java原生序列化和Kryo序列化性能实例对比分析_Java教程

简介

最近几年，各种新的高效序列化方式层出不穷，不断刷新序列化性能的上限，最典型的包括：

专门针对Java语言的：Kryo，FST等等

跨语言的：Protostuff，ProtoBuf，Thrift，Avro，MsgPack等等

这些序列化方式的性能多数都显著优于hessian2（甚至包括尚未成熟的dubbo序列化）。有鉴于此，我们为dubbo引入Kryo和FST这两种高效Java序列化实现，来逐步取代hessian2。其中，Kryo是一种非常成熟的序列化实现，已经在Twitter、Groupon、 Yahoo以及多个著名开源项目（如Hive、Storm）中广泛的使用。而FST是一种较新的序列化实现，目前还缺乏足够多的成熟使用案例，但它还是非常有前途的，下面我们比较下，java原生序列化Kryo序列化性能比较

1、实体类 Simple.java

									package bhz.entity;

									import java.io.Serializable;

									import java.util.Map;

									public class Simple implements Serializable

									{ 

									   private static final long serialVersionUID = -4914434736682797743L; 

									   private String name; 

									   private int age; 

									   private Map<String,Integer> map; 

									   public Simple(){ 

									   } 

									   public Simple(String name,int age,Map<String,Integer> map){ 

									     this.name = name; 

									     this.age = age; 

									     this.map = map; 

									   } 

									   public String getName() { 

									    return name; 

									   } 

									   public void setName(String name) { 

									    this.name = name; 

									   } 

									   public int getAge() { 

									    return age; 

									   } 

									   public void setAge(int age) { 

									    this.age = age; 

									   } 

									   public Map<String, Integer> getMap() { 

									    return map; 

									   } 

									   public void setMap(Map<String, Integer> map) { 

									    this.map = map; 

									   } 

									}

2、java原生序列化 OriginalSerializable.java

									package bhz.test;

									import java.io.FileInputStream;

									import java.io.FileNotFoundException;

									import java.io.FileOutputStream;

									import java.io.IOException;

									import java.io.ObjectInputStream;

									import java.io.ObjectOutputStream;

									import java.util.HashMap;

									import java.util.Map;

									import bhz.entity.Simple;

									public class OriginalSerializable { 

									  public static void main(String[] args) throws IOException, ClassNotFoundException { 

									    long start = System.currentTimeMillis(); 

									    setSerializableObject(); 

									    System.out.println("java原生序列化时间:" + (System.currentTimeMillis() - start) + " ms" );  

									    start = System.currentTimeMillis(); 

									    getSerializableObject(); 

									    System.out.println("java原生反序列化时间:" + (System.currentTimeMillis() - start) + " ms"); 

									  } 

									  public static void setSerializableObject() throws IOException{ 

									    FileOutputStream fo = new FileOutputStream("D:/file2.bin"); 

									    ObjectOutputStream so = new ObjectOutputStream(fo); 

									    for (int i = 0; i < 100000; i++) { 

									      Map<String,Integer> map = new HashMap<String, Integer>(2); 

									      map.put("zhang0", i); 

									      map.put("zhang1", i); 

									      so.writeObject(new Simple("zhang"+i,(i+1),map)); 

									    } 

									    so.flush(); 

									    so.close(); 

									  } 

									  public static void getSerializableObject(){ 

									     FileInputStream fi; 

									    try { 

									      fi = new FileInputStream("D:/file2.bin"); 

									      ObjectInputStream si = new ObjectInputStream(fi); 

									      Simple simple =null; 

									      while((simple=(Simple)si.readObject()) != null){ 

									        //System.out.println(simple.getAge() + " " + simple.getName()); 

									      } 

									      fi.close(); 

									      si.close(); 

									    } catch (FileNotFoundException e) { 

									      e.printStackTrace(); 

									    } catch (IOException e) { 

									      //e.printStackTrace(); 

									    } catch (ClassNotFoundException e) { 

									      e.printStackTrace(); 

									    } 

									  } 

									}

3、kyro序列化 KyroSerializable.java

									package bhz.test;

									import java.io.FileInputStream;

									import java.io.FileNotFoundException;

									import java.io.FileOutputStream;

									import java.io.IOException;

									import java.util.HashMap;

									import java.util.Map;

									import org.objenesis.strategy.StdInstantiatorStrategy;

									import bhz.entity.Simple;

									import com.esotericsoftware.kryo.Kryo;

									import com.esotericsoftware.kryo.KryoException;

									import com.esotericsoftware.kryo.io.Input;

									import com.esotericsoftware.kryo.io.Output;

									public class KyroSerializable { 

									  public static void main(String[] args) throws IOException { 

									    long start = System.currentTimeMillis(); 

									    setSerializableObject(); 

									    System.out.println("Kryo 序列化时间:" + (System.currentTimeMillis() - start) + " ms" ); 

									    start = System.currentTimeMillis(); 

									    getSerializableObject(); 

									    System.out.println("Kryo 反序列化时间:" + (System.currentTimeMillis() - start) + " ms"); 

									  } 

									  public static void setSerializableObject() throws FileNotFoundException{ 

									    Kryo kryo = new Kryo(); 

									    kryo.setReferences(false); 

									    kryo.setRegistrationRequired(false); 

									    kryo.setInstantiatorStrategy(new StdInstantiatorStrategy()); 

									    kryo.register(Simple.class); 

									    Output output = new Output(new FileOutputStream("D:/file1.bin")); 

									    for (int i = 0; i < 100000; i++) { 

									      Map<String,Integer> map = new HashMap<String, Integer>(2); 

									      map.put("zhang0", i); 

									      map.put("zhang1", i); 

									      kryo.writeObject(output, new Simple("zhang"+i,(i+1),map)); 

									    } 

									    output.flush(); 

									    output.close(); 

									  } 

									  public static void getSerializableObject(){ 

									    Kryo kryo = new Kryo(); 

									    kryo.setReferences(false); 

									    kryo.setRegistrationRequired(false); 

									    kryo.setInstantiatorStrategy(new StdInstantiatorStrategy()); 

									    Input input; 

									    try { 

									      input = new Input(new FileInputStream("D:/file1.bin")); 

									      Simple simple =null; 

									      while((simple=kryo.readObject(input, Simple.class)) != null){ 

									        //System.out.println(simple.getAge() + " " + simple.getName() + " " + simple.getMap().toString()); 

									      } 

									      input.close(); 

									    } catch (FileNotFoundException e) { 

									      e.printStackTrace(); 

									    } catch(KryoException e){ 

									    } 

									  } 

									}