JAXB 注释不适用于 Jackson 消息转换器

JAXB annotations not working with Jackson message converter

我有一个 spring 网络项目,我在其中更新了几个 jar,类路径同时包含 JAXB 和 Jackson XML 数据格式 jar。我正在尝试使用 Jackson XML 消息转换器从我的控制器获得预期的 XML 输出,但 JAXB 注释不起作用。有人可以帮忙吗?

包-info.java

@XmlSchema(xmlns = { 
    @XmlNs(prefix = "ac", namespaceURI = "http://www.example.com/ABC") 
    })
package com.example;

UserDemographics.java

@XmlRootElement(name = "user-demographics", namespace = "http://www.example.com/ABC")
@XmlAccessorType(XmlAccessType.FIELD)
public class UserDemographics {

    @XmlElement(name = "demographic", namespace = "http://www.example.com/ABC")
    private Set<Demographic> demographics = new TreeSet<>();

    @XmlAttribute(name="user-id")
    private int userId;

    static class Demographic{
        private String key;
        private String value;

        @XmlAttribute(name = "name")
        public String getKey() { return key; }

        @XmlValue
        public String getValue() { return value; }
    }
}

预期输出 当我明确设置 Jaxb2RootElementHttpMessageConverter

时有效
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<ac:user-demographics xmlns:ac="http://www.example.com/ABC" user-id="2">
    <ac:demographic name="ADDRESS">Mall Road</ac:demographic>
    <ac:demographic name="COUNTRY">India</ac:demographic>
</ac:user-demographics>

不正确,使用默认消息转换器(使用 MappingJackson2XmlHttpMessageConverter

<UserDemographics xmlns="">
    <demographic>
        <demographic><name>ADDRESS</name><value>Mall Road</value></demographic>
        <demographic><name>COUNTRY</name><value>India</value></demographic>
    </demographic>
</UserDemographics>

当我尝试使用以下代码设置 AnnotationIntrospector

@Override
  public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
    ObjectMapper xmlMapper = Jackson2ObjectMapperBuilder.xml().build();
    xmlMapper.setAnnotationIntrospector(
            AnnotationIntrospector.pair(
                    new JaxbAnnotationIntrospector(TypeFactory.defaultInstance()), 
                    new JacksonAnnotationIntrospector()));
    converters.add(new MappingJackson2XmlHttpMessageConverter(xmlMapper));
  }

我收到以下错误回复

<user-demographics xmlns="" xmlns="http://www.example.com/ABC" user-id="2">
    <demographic xmlns:zdef2091338567="" zdef2091338567:name="ADDRESS">Mall Road</demographic>
    <demographic xmlns:zdef112980045="" zdef112980045:name="COUNTRY">India</demographic>
</user-demographics>

如我所见,您有两个问题,一个是缺少包级前缀,这不是 supported and other is incorrect prefix which can be resolved 通过对 xml 映射器使用不同的底层 stax 库实现。

我没有看到最新版本 2.8.7 的第二个问题 xml 默认为 woodstox stax 库的数据绑定库。

如果您愿意,您始终可以从类路径中删除 xml 数据绑定库以默认为 Jaxb2RootElementHttpMessageConverter。

有些注释还没有supported