Resteasy和Jackson忽略了JAXB注释

Question

我正在将Ant RestEasy项目转换为Maven.我有大部分时间再次运行,有一个问题.JSON输出不像以前那样工作.例如,这是一个获得输出的简单实体:

import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement(name = "site-recode")
public class SiteRecode {
    @XmlElement(name = "site", required = true)
    protected String _site;
    @XmlElement(name = "hist", required = true)
    protected String _hist;
    @XmlElement(name = "ks_and_meso", required = true)
    protected Boolean _withKsAndMeso;
    @XmlElement(name = "site-group", required = true)
    protected String _siteGroup;

    public SiteRecode() {
    }

    public SiteRecode(String site, String hist, Boolean withKsAndMeso, String siteGroup) {
        this._site = site;
        this._hist = hist;
        this._withKsAndMeso = withKsAndMeso == null ? Boolean.TRUE : withKsAndMeso;
        this._siteGroup = siteGroup;
    }

}

这是我用于RestEasy的上下文解析器:

@Provider
@Produces(MediaType.APPLICATION_JSON)
public class JacksonContextResolver implements ContextResolver<ObjectMapper> {

    private ObjectMapper _objectMapper;

    public JacksonContextResolver() {
        _objectMapper = new ObjectMapper();
        _objectMapper.setAnnotationIntrospector(new JaxbAnnotationIntrospector());
    }

    public ObjectMapper getContext(Class<?> objectType) {
        return _objectMapper;
    }
}

在我们的旧Ant构建下,JSON和XML输出都很有效.XML输出仍然完美.现在,如果我尝试获取JSON,我会收到此异常:

引起:org.codehaus.jackson.map.JsonMappingException:找不到类com.imsweb.seerapi.siterecode.SiteRecode的序列化器,并且没有发现创建BeanSerializer的属性(为了避免异常,请禁用SerializationConfig.Feature.FAIL_ON_EMPTY_BEANS))

我发现了两件事.

• 如果我将字段从protected更改为public,我会得到输出.但是名称错误(忽略注释中的名称):

{ "_hist": "9650", "_site": "C379", "_siteGroup": "33011", "_withKsAndMeso": true }

• 另一个有用的方法是添加getter和setter并将@XmlElement注释移动到那里.我不再获得异常,但名称基于方法名称而不是注释:

{ "hist": "9650", "site": "C379", "siteGroup": "33011", "withKsAndMeso": true }

所以基本上它完全忽略了我的注释.如果它们是公共的,它将显示默认的命名字段/方法.

但是,XML输出仍然可以完美地工作并且遵循注释名称:

<site-recode>
    <site>C379</site>
    <hist>9650</hist>
    <ks_and_meso>true</ks_and_meso>
    <site-group>33011</site-group>
</site-recode>

我看过Ant和Maven生成的WAR文件,我无法弄清楚我在做什么不同.有没有人见过这样的东西？谢谢.

更新:

我想到了.我忘了在pom.xml中正确设置清单.我只需要添加:

<manifestEntries>
     <Dependencies>org.codehaus.jackson.jackson-xc,org.codehaus.jackson.jackson-mapper-asl,org.codehaus.jackson.jackson-core-asl,org.apache.commons.logging export,org.apache.log4j export</Dependencies>
</manifestEntries>