在Java中通过UDP发送C++结构

你可以使用 Google protocol buffers 作为一种独立于语言的方法来序列化传输和接收的结构。Java和C++都是现成的,Jon Skeet编写了一个产品准备的C语言实现。

我看到了一些在Android上使用的Protobuf示例,包括 this .

另一种可能更简单的方法来自javolution.struct: http://javolution.org/target/site/apidocs/javolution/io/Struct.html

 public static class Student extends Struct {
     public final Enum32<Gender>       gender = new Enum32<Gender>(Gender.values());
     public final UTF8String           name   = new UTF8String(64);
     public final Date                 birth  = inner(new Date());
     public final Float32[]            grades = array(new Float32[10]);
     public final Reference32<Student> next   =  new Reference32<Student>();
 }
class UDPMessage extends Struct {
      Student student = inner(new Student());
      ...
 }
 ...
 public void run() {
     byte[] bytes = new byte[1024];
     DatagramPacket packet = new DatagramPacket(bytes, bytes.length);
     UDPMessage message = new UDPMessage();
     message.setByteBuffer(ByteBuffer.wrap(bytes), 0);
     // packet and message are now two different views of the same data.
     while (isListening) {
         multicastSocket.receive(packet);
         int xxx = message.xxx.get();
         ... // Process message fields directly.
     }
 }

相当难看的代码,但仍然比直接处理JNI缓冲区或已经提到的Google协议缓冲区更漂亮。