java 使用 JACKSON 将 JAXB 转换为 JSON
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JAXB to JSON using HymanSON
提问by user1417746
In my application the JAXB output generates like:
在我的应用程序中，JAXB 输出生成如下：
this.marshalOut(jaxb_Object, fileOutputStream);
this.marshalOut(jaxb_Object, fileOutputStream);
this is method call to the spring Object XML Mapping Marshallers that generate XML files. Now, I also like to generate JSON files after this line. Any one have idea about generating JSON output using JAXB input.
这是对生成 XML 文件的 spring 对象 XML 映射编组器的方法调用。现在，我也喜欢在这一行之后生成 JSON 文件。任何人都知道使用 JAXB 输入生成 JSON 输出。
I found this example code online:
我在网上找到了这个示例代码：
ObjectMapper mapper = new ObjectMapper();
AnnotationIntrospector introspector = new HymansonAnnotationIntrospector();
// make deserializer use JAXB annotations (only)
mapper.getDeserializationConfig().setAnnotationIntrospector(introspector);
// make serializer use JAXB annotations (only)
mapper.getSerializationConfig().setAnnotationIntrospector(introspector);
mapper.writeValue( outputStream, jaxb_object);
The setAnnotationIntrospectoris deprecated, is there any other way of solving this problem?
本setAnnotationIntrospector已过时，是否有解决这个问题的任何其他方式？
回答by Michael Christoff
The following works (and does not use any deprecated constructors) :
以下工作（并且不使用任何已弃用的构造函数）：
ObjectMapper mapper = new ObjectMapper();
AnnotationIntrospector introspector =
new JaxbAnnotationIntrospector(mapper.getTypeFactory());
mapper.setAnnotationIntrospector(introspector);
Specifically, this line
具体来说，这条线
new JaxbAnnotationIntrospector(mapper.getTypeFactory());
uses a non-deprecated constructor. I've tested this and it successfully processes JAXB Annotations (such as @XmlTransient, in my case).
使用未弃用的构造函数。我已经对此进行了测试，它成功地处理了 JAXB 注释（例如@XmlTransient，在我的情况下）。
回答by landal79
You can use Hymanson-module-jaxb-annotationsas stated in the doc you can register a JaxbAnnotationModulemodule:
您可以使用文档中所述的Hymanson-module-jaxb-annotations您可以注册一个JaxbAnnotationModule模块：
JaxbAnnotationModule module = new JaxbAnnotationModule();
// configure as necessary
objectMapper.registerModule(module);
Doing so you can now use both JAXB annotation and Hymanson native annotation.
这样做您现在可以同时使用 JAXB 注释和 Hymanson 原生注释。
回答by molholm
If you update Hymanson to 2.0 it is not deprecated:
如果您将 Hymanson 更新到 2.0，则不会弃用：
You can see my configuration here (Spring):
你可以在这里看到我的配置（Spring）：
Registrer MappingHymanson2HttpMessageConverter in Spring 3.1.2 with JAXB annotations
Spring 3.1.2 中的注册器 MappingHymanson2HttpMessageConverter 带有 JAXB 注释
回答by McIntosh
The correct solution for me was:
对我来说正确的解决方案是：
ObjectMapper objectMapper = new ObjectMapper();
objectMapper.setAnnotationIntrospector(new JaxbAnnotationIntrospector());
回答by posdef
According to the Hymanson javadoc:
根据Hyman逊 javadoc ：
setAnnotationIntrospector
@Deprecated
public final void setAnnotationIntrospector(AnnotationIntrospector ai)
Deprecated. Since 1.8, use either withAnnotationIntrospector(AnnotationIntrospector) or Module API instead
Method for replacing existing annotation introspector(s) with specified introspector. Since this method modifies state of configuration object directly, its use is not recommended
Did you check the method withAnnotationIntrospector(AnnotationIntrospector ai)to see wheter or not it's useful in your case?
您是否检查了该方法withAnnotationIntrospector(AnnotationIntrospector ai)以查看它对您的情况是否有用？
