使用Kryo

Kryo Serializer

GitHub

标签： Kryo Serialization

使用Kryo简单例子

下面我们使用Kryo来将一个class（ImmutableBytesWritable）的 instance 转换成字节流写入外部文件，然后再从文件中读取里面的字节内容，并将其反序列化为该class的另一个instance。

def main(args: Array[String]): Unit = {

        val obj = new ImmutableBytesWritable(Bytes.toBytes("Test ImmutableBytesWritable"))

        serialize(obj, "a.dat")
        deserialize("a.dat")

}

def serialize(obj: ImmutableBytesWritable, path:String): Unit = {
        val kryo = new Kryo()
        val output = new Output(new FileOutputStream(path))
        kryo.writeObject(output, obj)
        output.close
}


def deserialize(path: String): Unit = {
        val kryo = new Kryo()
        val input = new Input(new FileInputStream(path))
        val obj = kryo.readObject(input, classOf[ImmutableBytesWritable])
            .asInstanceOf[ImmutableBytesWritable]

        println(Bytes.toStringBinary(obj.get))
        input.close
    }

输出：

Test ImmutableBytesWritable