通过XMLJavaTypeAdapter

问题描述

我正在使用XMLAdapter将请求正文中的值解析为LocalDateTime。 有什么方法可以为其创建自定义异常，尤其是DateTimeParseException？

---

public class LocalDateTimeAdapter extends XmlAdapter<String,LocalDateTime> {
final DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy/MM/dd HH:mm:ss");

    @Override
    public String marshal(LocalDateTime v) throws Exception {
        return v.format(formatter);
    }

    @Override
    public LocalDateTime unmarshal(String v) throws Exception {
        return LocalDateTime.parse(v,formatter);
    }

}

---

@JsonFormat(shape = Shape.STRING,pattern = "yyyy/MM/dd HH:mm:ss")
@JsonDeserialize(using = CustomDateDeserializer.class)
@JsonProperty("ge")
@XmlElement(name = "ge")
@XmlJavaTypeAdapter(LocalDateTimeAdapter.class)
private LocalDateTime ge;

@JsonFormat(shape = Shape.STRING,pattern = "yyyy/MM/dd HH:mm:ss")
@JsonDeserialize(using = CustomDateDeserializer.class)
@JsonProperty("le")
@XmlElement(name = "le")
@XmlJavaTypeAdapter(LocalDateTimeAdapter.class)
private LocalDateTime le;

解决方法

要处理自定义异常，我在XMLAdapter的顶部创建了自己的LocalDateTime验证器。验证是否为null，这意味着在XMLAdapter期间发生了DateTimeParseException。

---

public class LocalDateTimeFormatValidator implements ConstraintValidator<LocalDateTimeFormat,Object> {

    @Override
    public boolean isValid(Object value,ConstraintValidatorContext context) {
        if (value != null) {
            return true;
        } else {
            throw new <YourException>(StringUtils.EMPTY,"Your Message");
        }
    }

}

---

@Target(ElementType.FIELD)
@Retention(RetentionPolicy.RUNTIME)
@Constraint(validatedBy = LocalDateTimeFormatValidator.class)
public @interface LocalDateTimeFormat {
    String message() default "Invalid  Date format.";

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

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

---

@JsonFormat(shape = Shape.STRING,pattern = "yyyy/MM/dd HH:mm:ss")
@JsonDeserialize(using = CustomDateDeserializer.class)
@JsonProperty("ge")
@LocalDateTimeFormat
@XmlElement(name = "ge",nillable = true)
@XmlJavaTypeAdapter(LocalDateTimeAdapter.class)
private LocalDateTime ge;

@JsonFormat(shape = Shape.STRING,pattern = "yyyy/MM/dd HH:mm:ss")
@JsonDeserialize(using = CustomDateDeserializer.class)
@JsonProperty("le")
@LocalDateTimeFormat
@XmlElement(name = "le",nillable = true)
@XmlJavaTypeAdapter(LocalDateTimeAdapter.class)
private LocalDateTime le;