Update修改方法判断该ID的数据是否超过24小时，超过不许修改

    @PostMapping("/update")
    public Result projectUpdate(@RequestBody ProjectVoEntity projectvo) throws ParseException {
        //获取项目id
        ProjectEntity project = projectService.selectById(projectvo.getProjectid());
        //获取项目分类id
        ClassesEntity ce = classesService.selectById(projectvo.getClassid());
        //判断项目id是否存在
        if(project!=null) {
        //时间转换
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        //获取创建时间
        Date ss=project.getCretime();
        //Date转String
        String sstr = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(ss);
        //创建时间
        Date stt = sdf.parse(sstr);
        //当前时间
        Date sttt = new Date();
        //当前时间减去创建时间
        long cha = sttt.getTime() - stt.getTime();
        boolean flag;
        if(cha<){
            flag= false;
            }
            double result = cha * 1.0 / ( *  * );
            if(result<=){
                    project.setProjectid(projectvo.getProjectid());
                    project.setPname(projectvo.getPname());
                    //修改项目分类id
                    project.setClassid(ce.getClassid());
                    project.setStartday(sdf.parse(projectvo.getStartday()));
                    project.setEndday(sdf.parse(projectvo.getStartday()));
                    project.setProanalysis(projectvo.getProanalysis());
                    project.setUnderent(projectvo.getUnderent());

                    project.setBudgetmoney(new BigDecimal(projectvo.getBudgetmoney()));
                    project.setProschedule(projectvo.getProschedule());
                    project.setProplan(projectvo.getProplan());
                    project.setYear(projectvo.getYear());
                    project.setEditstate("true");
                    projectService.updateById(project);

                flag= true;
            }else{
                flag= false;
                project.setEditstate("false");
                projectService.updateById(project);
                return Result.error("false");
            }
        }else {
            return Result.error("项目ID不存在");
        }

        return Result.ok();
    }