我最近將我的Spring版本從3.1.2升級到3.2.0。我發現像wrap wrap元素這樣的JSON屬性,防止在ObjectMapper中定義的null值不再工作。Spring MVC 3.2和JSON ObjectMapper問題
這裏是代碼片段
<mvc:annotation-driven content-negotiation-manager="contentNegotiationManager" />
<bean id="contentNegotiationManager" class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean">
<property name="favorPathExtension" value="true" />
<property name="ignoreAcceptHeader" value="false" />
<property name="mediaTypes" >
<value>
json=application/json
xml=application/xml
</value>
</property>
</bean>
和JSON轉換器
<bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
<property name="objectMapper" ref="customJacksonObjectMapper"/>
<property name="supportedMediaTypes" value="application/json"/>
</bean>
對象映射器代碼
public class CustomJacksonObjectMapper extends ObjectMapper {
@SuppressWarnings("deprecation")
public CustomJacksonObjectMapper() {
super();
final AnnotationIntrospector introspector = new JaxbAnnotationIntrospector();
this.configure(org.codehaus.jackson.map.DeserializationConfig.Feature.UNWRAP_ROOT_VALUE, true);
this.configure(org.codehaus.jackson.map.SerializationConfig.Feature.WRAP_ROOT_VALUE, true);
this.configure(org.codehaus.jackson.map.SerializationConfig.Feature.WRITE_NULL_PROPERTIES, false);
this.setDeserializationConfig(this.getDeserializationConfig().withAnnotationIntrospector(introspector));
this.setSerializationConfig(this.getSerializationConfig().withAnnotationIntrospector(introspector));
}
}
傑克遜版本
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-xc</artifactId>
<version>1.9.7</version>
</dependency>
可能是什麼問題?任何指針讚賞。
你確定使用了'CustomJacksonObjectMapper'嗎? – axtavt