当你希望在 Map 中不使用 String 为 Key,那么你需要使用 MessagePackKeySerializer
来为 key 进行序列化。
/** * testMessagePackSerializationMapKey */ @Test @JsonSerialize(keyUsing = MessagePackKeySerializer.class) public void testMessagePackSerializationMapKey() { logger.debug("testMessagePackSerializationNotCloseInputStream"); byte[] bytes = new byte[0]; Integer uuid_a = 101; Integer uuid_b = 102; // Instantiate ObjectMapper for MessagePack ObjectMapper objectMapper = new ObjectMapper(new MessagePackFactory()); Map<Integer, MessageData> map = new HashMap<>(); MessageData messageData = new MessageData(); // Element A in MAP messageData.setUuid(UUID.randomUUID().toString()); messageData.setName("CWIKI.US - A"); map.put(uuid_a, messageData); // Element B in MAP messageData = new MessageData(); messageData.setUuid(UUID.randomUUID().toString()); messageData.setName("CWIKI.US - B"); map.put(uuid_b, messageData); try { // Serialize a Java object to byte array bytes = objectMapper.writeValueAsBytes(map); logger.debug("Length of Bytes: [{}]", bytes.length); // Deserialize the byte array to a MAP Map<String, MessageData> deserialized = objectMapper.readValue(bytes, new TypeReference<Map<Integer, MessageData>>() { }); logger.debug("Deserialized MAP Count: [{}]", deserialized.size()); logger.debug("MAP index 0: [{}]", deserialized.get(uuid_a).getName()); assertEquals("CWIKI.US - A", deserialized.get(uuid_a).getName()); } catch (JsonProcessingException ex) { logger.error("Serialize Error", ex); } catch (IOException e) { e.printStackTrace(); } }
https://www.cwiki.us/display/Serialization/MessagePack+Jackson+Dataformat
原文地址:https://www.cnblogs.com/huyuchengus/p/11330476.html
时间: 2024-10-08 10:22:19