java - Spring Controller : Validation failed for object ='invoiceData' . 错误计数:4

Question

我有两个对象，Contractor，带有一个字段ContractorData，并且ContractorData有一个Invoice类型的对象列表:

Contractor
    id
    email
    ContractorData

ContractorData
    id
    FistName
    LastName
    ...
    List<InvoiceData>

对于承包商更新，我有一个基本 Controller

@GetMapping("/")
public String index(Model model, OAuth2Authentication authentication) {
    String email = String.valueOf(((LinkedHashMap<String, Object>) authentication.getUserAuthentication().getDetails()).get("email"));
    Contractor contractor = contractorRepository.findByEmail(email);
    if (contractor == null) {
        contractor = new Contractor();
        contractor.setEmail(email);
        contractorRepository.save(contractor);
    }
    model.addAttribute("contractor", contractor);
    return "index";
}

和更新 Controller :

@RequestMapping(value = "/contractor/update/{id}", method = RequestMethod.POST, produces = MediaType.APPLICATION_FORM_URLENCODED_VALUE)
        public String updateContractor(@PathVariable("id") String id, Contractor contractor, Model model) {
        Contractor contractorPO = contractorRepository.findById(id).get();
        ContractorData contractorData = ContractorData.builder()
                .firstName(contractor.getContractorData().getFirstName())
                .lastName(contractor.getContractorData().getLastName())
                .businessName(contractor.getContractorData().getBusinessName())
                .businessLocation(contractor.getContractorData().getBusinessLocation())
                .nip(contractor.getContractorData().getNip())
                .regon(contractor.getContractorData().getRegon())
                .build();
        contractorPO.setContractorData(contractorData);
        contractorRepository.save(contractorPO);
        model.addAttribute("contractor", contractorPO);
        return "index";
    }

这里一切都很完美。

但是，我有一个 Controller 通向一个页面，可以在该页面上添加 InvoiceData:

@RequestMapping(value = "/add/{id}")
public String addPage(@PathVariable("id") String id, Model model) {
    InvoiceData invoiceData = new InvoiceData();
    model.addAttribute("contractorid", id);
    model.addAttribute("invoicedata", invoiceData);
    return "add";
}

以及用于添加发票的 Controller :

 @RequestMapping(value = "/addinvoice/{id}", method = RequestMethod.POST, produces = MediaType.APPLICATION_FORM_URLENCODED_VALUE)
    public String addInvoice(@PathVariable("id") String id, InvoiceData data, Model model) {
        Contractor contractor = contractorRepository.findById(id).get();
        contractor.getInvoices().add(data);
        contractorRepository.save(contractor);
        model.addAttribute("contractor", contractor);
        return "index";
    }

在 HTML 表单方面，index.html 的表单如下所示:

 <form action="#" th:action="@{/contractor/update/{id}(id=${contractor.id})}" th:object="${contractor}" method="post">
            <ul class="form-style-1">
                <li>
                    <label>First Name<span class="required">*</span></label>
                    <input type="text" th:field="*{contractorData.firstName}" id="firstName" th:value="${contractor.contractorData?.firstName}">
                </li>
                <li>
                    <label>Last Name<span class="required">*</span></label>
                    <input type="text" th:field="*{contractorData.lastName}" id="lastName" th:value="${contractor.contractorData?.lastName}">
                </li>
                ... and more
                <li>
                    <input type="submit" value="Submit" />
                </li>
    </ul>
</form>

add.html 的表单看起来相同，但对象有所不同:

    <form action="#" th:action="@{addinvoice/{id}(id=${contractorid})}" th:object="${invoicedata}" method="post">
        <ul class="form-style-1">
            <li>
                <label>Reception date<span class="required">*</span></label>
                <input type="date" th:field="*{receptionDate}" id="receptionDate">
            </li>
            ... and more
            <li>
                <input type="submit" value="Submit" />
            </li>
        </ul>
    </form>

问题在于保存InvoiceData。当我填写表单并单击“提交”时 - 我收到错误:

出现意外错误(类型=错误请求，状态=400)。 object='invoiceData' 验证失败。错误数:4

重要编辑

在控制台输出上我也收到错误:

Field error in object 'invoiceData' on field 'contractDate': rejected value [2019-04-11]; codes [typeMismatch.invoiceData.contractDate,typeMismatch.contractDate,typeMismatch.java.util.Date,typeMismatch]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [invoiceData.contractDate,contractDate]; arguments []; default message [contractDate]]; default message [Failed to convert property value of type 'java.lang.String' to required type 'java.util.Date' for property 'contractDate'; nested exception is org.springframework.core.convert.ConversionFailedException: Failed to convert from type [java.lang.String] to type [java.util.Date] for value '2019-04-11'; nested exception is java.lang.IllegalArgumentException]

但正如我之前所说，ContractorData 更新表单一切顺利...

Answer 1

这里的问题是java.date。 因为在 html 中日期的格式是“yyyy-MM-dd”。你收到错误是因为 spring 无法将此日期转换为 java.Date。

您可能已经像这样声明了receptionDate

Date receptionDate;

现在，更改为

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