Java Dynamic Agent Insert Log

interface of the object being proxied

1  Public Interface Iscoreservice {2      Public void Addscore (String s,string s1); 3 }

Implementation of the object being proxied

1  Public classScoreserviceimplImplementsiscoreservice{2     intScore = 0;3      PublicList<integer> sList =NewArraylist<integer>();4     5      Public voidAddscore (String s,string s1) {6System.out.println (score+=3);7 Slist.add (score);8     }9}

proxy class

1  Public classLoghandlerImplementsInvocationhandler {2     3     PrivateObject TargetObject;4     5      PublicObject Createproxy (Object targetObject) {6          This. TargetObject =TargetObject;7         returnproxy.newproxyinstance (Targetobject.getclass (). getClassLoader (),8 Targetobject.getclass (). Getinterfaces (),9                  This);Ten     } One  A      PublicObject Invoke (Object proxy, Method method, object[] args)throwsThrowable { -          -Object obj =NULL; the         Try { - Beforelog (); -obj =Method.invoke (TargetObject, args); - Afterlog (); +}Catch(Exception e) { - e.printstacktrace (); +         } A          at          -         returnobj; -     } -      -     Private voidBeforelog () { -System.out.println ("called Before"); in     } -      to     Private voidAfterlog () { +System.out.println ("Call after"); -     } the  *}

Test class

1  Public class testhandler{2      Public Static void main (String [] args) {3          Iscoreservice Servcie = (iscoreservice) loghandler.createproxy (new  Scoreserviceimpl ()); 4          Servcie.addscore ("," "");       5     }6 }

Java Dynamic Agent Insert Log