【序列化工具JdkSerialize和Protostuff】

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：