MessagePack Java Jackson Dataformat - Map 的序列化和反序列化

本测试方法，可以在 https://github.com/cwiki-us-demo/serialize-deserialize-demo-java/blob/master/src/test/java/com/insight/demo/serialize/MessagePackSerializer.java 中找到。

我们需要定义测试需要的 MAP，定义 Map 的方法你可以在下面的测试程序中找到。

/** * SerializationMap */ @Test public void testMessagePackSerializationMap() { byte[] bytes = new byte[0]; String uuid_a = UUID.randomUUID().toString(); String uuid_b = UUID.randomUUID().toString(); // Instantiate ObjectMapper for MessagePack ObjectMapper objectMapper = new ObjectMapper(new MessagePackFactory()); Map<String, 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<String, 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