我正在将 Spring Boot 与 ThymeLeaf 结合使用，但无法在表单中获取正确的日期格式。
我可以格式化日期以在 HTML 元素中输出，例如
。保存用户输入的日期也有效。但将日期发送到表单以供用户更新不起作用，因为日期格式不正确。日期出现在 标签中，数据正确但格式错误。
<input id="birthDate" type="date" name="birthDate" value="20/06/1966">日期格式为 dd/MM/yyyy，HTML 表单需要 yyyy/MM/dd。
实体类：
public class Patient {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private long id;
@Column(nullable = false)
private String lastName;
@Column(nullable = false)
private String firstName;
@Column(nullable = false)
@DateTimeFormat(pattern = "yyyy-MM-dd")
private LocalDate birthDate;
// default parameterless constructor required for Entity creation
protected Patient() {
}
// All value constructor
public Patient(Long i, String ln, String fn, LocalDate bd) {
id = i;
lastName = ln;
firstName = fn;
birthDate = bd;
}
// All value constructor
public Patient(String ln, String fn, LocalDate bd) {
lastName = ln;
firstName = fn;
birthDate = bd;
}
}
服务等级：
@Service
public class PatientService {
private final PatientRepository repository;
public PatientService(PatientRepository rep) {
repository = rep;
}
public Patient createPatient(PatientCreationParameters parameters) {
Patient user = new Patient(parameters.getLastName(), parameters.getFirstName(), parameters.getBirthdate());
return repository.save(user);
}
public Patient updatePatient(Long id, PatientCreationParameters parameters) {
Patient Patient = new Patient(id, parameters.getLastName(), parameters.getFirstName(), parameters.getBirthdate());
return repository.save(Patient);
}
public Patient getPatient(Long id) {
return repository.getReferenceById(id);
}
public List<Patient> getPatients() {
return repository.findAll();
}
}
HTML 模板：
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Patients</title>
</head>
<body>
<main>
<h1>Create patient</h1>
<form th:object="${formData}" th:action="${add} ? @{/patients/create} : @{/patients/{id}/edit}" method="post">
<div>
<label for="lastName">Last name</label>
<input id="lastName" type="text" th:field="*{lastName}">
<p th:if="${#fields.hasErrors('lastName')}" th:text="${#strings.listJoin(#fields.errors('lastName'), ', ')}"></p>
</div>
<div>
<label for="firstName">First name</label>
<input id="firstName" type="text" th:field="*{firstName}">
<p th:if="${#fields.hasErrors('firstName')}" th:text="${#strings.listJoin(#fields.errors('firstName'), ', ')}"></p>
</div>
<div>
<label for="birthDate">Birth date</label>
<input id="birthDate" type="date" th:field="*{birthDate}">
<p th:if="${#fields.hasErrors('birthDate')}" th:text="${#strings.listJoin(#fields.errors('birthDate'), ', ')}"></p>
</div>
<button type="submit">Create patient</button>
</form>
</main>
</body>
</html>
修改Thymeleaf模板 更新birthDate字段的标签以确保日期格式正确。
现有
<input id="birthDate" type="date" th:field="*{birthDate}">
已更新
<input id="birthDate" type="date" th:field="*{birthDate}" th:value="${#dates.format(formData.birthDate, 'yyyy-MM-dd')}">