MessagePack使用研究
MessagePack是一个基于二进制高效的对象序列化类库，可用于跨语言通信。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++等众多语言。比GoogleProtocol Buffers还要快4倍。
代码实现1：
package com.newtest;
import java.io.IOException;
import org.msgpack.MessagePack;
import org.msgpack.annotation.Message;
@Message
public class Student {
public int sAge = 0;
public String sName;
public boolean sHasPhone;
public static void main(String[] args) throws IOException {
Student stu = new Student();
stu.sAge = 13;
stu.sName = "programer";
stu.sHasPhone = true;
MessagePack pack = new MessagePack();
// 序列化
byte[] bytes = pack.write(stu);
// 反序列化
Student s = pack.read(bytes, Student.class);
System.out.println("Name: " + s.sName + "\n" + "Age: " + s.sAge + "\n"
+ "HasPhone: " + s.sHasPhone);
}
}
代码实现2：
package com.newtest;
import java.io.IOException;
import org.msgpack.MessagePack;
import org.msgpack.annotation.Message;
import org.msgpack.annotation.Optional;
@Message
public class ServerStudent {
public int sAge = 0;
public String sName;
public boolean sHasPhone;
/**
* 在Server端相应的Entity里添加需要的属性， 但是为了兼容之前的数据，必须加上注解@Optional
* Optional的作用是是否有该字段都不会影响MessagePack的正常解压
*/
@Optional
public double sHeight;
/**
* 该类里并没有sHeight字段，可以把它看做已经发出去的产品
*/
@Message
static class ClientStudent {
public int sAge = 0;
public String sName;
public boolean sHasPhone;
}
/**
* 与目前Server端数据字段相一致的Entity
*/
@Message
static class NewClientStudent {
public int sAge = 0;
public String sName;
public boolean sHasPhone;
public double sHeight;
}
public static void main(String[] args) throws IOException {
ClientStudent stu = new ClientStudent();
stu.sAge = 13;
stu.sName = "programer";
stu.sHasPhone = true;
NewClientStudent ns = new NewClientStudent();
ns.sAge = 10;
ns.sName = "coder";
ns.sHasPhone = false;
ns.sHeight = 180;
MessagePack pack = new MessagePack();
// 序列化
byte[] bytes = pack.write(stu);
byte[] nBytes = pack.write(ns);
// 反序列化
ServerStudent s = pack.read(bytes, ServerStudent.class);
ServerStudent ss = pack.read(nBytes, ServerStudent.class);
System.out.println("之前发布出去的产品： \n" + "Name: " + s.sName + "\n"
+ "Age: " + s.sAge + "\n" + "HasPhone: " + s.sHasPhone+"\n\n");
System.out.println("目前的产品： \n" + "Name: " + ss.sName + "\n" + "Age: "
+ ss.sAge + "\n" + "HasPhone: " + ss.sHasPhone + "\n"
+ "Height: " + ss.sHeight);
}
}
需要进入的JARS:见附件
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