将HTML输入日期映射到Java Object的LocalDate

Question

我有一个输入字段(类型:'date') - 我可以使用Thymeleaf将其映射到我的Object中的'LocalDate'字段吗？

宾语

public class Project {

    @Id
    private int id;

    private LocalDate startDate;

    private LocalDate endDate;
}

HTML输入

  <form action="#"
      th:action="@{|/admin/projects/add/save|}"
      th:object="${newProjects}"
      method="POST"
      class="form-horizontal">
        
    <input type="date" class="form-control" id="startDate"
                       placeholder="Project start"
                       th:field="*{startDate}"/>

    <input type="date" class="form-control" id="endDate"
                       placeholder="Project start"
                       th:field="*{endDate}"/>
                       
</form>

如何将输入字段正确映射到LocalDate startDate或endDate？

调节器

//GetMapping for Projects is also there, but I didn't paste it to keep clarity

@PostMapping("/add/save")
public String saveProject(@Valid @ModelAttribute("project") Project project,
                          BindingResult bindingResult,
                          Model model,
                          RedirectAttributes redirectAttributes) {

// bindingResult has error, because Thymeleaf can't map from the input-field to startDate

  if (!bindingResult.hasErrors()) {
      project.save(project);
      return "redirect:/admin/projects/list";
  } else {
      return "admin/projects/add";
  }
}

例外

无法将类型'java.lang.String'的属性值转换为属性'startDate'所需的类型'java.time.LocalDate'; 嵌套异常是org.springframework.core.convert.ConversionFailedException:无法从类型[java.lang.String]转换为类型[@javax.persistence.Column java.time.LocalDate],值为'2017-09-08'; 嵌套异常是java.lang.IllegalArgumentException:解析尝试失败的值[2017-09-08]

Answer 1

你有几个选择:

1 - 尝试:

@DateTimeFormat(pattern = "yyyy-MM-dd")
private LocalDate startDate;

@DateTimeFormat(pattern = "yyyy-MM-dd")
private LocalDate endDate;

2 - 使用Thymeleaf Extras