我正在使用Spring MVC 3.0.5和Jackson 1.7.2。我希望实现一个动态Bean序列化器分配机制,例如,假设我的MVC控制器返回(
然而,我想让我的自定义序列化器仅在某些标志处于活动状态时触发(例如,附加到ThreadLocal的布尔变量)。否则,我想使用Jackson提供的序列化器,保持
有没有办法实现这种方法?
我已经将自己的ObjectMapper、SerializerFactory和CustomSerializers注册到Spring的
@ResponseBody
)类型为MyObject的对象。默认情况下,Jackson的SerializerFactory会查找最合适的序列化器,包括我的自定义序列化器(例如CustomSerializer extends JsonSerializer<MyObject>
)。然而,我想让我的自定义序列化器仅在某些标志处于活动状态时触发(例如,附加到ThreadLocal的布尔变量)。否则,我想使用Jackson提供的序列化器,保持
MappingJacksonHttpMessageConverter
的默认行为不变。有没有办法实现这种方法?
我已经将自己的ObjectMapper、SerializerFactory和CustomSerializers注册到Spring的
<mvc:annotaion-driven />
默认的MappingJacksonHttpMessageConverter
中。public class ConvertingPostProcessor implements BeanPostProcessor {
private ObjectMapper jacksonJsonObjectMapper;
public Object postProcessBeforeInitialization(Object bean, String name)
throws BeansException {
if (bean instanceof AnnotationMethodHandlerAdapter) {
HttpMessageConverter<?>[] convs = ((AnnotationMethodHandlerAdapter) bean).getMessageConverters();
for (HttpMessageConverter<?> conv: convs) {
if (conv instanceof MappingJacksonHttpMessageConverter) {
((MappingJacksonHttpMessageConverter) conv).setObjectMapper(jacksonJsonObjectMapper);
}
}
}
return bean;
}
public Object postProcessAfterInitialization(Object bean, String name)
throws BeansException {
return bean;
}
public void setJacksonJsonObjectMapper(ObjectMapper jacksonJsonObjectMapper) {
this.jacksonJsonObjectMapper = jacksonJsonObjectMapper;
}
}
spring-mvc.xml应该是这样的:
<mvc:annotation-driven />
...
<bean id="jacksonJsonObjectMapper" class="org.mycode.serialize.CustomObjectMapper">
<property name="customSerializerFactory" ref="jacksonJsonCustomSerializerFactory" />
</bean>
<bean id="jacksonJsonCustomSerializerFactory" class="org.mycode.serialize.CustomSerializerFactoryRegistry">
<property name="serializers">
<map>
<entry key="org.mycode.domain.MyObject" value-ref="customSerializer" />
</map>
</property>
</bean>
<bean id="customSerializer" class="org.mycode.serialize.CustomSerializer">
<property name="jacksonJsonCustomSerializerFactory" ref="jacksonJsonCustomSerializerFactory" />
</bean>
<bean id="convertingPostProcessor" class="org.mycode.serialize.ConvertingPostProcessor">
<property name="jacksonJsonObjectMapper" ref="jacksonJsonObjectMapper" />
</bean>
Thanks in advance!!