正如StaxMan已经建议的那样，你可以通过编写a
BeanDeserializerModifier并通过进行注册来实现
SimpleModule。下面的示例应该起作用：
public class UserEventDeserializer extends StdDeserializer<User> implements ResolvableDeserializer{ private static final long serialVersionUID = 7923585097068641765L; private final JsonDeserializer<?> defaultDeserializer; public UserEventDeserializer(JsonDeserializer<?> defaultDeserializer) { super(User.class); this.defaultDeserializer = defaultDeserializer; } @Override public User deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException, JsonProcessingException { User deserializedUser = (User) defaultDeserializer.deserialize(jp, ctxt); // Special logic return deserializedUser; } // for some reason you have to implement ResolvableDeserializer when modifying BeanDeserializer // otherwise deserializing throws JsonMappingException?? @Override public void resolve(DeserializationContext ctxt) throws JsonMappingException { ((ResolvableDeserializer) defaultDeserializer).resolve(ctxt); } public static void main(String[] args) throws JsonParseException, JsonMappingException, IOException { SimpleModule module = new SimpleModule(); module.setDeserializerModifier(new BeanDeserializerModifier() { @Override public JsonDeserializer<?> modifyDeserializer(DeserializationConfig config, BeanDescription beanDesc, JsonDeserializer<?> deserializer) { if (beanDesc.getBeanClass() == User.class) return new UserEventDeserializer(deserializer); return deserializer; } }); ObjectMapper mapper = new ObjectMapper(); mapper.registerModule(module); User user = mapper.readValue(new File("test.json"), User.class); }}
