+".ofd";
            //转换为ofd文件并入库
            try{
                InputStream inputStream =FileUploadUtil.getInputStreamFromFileServer(fileId);
                FileOutputStream fileOutputStream=new FileOutputStream(path);
                //获取当前查看文件的信息
                map.put("fileId",fileId);
                FileStoreInfo  fileStoreInfoDatabase=fileStoreInfoManager.queryFile(map).toJavaObject(FileStoreInfo.class);
                file=FileUploadUtil.getFile(fileStoreInfoDatabase,inputStream,request,fileId);//流获取文件
                if(file!=null){
                    OldNewfileinfo oldNewfileinfo=new OldNewfileinfo();
                    oldNewfileinfo.setRecid(UuidOpt.getUuidAsString32());
                    oldNewfileinfo.setOdlfileid(fileId);
                    oldNewfileinfo.setSummarys("office文件类型为"+fileStoreInfoDatabase.getFileType()+"转ofd");
                    oldNewfileinfo.setCreatetime(new Date());
                    //小于2M 直接转换成ofd文件
                    if(file.length()<2*1048576){
                        //小文件提前保存是为了防止文件正在转换,用户关闭页面重新打开
                        oldNewfileinfoManager.saveNewObject(oldNewfileinfo);
                        newUrul=getNewUrul(oldNewfileinfo,path,file,fileOutputStream,fileStoreInfoDatabase,inputStream,false);
                    }else{//大于50M的文件通过线程池进行转换上传，上传完处理存入库中
                        bool=true;
                        File  fileNew=file;
                        String pathNew=path;
                        oldNewfileinfo.setIsBigFile("0");
                        oldNewfileinfoManager.saveNewObject(oldNewfileinfo);
                        //使用多线程技术，提高程序的效率    有一个客户端上传文件，就开启一个线程，完成文件的上传
                        ThreadPoolExecutor threadPoolExecutor = new ThreadPoolExecutor(
                                5,
                                20,
                                5000,
                                TimeUnit.MILLISECONDS,
                                new ArrayBlockingQueue<>(5),
                                new NamedThreadFactory("thread-pool", false),
                                new ThreadPoolExecutor.AbortPolicy());
                        threadPoolExecutor.submit(new Runnable() {//
                            @SneakyThrows
                            @Override
                            public void run() {
                                getNewUrul(oldNewfileinfo,pathNew,fileNew,fileOutputStream,fileStoreInfoDatabase,inputStream,true);
                            }
                        });
                        threadPoolExecutor.shutdown();
                        newUrul="0";
                    }
                }
            } catch (NullPointerException e) {
                LOG.info("空指针异常");
            } catch (Exception e) {
                System.out.println(e.getMessage());
                System.out.println("文件转换出错");
            }finally {
                if(file!=null){
                    if(!bool){
                        file.delete();
                    }
                }
                if(afterFile!=null){
                    if(!bool){
                        afterFile.delete();
                    }
                }
            }
        }else{
            //如果是大文件类型,并且还没有查询除结果,则返回前台页面url为0
            if(String.valueOf(obj.get("isbigfile")).equals("0") && obj.get("newFileId")==null){
                newUrul="0";
            }else{
                //如果转换过无需在转换,直接查看
                newUrul=obj.get("newFileId")==null?"0":String.valueOf(obj.get("newFileId"));
            }
        }
        return ResponseData.makeResponseData(newUrul);
    }
    /** 
     * @Author qi_xq
     * @Description 办公文件转ofd文件，并且将ofd文件上传至文件服务器并且
     * @Date 9:01 2022/6/8 
     * @Param [oldNewfileinfo, path, file, fileOutputStream, fileStoreInfoDatabase, inputStream]
     * @return java.lang.String
     */
    public String getNewUrul(OldNewfileinfo oldNewfileinfo,String path,File file,FileOutputStream fileOutputStream,FileStoreInfo  fileStoreInfoDatabase,InputStream inputStream,Boolean bool)throws Exception{
        String newUrul="";
        try {
            File  afterFile=new File(path);
            String syText=CodeRepositoryUtil.getValue("SYSZ","A");
            ha.addTextMark(file,fileOutputStream,new TextInfo(syText,"宋体", 18,"#80000",45,Const.XAlign.Center,Const.YAlign.Middle),
                    new MarkPosition(100f, 200f, 100f, 50f, MarkPosition.INDEX_ALL),true,true);
            //上传文件服务器(转换之后的文件)
            FileStoreInfo fileStoreInfo=new FileStoreInfo();
            //获取原服务器文件基本信息
            fileClient=FileUploadUtil.getFileClient();
            fileStoreInfo.setFileName(fileStoreInfoDatabase.getFileName().substring(0,fileStoreInfoDatabase.getFileName().lastIndexOf("."))+".ofd");//设置文件名称
            fileStoreInfo.setFileType(".ofd");//设置文件类型
            //上传文件服务器(转换之后的ofd文件)
            fileStoreInfo= fileClient.uploadFile(fileClient.allocHttpClient(),fileStoreInfo,afterFile);

