太简单了，下面是现成的代码，直接拷贝就能用，具体细节可参考博主这篇文章

import static java.lang.annotation.ElementType.ANNOTATION_TYPE;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.PARAMETER;
import static java.lang.annotation.ElementType.TYPE_USE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import java.text.ParseException;
import java.text.SimpleDateFormat;

import javax.validation.Constraint;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import javax.validation.Payload;

@Target({ FIELD, METHOD, PARAMETER, ANNOTATION_TYPE, TYPE_USE })
@Retention(RUNTIME)
@Constraint(validatedBy = DateTimeFormat.CheckDateTimeFormatValidator.class)
public @interface DateTimeFormat {

	String message() default "时间格式错误";

	String value();

	Class<?>[] groups() default {};

	Class<? extends Payload>[] payload() default {};

	class CheckDateTimeFormatValidator implements ConstraintValidator<DateTimeFormat, String> {

		private String format;

		@Override
		public void initialize(DateTimeFormat constraintAnnotation) {
			this.format = constraintAnnotation.value();
		}

		@Override
		public boolean isValid(String value, ConstraintValidatorContext context) {
			if (value == null || value.isEmpty()) {
				return true;
			}
			boolean convertSuccess = true;
			SimpleDateFormat sdf = new SimpleDateFormat(this.format);
			try {
				sdf.setLenient(false);
				sdf.parse(value);
			} catch (ParseException e) {
				convertSuccess = false;
			}
			return convertSuccess;
		}
	}

}