[英]Jackson unable to consider @XmlElement while serializing to JSON
我有一個合同類,其中包含帶有@XmlElement標記的元素。 對於前者
@XmlElement(name = "balancemoney")
protected Amount balanceMoney;
使用JAXBContext,我能夠使用適當的標簽生成xml。
但是,當我使用jackson提供的庫時,JSON標記仍然以'balanceMoney'而不是'balancemoney'形式出現
如何告訴Jackson考慮@XmlElement標記。
下面是執行此操作的代碼。
//Function to display request object.
public void displayXML(Object reqResp){
try{
JAXBContext jaxbContext = JAXBContext.newInstance(reqResp.getClass());
Marshaller jaxbMarshaller = jaxbContext.createMarshaller();
// output pretty printed
jaxbMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
ByteArrayOutputStream bStream=new ByteArrayOutputStream();
//jaxbMarshaller.marshal(reqResp, System.out);
jaxbMarshaller.marshal(reqResp,bStream );
logger.info(bStream.toString());
}catch(JAXBException e){
logger.info(e.getMessage());
}
logger.info("*** Payload is: " + reqResp.toString());
}
//Function to display as JSON
public void displayJSON(Object reqResp) throws JsonGenerationException, JsonMappingException, IOException{
ObjectMapper mapper = new ObjectMapper();
logger.info(mapper.defaultPrettyPrintingWriter().writeValueAsString(reqResp));
}
Maven依賴--pom.xml:
<dependency> <groupId>com.fasterxml.jackson.module</groupId> <artifactId>jackson-module-jaxb-annotations</artifactId> <version>2.6.1</version> </dependency>
自定義ObjectMapper配置(取消注釋所有注釋以在Spring中將此映射器注冊為默認值):
//@Configuration public class JacksonConfig { //@Primary //@Bean public static ObjectMapper createCustomObjectMapper() { ObjectMapper mapper = new ObjectMapper(); AnnotationIntrospector aiJaxb = new JaxbAnnotationIntrospector(TypeFactory.defaultInstance()); AnnotationIntrospector aiJackson = new JacksonAnnotationIntrospector(); // first Jaxb, second Jackson annotations mapper.setAnnotationIntrospector(AnnotationIntrospector.pair(aiJaxb, aiJackson)); return mapper; } }
要顯示為JSON的代碼:
public void displayJSON(Object reqResp) throws JsonProcessingException{ ObjectMapper mapper = JacksonConfig.createCustomObjectMapper(); LOG.info(mapper.writeValueAsString(reqResp)); }
根據Jackson使用JAXB注釋 : 啟用JAXB注釋支持 ,您需要設置mapper.getDeserializationConfig().setAnnotationIntrospector(new JaxbAnnotationIntrospector());
使Jackson能夠使用JAXB注釋。
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