msgpack

msgpack简介
MessagePack是一个基于二进制高效的对象序列化Library用于跨语言通信。
它可以像JSON那样，在许多种语言之间交换结构对象；但是它比JSON更快速也更轻巧。
支持Python、Ruby、Java、C/C++、Javascript等众多语言。
比Google Protocol Buffers还要快4倍

1. 下载 msgpack-0.5.1-devel.jar
    建议从Maven仓库下 可能依赖的 jar
    slf4j-api-1.4.3.jar
    slf4j-log4j12-1.4.3.jar
    log4j-1.2.13.jar
    javassist-3.12.1.GA.jar

2.  对JavaBean操作

package com.mytest;

/**
 * 
 * 功能描述：
 * 
 * @author lw
 * @created 2011-6-9 下午01:55:29
 * @version 1.0.0
 * @date 2011-6-9 下午01:55:29
 */

import java.io.Serializable;

import org.msgpack.annotation.MessagePackMessage;

@MessagePackMessage  
// Annotation
public class BeanClass implements Serializable{
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	
	// public fields are serialized.
	public String str;
	public double num;
	public String info;
}

package com.mytest;

/**
 * 
 * 功能描述：
 * 
 * @author lw
 * @created 2011-6-9 下午01:55:29
 * @version 1.0.0
 * @date 2011-6-9 下午01:55:29
 */
import java.util.HashMap;

import org.msgpack.MessagePack;

public class BeanMain {

	public static void main(String[] args) {
		BeanClass src = new BeanClass();
		src.str = "msgpack";
		src.num = 0.5;
		src.info = "This is msgpack";
		HashMap<String, String> map = new HashMap<String, String>();
		map.put("src", "src----");

		// Serialize
		byte[] raw = MessagePack.pack(src);

		// Deserialize
		BeanClass dst = MessagePack.unpack(raw, BeanClass.class);
		System.out.println(dst.str + ":" + dst.num);
	}
}

3.  对Map，List操作

package com.mytest;

import static org.msgpack.Templates.TAny;
import static org.msgpack.Templates.TString;
import static org.msgpack.Templates.tList;
import static org.msgpack.Templates.tMap;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.msgpack.MessagePack;
import org.msgpack.Template;
import org.msgpack.object.ArrayType;
import org.msgpack.object.BooleanType;
import org.msgpack.object.FloatType;
import org.msgpack.object.IntegerType;
import org.msgpack.object.RawType;

/**
 * 
 * 功能描述：
 * 
 * @author lw
 * @created 2011-6-13 上午09:33:11
 * @version 1.0.0
 * @date 2011-6-13 上午09:33:11
 */

public class RawTypeUtil {
	
	/**
	 * 
	 * Object
	 *
	 * @param arg0
	 * @return
	 */
	public static Object unpackToObject(byte[] arg0) {
		return unpackToObject(arg0, TAny);
	}
	
	/**
	 * 
	 * Object
	 *
	 * @param arg0
	 * @param arg1
	 * @return
	 */
	public static Object unpackToObject(byte[] arg0, Template arg1) {
		Object obj = (Object) MessagePack.unpack(arg0, arg1);
		return rawObjToObj(obj);
	}
	
	/**
	 * 
	 * Map
	 *
	 * @param arg0
	 * @return
	 */
	public static Map<String, Object> unpackToMap(byte[] arg0) {
		return unpackToMap(arg0, tMap(TString, TAny));
	}
	
	/**
	 * 
	 * Map
	 *
	 * @param arg0
	 * @param arg1
	 * @return
	 */
	public static Map<String, Object> unpackToMap(byte[] arg0, Template arg1) {
		@SuppressWarnings("unchecked")
		Map<String, Object> dst = (Map<String, Object>) MessagePack.unpack(arg0, arg1);
		return rawtypeMapConvert(dst);
	}
	
	/**
	 * 
	 * List
	 *
	 * @param arg0
	 * @return
	 */
	public static List<Map<String, Object>> unpackToList(byte[] arg0) {
		return unpackToList(arg0, tList(tMap(TString, TAny)));
	}
	
	/**
	 * 
	 * List
	 *
	 * @param arg0
	 * @param arg1
	 * @return
	 */
	public static List<Map<String, Object>> unpackToList(byte[] arg0, Template arg1) {
		@SuppressWarnings("unchecked")
		List<Map<String, Object>> dst = (List<Map<String, Object>>) MessagePack.unpack(arg0, arg1);
		return rawtypeListConvert(dst);
	}
	
	private static List<Map<String, Object>> rawtypeListConvert(final List<Map<String, Object>> list) {
		List<Map<String,Object>> rList = new ArrayList<Map<String,Object>>();
		Map<String, Object> map = new HashMap<String, Object>();
		for(Map<String, Object> s : list) {
			map = rawtypeMapConvert(s);
			rList.add(map);
		}
		return rList;
	}
	
	private static Map<String, Object> rawtypeMapConvert (
			final Map<String, Object> params) {
		Map<String, Object> rParams = new HashMap<String, Object>(0);
		Iterator<String> iterator = params.keySet().iterator();
		while (iterator.hasNext()) {
			String key = (String) iterator.next();
			Object objResu = rawObjToObj(params.get(key));
			rParams.put(key, objResu);
		}
		return rParams;
	}

	private static Object rawObjToObj(Object obj) {
		Object objResu = null;
		if (obj instanceof IntegerType) {
			objResu = ((IntegerType) obj).asInt();
		} else if (obj instanceof ArrayType) {
			objResu = ((ArrayType) obj).asArray();
		} else if (obj instanceof BooleanType) {
			objResu = ((BooleanType) obj).asBoolean();
		} else if (obj instanceof FloatType) {
			objResu = ((FloatType) obj).asFloat();
		} else {
			objResu = ((RawType) obj).asString();
		}
		return objResu;
	}
}

package com.mytest;

import java.util.HashMap;
import java.util.Map;

import org.msgpack.MessagePack;

/**
 * 
 * 功能描述：
 * 
 * @author lw
 * @created 2011-6-13 上午09:12:07
 * @version 1.0.0
 * @date 2011-6-13 上午09:12:07
 */

public class MapMain {
	public static void main(String[] args) {
		Map<String, Object> map = new HashMap<String, Object>();
		map.put("t", "aa1");
		map.put("f", 111);

		byte[] raw = MessagePack.pack(map);

		map = RawTypeUtil.unpackToMap(raw);
		System.out.println(map.get("t").toString() + " : "
				+ map.get("f").toString());
	}
}

package com.mytest;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.msgpack.MessagePack;

/**
 * 
 * 
 * 功能描述：
 * 
 * @author lw
 * @created 2011-6-13 上午09:12:30
 * @version 1.0.0
 * @date 2011-6-13 上午09:12:30
 */
public class ListMain {

	public static void main(String[] args) {
		List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
		Map<String, Object> map1 = new HashMap<String, Object>();
		map1.put("t", "aa1");
		map1.put("f", 111);
		Map<String, Object> map2 = new HashMap<String, Object>();
		map2.put("t", "aa2");
		map2.put("f", 333);
		list.add(map1);
		list.add(map2);

		byte[] raw = MessagePack.pack(list);
		List<Map<String, Object>> rList = new ArrayList<Map<String, Object>>();
		rList = RawTypeUtil.unpackToList(raw);
		for (Map<String, Object> s : rList) {
			System.out.println(s.get("t") + " : " + s.get("f"));
		}
	}
}