Java Socket NIO Programming

The last time I wrote a socket BASIC programming, but there is a problem, blocking is particularly serious, so small made up to find the NIO study a bit ...

 1  public  class   Timeserver { 2  3  public  static  void   Main (string[] args) { 4  Multipexertimese RVer timersserver=new  multipexertimeserver ("192.168.1.102", 8400); 5  new  Thread (timersserver, "nio-multiplexer" Span style= "color: #000000;" >). Start ();  6   7  8 } 

1  Public classMultipexertimeserverImplementsRunnable {2 3     PrivateSelector Selector;4     5     PrivateServersocketchannel Serversocketchannel;6     7     Private volatile Booleanstop;8     9      PublicMultipexertimeserver (String addr,intPoint ) {Ten         Try { OneSelector=Selector.open (); AServersocketchannel=Serversocketchannel.open (); -Serversocketchannel.socket (). Bind (Newinetsocketaddress (addr, point)); -Serversocketchannel.configureblocking (false); the Serversocketchannel.register (selector, selectionkey.op_accept); -SYSTEM.OUT.PRINTLN ("Socket server:" +serversocketchannel.socket (). Getinetaddress () + ":" +serversocketchannel.socket () . Getlocalport () + ""); -}Catch(Exception e) { - e.printstacktrace (); +System.exit (1); -         } +     } A      at      Public voidStop () { -          This. stop=true; -     } -      - @Override -      Public voidrun () { in          while(!stop) { -             Try { toSelector.select (1000); +Set<selectionkey> selectionkeys=Selector.selectedkeys (); -                 if(Selectionkeys! =NULL&& selectionkeys.size () >0){ theIterator<selectionkey> it=selectionkeys.iterator (); *Selectionkey key=NULL; $                      while(It.hasnext ()) {Panax Notoginsengkey=It.next (); - It.remove (); the                         Try { + handleinput (key); A}Catch(Exception e) { the                             if(key!=NULL){ + Key.cancel (); -                                 if(Key.channel ()! =NULL){ $                                     Try { $ Key.channel (). Close (); -}Catch(Exception E1) { - e1.printstacktrace (); the                                     } -                                 }Wuyi                             } the                         } -                     } Wu                 } -}Catch(Exception e) { About e.printstacktrace (); $             } -         } -         if(selector!=NULL){ -             Try { A selector.close (); +}Catch(Exception e) { the e.printstacktrace (); -             } $         } the     } the  the     Private voidHandleinput (Selectionkey key)throwsioexception{ the         if(Key.isvalid ()) { -             //request to process new Access in             if(Key.isacceptable ()) { theServersocketchannel ssc=(Serversocketchannel) Key.channel (); theSocketchannel sc=ssc.accept (); AboutSc.configureblocking (false); the Sc.register (selector,selectionkey.op_read); theSocketAddress clientaddress =sc.getremoteaddress ();  theSYSTEM.OUT.PRINTLN ("Socket link New client:" +clientaddress);  +             } -             if(Key.isreadable ()) { the                 //reading DataBayiSocketchannel sc=(Socketchannel) Key.channel (); theBytebuffer Readbuffer=bytebuffer.allocate (1024); the                 intreadbytes=Sc.read (readbuffer); -                 if(readbytes>0){ - Readbuffer.flip (); the                     byte[] bytes=New byte[Readbuffer.remaining ()]; the readbuffer.get (bytes); theString body=NewString (Bytes, charset.forname ("GBK")); theSocketAddress clientaddress =sc.getremoteaddress ();  -SYSTEM.OUT.PRINTLN ("Socket link Old client:" +clientaddress);  theSYSTEM.OUT.PRINTLN ("Server receives data:" +body); the                     //and write the data back to the client. theSimpleDateFormat dateformat=NewSimpleDateFormat ("Yyyy-mm-dd HH:mm:ss");94String Time=dateformat.format (NewDate ()); theString res= "from the service side of the response, Time:" +Time ; the Dowrite (sc,res); the}Else if(readbytes<0){98 Key.cancel (); About sc.close (); -}Else{101                     //System.out.println ("The server received 0 bytes of data ...");102                 }103             }104         } the     }106     107     Private voidDowrite (Socketchannel sc,string Res)throwsioexception{108         if(res!=NULL&& Res.trim (). Length () >0){109             byte[] bytes=res.getbytes (); theBytebuffer Bytebuffer=bytebuffer.allocate (1024);111 bytebuffer.put (bytes); the Bytebuffer.flip ();113 Sc.write (bytebuffer); the         } the     } the     

The code doesn't want to explain too much, and it's time to sort out the basic concepts of NIO ...

Java Socket NIO Programming