spring - How to give default date values in requestparam in spring

Question

@RequestMapping(value = "/getSettlements", method = RequestMethod.GET, headers = "Accept=application/json")
  public @ResponseBody
            Collection<Settlement> getSettlements
            (@RequestParam(value = "startDate") String startDate,
            @RequestParam(value = "endDate") String endDate,
            @RequestParam(value = "merchantIds", defaultValue = "null") String merchantIds)

How to give today's date in defaultValue ? It only takes constant.

Answer 1

@InitBinder
public void initBinder(WebDataBinder binder) throws Exception {
    final DateFormat df = new SimpleDateFormat("yyyy-MM-dd");
    final CustomDateEditor dateEditor = new CustomDateEditor(df, true) {
        @Override
        public void setAsText(String text) throws IllegalArgumentException {
            if ("today".equals(text)) {
                setValue(new Date());
            } else {
                super.setAsText(text);
            }
        }
    };
    binder.registerCustomEditor(Date.class, dateEditor);
}

---

@RequestParam(required = false, defaultValue = "today") Date startDate

Answer 2

我几乎尝试了所有选项，甚至使用拦截器。但到目前为止，最简单的解决方案是使用 SpEL。例如：defaultValue = "#{new java.util.Date()}"

Answer 3

如果您使用LocalDate，您可以创建一个默认值，如下所示：

@RequestParam(name = "d", defaultValue = "#{T(java.time.LocalDate).now()}", required = true) LocalDate d)

Answer 4

由于您收到一个字符串，您可以使用任何您想要的日期格式，然后使用格式来提取日期