如何在spring jpa中检查非空日期

import javax.persistence.*;
import javax.validation.constraints.NotNull;
import java.util.Date;

@Entity
public class YourEntity {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @NotNull
    @Temporal(TemporalType.DATE)
    private Date yourDate;

    // 其他字段和方法...
}

spring.jpa.properties.javax.persistence.validation.mode=none
spring.jpa.hibernate.ddl-auto=update

import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;

public class NotNullDateValidator implements ConstraintValidator<NotNullDate, Date> {
    @Override
    public void initialize(NotNullDate constraintAnnotation) {
        // 初始化验证器
    }

    @Override
    public boolean isValid(Date value, ConstraintValidatorContext context) {
        return value != null;
    }
}

import javax.validation.Constraint;
import javax.validation.Payload;
import java.lang.annotation.*;

@Documented
@Constraint(validatedBy = NotNullDateValidator.class)
@Target({ElementType.FIELD})
@Retention(RetentionPolicy.RUNTIME)
public @interface NotNullDate {
    String message() default "Date must not be null";
    Class<?>[] groups() default {};
    Class<? extends Payload>[] payload() default {};
}

@Entity
public class YourEntity {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @NotNullDate
    @Temporal(TemporalType.DATE)
    private Date yourDate;

    // 其他字段和方法...
}