实际请求参数不满足消息参数条件“拒绝”：reason={}答案

【问题标题】：Message Parameter conditions "rejection" not met for actual request parameters: reason={}实际请求参数不满足消息参数条件“拒绝”：reason={}
【发布时间】：2019-06-12 22:42:01
【问题描述】：

我的 Thymeleaf 模板和/或控制器有问题。

模板如下所示：

<div align="left">
    <form action="#" th:action="@{/rejection/{invoiceId}(invoiceId=${invoiceId})}" th:object="${rejection}" method="post">
        <ul class="form-style-1">
            <li>
                <label>Powód odrzucenia:<span class="required">*</span></label>
                <input type="text" th:field="*{reason}" id="reason" required>
            </li>
            <li>
                <input type="submit" value="Wyślij powód odrzucenia protokołu"/>
            </li>
        </ul>
    </form>
</div>

这里是控制器方法：

@GetMapping(params = "invoiceId", path = "/reject")
public String reject(@RequestParam("invoiceId") String invoiceId, @CurrentUser Contractor contractor, Model model) {
    InvoiceData invoiceData = invoiceDataRepository.findById(invoiceId).get();
    invoiceData.setStatus(StatusEnum.REJECTED.toString());
    invoiceDataRepository.save(invoiceData);
    Rejection rejection = new Rejection(invoiceId, null);
    model.addAttribute("contractor", contractor);
    model.addAttribute("rejection", rejection);
    return "reject";
}

@PostMapping(params = "rejection", path = "/rejection")
public String rejection(@RequestParam("rejection") Rejection rejection, @CurrentUser Contractor contractor, Model model) {
    InvoiceData invoiceData = invoiceDataRepository.findById(rejection.getInvoiceId()).get();
    model.addAttribute("contractor", contractor);
    model.addAttribute("rejection", rejection);
    emailService.sendRejectionMessage(contractor.getEmail(), invoiceData, rejection.getReason());
    logger.info("Invoice number "+ invoiceData.getInvoiceNumber() +" with ID " + invoiceData.getId() + " rejected for Contractor with ID " + contractor.getId());
    return "index";
}

当我尝试从拒绝模板发送数据时出现错误：

2019-06-12 15:04:13.451  WARN 23678 --- [nio-8080-exec-9] .w.s.m.s.DefaultHandlerExceptionResolver : Resolved [org.springframework.web.bind.UnsatisfiedServletRequestParameterException: Parameter conditions "rejection" not met for actual request parameters: reason={some text here}]

这是拒绝类：

@Data
@AllArgsConstructor
public class Rejection {

    private String invoiceId;
    private String reason;

}

我做错了什么？请求参数是一个Rejection 对象，而不仅仅是Rejection 字段reason...

【问题讨论】：

标签： java spring spring-boot httprequest thymeleaf

【解决方案1】：

您看到该错误的原因是您的@PostMapping 中有params = "rejection"。它需要一个名为 rejection 的参数，而您没有提供任何参数。只需删除它，除非您有特定的理由拥有它。

【讨论】：