我正在尝试制作一个自定义注释以添加到类中的字段中。
我似乎找不到很多在字段上运行方法的方式。我对注解非常陌生，因此我什至可能会做错此事。
例如：
@Data
public class BookingForm {
private static final String DEBUG = "Booking Form";
@NameInput
private String name;
@EmailInput
private String emailAddress;
@PhoneNumberInput
private String phoneNumber;
private String bookingType;
private String bookingDate;
private String numberOfGuests;
private String message;
private BookingsPackage bookingsPackage;
public BookingForm(String name, String emailAddress, String phoneNumber, String bookingType, String bookingDate, String numberOfGuests, String message, BookingsPackage bookingsPackage) throws InvalidFieldsException {
this.name = name;
this.emailAddress = emailAddress;
this.phoneNumber = phoneNumber;
this.bookingType = bookingType;
this.bookingDate = bookingDate;
this.numberOfGuests = numberOfGuests;
this.message = message;
this.bookingsPackage = bookingsPackage;
}
}
该类是通过注入字段构造的...然后，注释应使用@EmailInput等字段值运行方法：
@Target(ElementType.FIELD)
@Retention(RetentionPolicy.RUNTIME)
public @interface EmailInput {
//Get the value of the annotated field and run a method(s).
//E.g. If email does not pass regex -> Throw custom exception.
}
这可能吗？我无法理解如何获取@interface中已注释的字段的值。
我认为也许有一种方法可以使用“ @Form”自定义注释对类进行注释，该自定义注释会获取所有已注释的字段并运行某种“开关盒” ...
Th！