5. Several notifications of Spring AOP (XML)

1. Front, back, back, exception and surround

1  Public InterfaceCalculator {2 3     intAddintAintb);4 5     intSubintAintb);6 }7 8  Public classCalculatorimplImplementsCalculator {9 Ten @Override One      Public intAddintAintb) { A         returnA +b; -     } -  the @Override -      Public intSubintAintb) { -         Try { -             inti = 1/0; +}Catch(Exception e) { -         } +         returnAb; A     } at  -}

1  Public voidbefore (Joinpoint joinpoint) {2System.out.println ("Pre-notification ... ");3String Joinpointname =joinpoint.getsignature (). GetName ();4System.out.println ("Start execution" + Joinpointname + "Method ... Parameters: "+arrays.tostring (Joinpoint.getargs ()));5     }6 7      Public voidAfter (Joinpoint joinpoint) {8System.out.println ("Post-notification ... ");9String Joinpointname =joinpoint.getsignature (). GetName ();TenSystem.out.println (Joinpointname + "method execution complete ... "); One     } A  -      Public voidafterreturning (joinpoint joinpoint, Object result) { -SYSTEM.OUT.PRINTLN ("Return notification ... "); theString Joinpointname =joinpoint.getsignature (). GetName (); -System.out.println (Joinpointname + "method execution complete ... \ n The return value is: "+result); -     } -      +      Public voidafterthrowing (Joinpoint joinpoint, Exception e) { -SYSTEM.OUT.PRINTLN ("Exception notification ... "); +String Joinpointname =joinpoint.getsignature (). GetName (); ASystem.out.println (Joinpointname + "method throws an exception ... \ n Exception information: "+e.getmessage ()); at     } -      -      PublicObject Around (proceedingjoinpoint pjoinpoint) { -SYSTEM.OUT.PRINTLN ("Surround notifications ... "); -String Joinpointname =pjoinpoint.getsignature (). GetName (); -object[] args =Pjoinpoint.getargs (); inSystem.out.println ("Start execution" + Joinpointname + "Method ... Parameters: "+arrays.tostring (args)); -Object result =NULL; to         Try { +result =pjoinpoint.proceed (); - //result = Pjoinpoint.proceed (args); the}Catch(Throwable e) { * e.printstacktrace (); $         }Panax Notoginseng          -System.out.println (Joinpointname + "method execution complete ... "); the          +         returnresult; A}

Configuration:

1 <BeanID= "Calculator"class= "Demo." Calculatorimpl " />2 3     <BeanID= "Calculatorloggingaspect"class= "Demo." Calculatorloggingaspect " />4     5     <Aop:config>6         <Aop:pointcutID= "PointCut"expression= "Execution (* demo.*.add (..))" />7         <Aop:aspectID= "Logging"ref= "Calculatorloggingaspect">8             <!--<aop:before method= "before" pointcut-ref= "Pointcut"/> -9             <!--<aop:after method= "after" pointcut-ref= "Pointcut"/> -Ten             <!--<aop:after-returning method= "afterreturning" returning= "result" pointcut-ref= " pointcut"/> - One             <!--<aop:after-throwing method= "afterthrowing" throwing= "E" pointcut-ref= "Pointcut"/> - A             <Aop:aroundMethod= "Around"Pointcut-ref= "PointCut"/> -         </Aop:aspect> -     </Aop:config>

2. Introduction of notifications

1  Public InterfaceMincalculator {2 3     intMinintAintb);4     5 }6 7  Public classMincalculatorimplImplementsmincalculator{8 9 @OverrideTen      Public intMinintAintb) { One         returnA < b?a:b; A     } -  -}

Configuration:

1 <  types-matching= "demo.*"2                implement-interface= "Demo." Mincalculator "  default-impl=" Demo. Mincalculatorimpl "/>

3. Testing

1 Object obj = Ctx.getbean ("calculator"); 2 Calculator cal = (Calculator) obj; 3 int r = Cal.add (1, 1); 4 System.out.println (r); 5         6 mincalculator min = (mincalculator) obj; 7 r = Min.min (1, 3); 8 System.out.println (R);

5. Several notifications of Spring AOP (XML)