【序列化工具JdkSerialize和Protostuff】

Dear 丶 2023-10-14 10:12 4阅读 0赞

> **序列化工具对比**

*  **JdkSerialize**：java内置的序列化能将实现了Serilazable接口的对象进行序列化和反序列化， ObjectOutputStream的writeObject()方法可序列化对象生成字节数组
 *  **Protostuff**：google开源的protostuff采用更为紧凑的二进制数组，表现更加优异，然后使用protostuff的编译工具生成pojo类

### JdkSerializeUtil ###

import java.io.ByteArrayInputStream;
    import java.io.ByteArrayOutputStream;
    import java.io.ObjectInputStream;
    import java.io.ObjectOutputStream;
    
    /**
     * jdk序列化
     */
    public class JdkSerializeUtil {
    
        /**
         * 序列化
         * @param obj
         * @param <T>
         * @return
         */
        public static <T> byte[] serialize(T obj) {
    
            if (obj  == null){
                throw new NullPointerException();
            }
    
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            try {
                ObjectOutputStream oos = new ObjectOutputStream(bos);
    
                oos.writeObject(obj);
                return bos.toByteArray();
            } catch (Exception ex) {
                ex.printStackTrace();
            }
            return new byte[0];
        }
    
        /**
         * 反序列化
         * @param data
         * @param clazz
         * @param <T>
         * @return
         */
        public static <T> T deserialize(byte[] data, Class<T> clazz) {
            ByteArrayInputStream bis = new ByteArrayInputStream(data);
    
            try {
                ObjectInputStream ois = new ObjectInputStream(bis);
                T obj = (T)ois.readObject();
                return obj;
            } catch (Exception ex) {
                ex.printStackTrace();
            }
    
            return  null;
        }
    
    
    
    }

### ProtostuffUtil （优选） ###

import com.heima.model.wemedia.pojos.WmNews;
    import io.protostuff.LinkedBuffer;
    import io.protostuff.ProtostuffIOUtil;
    import io.protostuff.Schema;
    import io.protostuff.runtime.RuntimeSchema;
    
    public class ProtostuffUtil {
    
        /**
         * 序列化
         * @param t
         * @param <T>
         * @return
         */
        public static <T> byte[] serialize(T t){
            Schema schema = RuntimeSchema.getSchema(t.getClass());
            return ProtostuffIOUtil.toByteArray(t,schema,
                    LinkedBuffer.allocate(LinkedBuffer.DEFAULT_BUFFER_SIZE));
     
        }
    
        /**
         * 反序列化
         * @param bytes
         * @param c
         * @param <T>
         * @return
         */
        public static <T> T deserialize(byte []bytes,Class<T> c) {
            T t = null;
            try {
                t = c.newInstance();
                Schema schema = RuntimeSchema.getSchema(t.getClass());
                 ProtostuffIOUtil.mergeFrom(bytes,t,schema);
            } catch (InstantiationException e) {
                e.printStackTrace();
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            }
            return t;
        }
    
    
     
    }

Protostuff需要引导依赖：

<dependency>
        <groupId>io.protostuff</groupId>
        <artifactId>protostuff-core</artifactId>
        <version>1.6.0</version>
    </dependency>
    
    <dependency>
        <groupId>io.protostuff</groupId>
        <artifactId>protostuff-runtime</artifactId>
        <version>1.6.0</version>
    </dependency>

### 测试 ###

/**
         * jdk序列化与protostuff序列化对比
         * @param args
         */
        public static void main(String[] args) {
            long start =System.currentTimeMillis();
            for (int i = 0; i <1000000 ; i++) {
                WmNews wmNews =new WmNews();  //自己测试创建的对象
                JdkSerializeUtil.serialize(wmNews);
            }
            System.out.println(" jdk 花费 "+(System.currentTimeMillis()-start));
    
            start =System.currentTimeMillis();
            for (int i = 0; i <1000000 ; i++) {
                WmNews wmNews =new WmNews();
                ProtostuffUtil.serialize(wmNews);
            }
            System.out.println(" protostuff 花费 "+(System.currentTimeMillis()-start));
        }

**结果：**

![776c6a915506441f976c9d11177bc6b2.png][]

[776c6a915506441f976c9d11177bc6b2.png]: https://img-blog.csdnimg.cn/776c6a915506441f976c9d11177bc6b2.png