快速序列化Java开源库，Fast-serialization 2.18 发布

jopen 10年前

FST fast-serialization重新实现的Java序列化，注重速度，大小和兼容性。使用FST代替原有功能，只需要修复很少的代码。

项目地址：http://ruedigermoeller.github.io/fast-serialization/

特性:

  • Faster serialization and smaller object size.
  • drop-in replacement. Does not require special getters/setters/Constructors/Interfaces to serialize a class. Extends Outputstream, implements ObjectInput/ObjectOutput. Few code changes required.
  • Full support of JDK-serialization features such as Externalizable writeObject/readObject/readReplace/validation/putField/getField, hooks etc.. If an object is serializable with JDK, it should be serializable with FST without any further work.
  • preserves links inside the serialized object graph same as JDK default serialization
  • custom optimization using annotations, custom serializers
  • supports versioning (2.x only)
  • conditional decoding (skip decoding parts of an object/stream in case)

支持 java 1.7+ (fst 1.62: JDK 1.6)

  • fst 1.x is jdk 1.6 compatible (no use of 1.7 features). I backport 2.x fixes from time to time or upon request
  • FST-structs does require 1.7 API

示例：

// ! reuse this Object, it caches metadata. Performance degrades massively  // if you create a new Configuration Object with each serialization !  static FSTConfiguration conf = FSTConfiguration.createDefaultConfiguration();  ...  public MyClass myreadMethod(InputStream stream) throws IOException, ClassNotFoundException  {      FSTObjectInput in = conf.getObjectInput(stream);      MyClass result = in.readObject(MyClass.class);      // DON'T: in.close(); here prevents reuse and will result in an exception            stream.close();      return result;  }     public void mywriteMethod( OutputStream stream, MyClass toWrite ) throws IOException   {      FSTObjectOutput out = conf.getObjectOutput(stream);      out.writeObject( toWrite, MyClass.class );      // DON'T out.close() when using factory method;      out.flush();      stream.close();  }

FST 2.18 发布了，从 2.17 版本开始 FST 的许可证由原来的 LGPL 改为 Apache。

与 2.16 版本比较，其他改进包括：

  • Wavesonics contributed an android port (only plain serialization tested). Merged this to keep a single branch. For android a different object instantiation strategy is used. Adds a dependency to objenesis-2.1

  • fixed 2.x structs (for fast-cast 3.0). Had some issues because of low test coverage. Writing unit tests for structs still open.

Bug 修复：

  • changes done from 1.x to 2.x introduced an unnecessary perf degradation when reading from byte[]. Affects small objects most. fixed.

  • kson supports thousand separator in numbers '_'

  • fixed stackoverflow on some android devices with smallish stack sizes

  • fixed a buffer overflow reading externalizables when using fastBinaryConfiguration