            oldNewfileinfo.setNewfileid(fileStoreInfo.getFileId());
            oldNewfileinfo.setContents(downFilePath+"/"+oldNewfileinfo.getNewfileid()+CodeRepositoryUtil.getSysConfigValue("reader"));
            oldNewfileinfo.setSummarys("office文件类型为"+fileStoreInfoDatabase.getFileType()+"转ofd");
            oldNewfileinfo.setCreatetime(new Date());
            oldNewfileinfoManager.updateObject(oldNewfileinfo);
            newUrul=fileStoreInfo.getFileId()==null?"":fileStoreInfo.getFileId();
            inputStream.close();
            fileOutputStream.close();
            file.delete();
        } catch (Exception e) {
            e.printStackTrace();
            logger.info(e.getMessage());
        }
        return newUrul;
    }

第二种线程方式

@RequestMapping(value = {"/toExportFile"},method = {RequestMethod.GET})
    public void toExportFile(HttpServletRequest request, HttpServletResponse response) throws Exception {
        CentitUserDetails ud = getLoginUser(request);
        String userCode = ud.getUserCode();
//        用户登录超时，跳转到登陆页
        if (ud == null) {
            JsonResultUtils.writeErrorMessageJson("登录失效", response);
        }else {
            Map<String, Object> map = convertSearchColumn(request);
            map.put("idStr", request.getParameter("idStr"));
            map.put("dowTime", request.getParameter("dowTime"));
            System.out.println("**map**"+map);
            new Thread() {
                @Override
                public void run() {
                    String m = "";
                    try {
                        map.put("tempPath", servletContext.getRealPath(File.separator + "temporaryFile") + File.separator + userCode+map.get("dowTime"));
                        map.put("temporaryZipFile", servletContext.getRealPath(File.separator + "temporaryZipFile") + File.separator + userCode+map.get("dowTime"));
                        map.put("tempPathWJJ", servletContext.getRealPath(File.separator + "temporaryFile") + File.separator);
                        map.put("temporaryZipFileWJJ", servletContext.getRealPath(File.separator + "temporaryZipFile") + File.separator);
                        map.put("path", servletContext.getRealPath(""));
                        System.out.println("**map2**"+map);
                        //CommUtil.delAllFiles(new File(map.get("tempPath").toString()), null);
                        //CommUtil.delAllFiles(new File(map.get("temporaryZipFile").toString() + File.separator), null);
                        dowExportFile(map, request, response);
                    } catch (Exception e) {
                        m = e.getMessage();
                        System.out.println(m);
                        System.out.println(e);
                    }
                }
            }.start();
            JsonResultUtils.writeSingleDataJson("开始处理压缩包", response);
        }
    }