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