MessagePack Java 0.6.X 使用一个消息打包（message-packable）类

使用注解 @Message 来让你可以序列化你自己类中对象的 public 字段。

本代码可以在 https://github.com/cwiki-us-demo/messagepack-6-demo-java/blob/master/src/test/java/com/insight/demo/msgpack/MessagePack6Object.java 中下载到本地后进行编译测试。

package com.insight.demo.msgpack;

import org.junit.Test;
import org.msgpack.MessagePack;
import org.msgpack.annotation.Message;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.UUID;

import static org.junit.Assert.assertEquals;

/**

• MessagePack6Objects
  *
• @author yhu
  */

public class MessagePack6Object {

final Logger logger = LoggerFactory.getLogger(MessagePack6Object.class); /** * MessageData Message Object */ @Message // Annotation public static class MessageData { // public fields are serialized. public String uuid; public String name; public double version; } 

/** * Test MessagePack6Objects */ @Test public void testMessagePack6Objects() { logger.debug("MessagePack6Objects for Objects"); String uuid = UUID.randomUUID().toString(); // INIT OBJ MessageData src = new MessageData(); src.uuid = uuid; src.name = "MessagePack6"; src.version = 0.6; try { MessagePack msgPack = new MessagePack(); // Serialization logger.debug("------ Serialization ------"); byte[] bytes = msgPack.write(src); logger.debug("Bytes Array Length: [{}]", bytes.length); // Deserialization logger.debug("------ Deserialization ------"); MessageData dst = msgPack.read(bytes, MessageData.class); logger.debug("Check Object for UUID: [{}]", dst.uuid); assertEquals(uuid, dst.uuid); } catch (Exception ex) { logger.error("MessagePack Serialization And Deserialization error", ex); } }

}

如果你希望按照顺序序列化多个对象的话，你可以使用  Packer 和  Unpacker 多个对象。

这是因为 MessagePack.write(Object) 和 read(byte[]) 实际上每次都调用创建了 Packer 和 Unpacker 对象。

为了使用 Packer 和  Unpacker 对象，请调用 createPacker(OutputStream) 和  createUnpacker(InputStream)。

本代码可以 https://github.com/cwiki-us-demo/messagepack-6-demo-java/blob/master/src/test/java/com/insight/demo/msgpack/MessagePack6Objects.java 中查看。

package com.insight.demo.msgpack;

import org.junit.Test;
import org.msgpack.MessagePack;
import org.msgpack.annotation.Message;
import org.msgpack.packer.Packer;
import org.msgpack.unpacker.Unpacker;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.util.UUID;

import static org.junit.Assert.assertEquals;

/**

• MessagePack6Objects
  *
• @author yhu
  */

public class MessagePack6Objects {

final Logger logger = LoggerFactory.getLogger(MessagePack6Objects.class); /** * MessageData Message Objects */ @Message // Annotation public static class MessageData { // public fields are serialized. public String uuid; public String name; public double version; } 

/** * Test MessagePack6Objects */ @Test public void testMessagePack6Objects() { logger.debug("MessagePack6Objects for Objects"); String uuid = UUID.randomUUID().toString(); // INIT OBJ MessageData src1 = new MessageData(); src1.uuid = uuid; src1.name = "MessagePack6-src1"; src1.version = 0.6; MessageData src2 = new MessageData(); src2.uuid = uuid; src2.name = "MessagePack6-src2"; src2.version = 10.6; MessageData src3 = new MessageData(); src3.uuid = uuid; src3.name = "MessagePack6-src3"; src3.version = 1.6; try { MessagePack msgPack = new MessagePack(); // Serialization logger.debug("------ Serialization ------"); ByteArrayOutputStream out = new ByteArrayOutputStream(); Packer packer = msgPack.createPacker(out); packer.write(src1); packer.write(src2); packer.write(src3); byte[] bytes = out.toByteArray(); logger.debug("Bytes Array Length: [{}]", bytes.length); // Deserialization logger.debug("------ Deserialization ------"); ByteArrayInputStream in = new ByteArrayInputStream(bytes); Unpacker unpacker = msgPack.createUnpacker(in); MessageData dst1 = unpacker.read(MessageData.class); MessageData dst2 = unpacker.read(MessageData.class); MessageData dst3 = unpacker.read(MessageData.class); logger.debug("Check Object for UUID: [{}]", dst1.uuid); assertEquals(uuid, dst1.uuid); } catch (Exception ex) { logger.error("MessagePack Serialization And Deserialization error", ex); } }

}

https://www.cwiki.us/display/Serialization/QuickStart+For+MessagePack+Java+0.6.X