@PostMapping("/update")
    public Result projectUpdate(@RequestBody ProjectVoEntity projectvo) throws ParseException {
        //獲取項目id
        ProjectEntity project = projectService.selectById(projectvo.getProjectid());
        //獲取項目分類id
        ClassesEntity ce = classesService.selectById(projectvo.getClassid());
        
 
//判斷項目id是否存在
        if(project!=null) {
        //時間轉換
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        //獲取創建時間
        Date ss=project.getCretime();
        //Date轉String
        String sstr = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(ss);
        //創建時間
        Date stt = sdf.parse(sstr);
        
 
//當前時間
        Date sttt = new Date(); 
        //當前時間減去創建時間
        long cha = sttt.getTime() - stt.getTime();
        boolean flag;
        if(cha<0){
            flag= false; 
            }
            double result = cha * 1.0 / (1000 * 60 * 60);
            if(result<=24){ 
                    project.setProjectid(projectvo.getProjectid());
                    project.setPname(projectvo.getPname());
                    
 
//修改項目分類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("項目ID不存在");
        }
        
        
        return Result.ok();
    }

Update修改方法判斷該ID的數據是否超過24小時，超過不許修改