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?
Object
public class Project {
@Id
private int id;
private LocalDate startDate;
private LocalDate endDate;
}
HTML input
<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?
Controller
//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";
}
}
Exception
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]
3 回答
你有几个选择:
1 - 尝试:
2 - Use Thymeleaf Extras
您只能绑定可以使用简单类型定义的模型对象 . 当对象从客户端序列化到服务器时,它不知道复杂类型(
like java.time.LocalDate
),除非它们表示简单类型的内容 . 对于你的scnerio,最好的方法是将客户端HTML与服务器端java对象Dates'映射为String . 然后,您可以将String对象转换为服务器端Controller类或任何Java服务类中的java.time.LocalDate
.将
@DateTimeFormat(pattern = "yyyy-MM-dd")
注释添加到LocalDate变量可以解决问题 .