计算SpringEL表达式时出现异常：“#dates.format(Passation.DatePassation,'dd-mmm-yyyy')”

Question

我想添加日期，但在保存计算SpringEL表达式的表单异常时出错：“#dates.format(Passation.DatePassation,'dd-mmm-yyyy')”

1-胸腺嘧啶：

`<label>Date:</label>
 <label 
 th:object="${passation}" 
 th:value="${#dates.format(passation.datepassation, 'dd-MMM-yyyy')}" ></label>

2级通行

@DateTimeFormat(pattern = "yyyy-MM-dd")
private Date datepassation;

   @Autowired(required=true)
   private PassationRepository passationRepository;
  @RequestMapping(value="/passation",method=RequestMethod.GET)
  public String passation(Model model){

    List<Passation> passations=passationRepository.findAll();
    model.addAttribute("listPassations",passations);

    model.addAttribute("Date",new Date());    //add new date
    return "passation";
}

“谢谢你的帮助！

Answer 1

变量passation为空。因此，无论您如何创建bean，请确保passation不为null，并且在bean上设置了datepassation。

@Autowired
private PassationRepository passationRepository;

@GetMapping("/passation") //note shorthand
public String passation(Model model) {

   List<Passation> passations = passationRepository.findAll();
   model.addAttribute("listPassations", passations);

   // This should be in your service layer.  Example only:
   Passation passation = new Passation();
   passation.setDatepassation(new Date());

   //make sure the model has the bean
   model.addAttribute("passation", passation); 
   return "passation";
}

这个HTML将打印bean中的值。

<label>Date:</label>
<span th:text="${#dates.format(passation.datepassation, 'dd-MMM-yyyy')}">No date found</span>

如果希望更新bean值，请在

标记中使用 th:object。