性能最好的序列化反序列化，Protobuf的用法（maven项目）

首先要在pom.xml里添加Protobuf的jar包

<dependency>  
     <groupId>com.dyuproject.protostuff</groupId>  
     <artifactId>protostuff-core</artifactId>  
     <version>1.0.8</version>  
 </dependency>  
  
 <dependency>  
     <groupId>com.dyuproject.protostuff</groupId>  
     <artifactId>protostuff-runtime</artifactId>  
     <version>1.0.8</version>  
 </dependency>  

序列化的实体类User.Java（不需要实现Serializable接口）

package com.serialize.entity;  
  
public class User {  
    private String id;  
    private String username;  
    private String password;  
      
    public User() {  
    }  
    public User(String id, String username, String password) {  
        this.id = id;  
        this.username = username;  
        this.password = password;  
    }  
    public String getId() {  
        return id;  
    }  
    public void setId(String id) {  
        this.id = id;  
    }  
    public String getUsername() {  
        return username;  
    }  
    public void setUsername(String username) {  
        this.username = username;  
    }  
    public String getPassword() {  
        return password;  
    }  
    public void setPassword(String password) {  
        this.password = password;  
    }  
    @Override  
    public String toString() {  
        return "User [id=" + id + ", username=" + username + ", password="  
                + password + "]";  
    }  
      
  
}  

序列化的工具类SerializeUtils.java（使用了泛型方法）

package com.serialize.utils;  
  
import com.dyuproject.protostuff.LinkedBuffer;  
import com.dyuproject.protostuff.ProtobufIOUtil;  
import com.dyuproject.protostuff.runtime.RuntimeSchema;  
  
public class SerializeUtils{  
    public static <T> byte[] serialize(T t,Class<T> clazz) {  
        return ProtobufIOUtil.toByteArray(t, RuntimeSchema.createFrom(clazz),  
                LinkedBuffer.allocate(LinkedBuffer.DEFAULT_BUFFER_SIZE));  
    }  
    public static <T> T deSerialize(byte[] data,Class<T> clazz) {  
        RuntimeSchema<T> runtimeSchema = RuntimeSchema.createFrom(clazz);  
        T t = runtimeSchema.newMessage();  
        ProtobufIOUtil.mergeFrom(data, t, runtimeSchema);  
        return t;  
    }  
}  

测试主类App.java

package com.serialize;  
  
import com.serialize.entity.User;  
import com.serialize.utils.SerializeUtils;  
  
public class App {  
    public static void main(String[] args) {      
        User user=new User("1","xiaobao","123456");  
        System.out.println("序列化");  
        byte[] data = SerializeUtils.serialize(user,User.class);  
        for (byte b : data) {  
            System.out.print(b);  
        }  
        System.out.println();  
        System.out.println("反序列化");  
        User user2 = SerializeUtils.deSerialize(data,User.class);  
        System.out.println(user2);  
    }  
}