对于Integer，XmlElement required = true不起作用 [英] XmlElement required = true for Integer doesn't work

问题描述

我使用jax-rs服务。我的类中有两个用@XmlElement注释的字段（required = true），一个用于布尔值，另一个用于Integer。但是如果我发送没有值的xml标签，对于布尔我收到空，但对于整数我收到0

I use jax-rs service. I have two fields in my class annotated with @XmlElement(required = true), one for Boolean, another for Integer. but if I send xml tags without value, for boolean I receive null, but for Integer I receive 0

@XmlElement(required = true)
private Integer intValue;

@XmlElement(required = true)
private Boolean booleanValue;

为什么我在整数中没有收到空？

why I'm not receive null in Integer?

推荐答案

我应该添加defaultValue =null

I just should added defaultValue = "null"

@XmlElement(required = true, defaultValue = "null")
private Integer intValue;

整数字段有'有趣'（不是预期的）行为。我找不到在jaxb中为默认整数赋值的解释。

There are 'interesting' (not expected) behavior of Integer fields. I can not find an explanation for what values ​​are assigned to the default Integers in jaxb.

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