Springboot Unified exception handling for controller layer methods

Controller layer method for uniform exception handling

Available in two different scenarios, as follows:

1. Scenario 1: Use @ @ControllerAdvice (or @restcontrolleradvice), @ExceptionHandler annotation implementation;
2. Scenario 2: implementation using AOP technology;

Now, respectively, introduce

Scenario 1: Use @controlleradvice and @ExceptionHandler @controlleradvice or @RestControllerAdvice @ControllerAdviceAnnotations to enhance all @RequestMappingmethod of marking;

Official explanation:
It is typically used to define @ExceptionHandler , @InitBinder and methods that apply to all @ModelAttribute @RequestMapping methods.

@ExceptionHandler

• Only methods can be declared;
• @ControllerAdvicecombined with, can be used to enhance @RequestMapping the exception handling of all methods;

Core code

For complete code, please refer to: Springboot uniform exception handling for controller layer methods

@RestControllerAdvice Public classControllerexceptionhandleadvice {Private Final StaticLogger Logger = Loggerfactory.getlogger (controllerexceptionhandleadvice.class); @ExceptionHandler Publicresultentity Handler (httpservletrequest req, httpservletresponse Res, Exception e) {logger.info ("Restful HTTP request has an exception ..."); if(Res.getstatus () = =HttpStatus.BAD_REQUEST.value ()) {Logger.info ("Modify return status value is 200");        Res.setstatus (HttpStatus.OK.value ()); }        if(Einstanceofnullpointerexception) {Logger.error ("Code 00:" +e.getmessage (), E); returnResultentity.fail ("A null pointer exception occurred"); } Else if(Einstanceofillegalargumentexception) {Logger.error ("Code 01:" +e.getmessage (), E); returnResultentity.fail ("Request parameter Type Mismatch"); } Else if(EinstanceofSQLException) {Logger.error ("Code 02:" +e.getmessage (), E); returnResultentity.fail ("Database access exception"); } Else{logger.error ("Code 99:" +e.getmessage (), E); returnResultentity.fail ("Server code exception, please contact Administrator"); }    }}

Scenario 2: Using AOP Technology

Full code: "AOP" Springboot uniform exception handling for controller layer methods

Core code

• @Aspect annotations;
• Weave in point:
• The method return value is: resultentity
• All methods of all classes below the package with controller hierarchy
• @Around ("Execution (public com.ssslinppp.model.ResultEntity com). . Controller ... *(..))")

@Component @aspect Public classControlleraspect { Public Static FinalLogger Logger = Loggerfactory.getlogger (controlleraspect.class); @Around ("Execution (Public com.ssslinppp.model.ResultEntity com: *.controller. *.*(..))")     PublicObject Handlecontrollermethod (proceedingjoinpoint pjp) {Stopwatch Stopwatch=stopwatch.createstarted (); Resultentity<?>resultentity; Try{logger.info ("Execute controller start:" + pjp.getsignature () + "parameter:" +lists.newarraylist (Pjp.getargs ()). ToString ()); Resultentity= (resultentity<?>) Pjp.proceed (Pjp.getargs ()); Logger.info ("Execute controller end:" + pjp.getsignature () + ", return value:" +resultentity.tostring ()); Logger.info ("Time-consuming:" + stopwatch.stop (). Elapsed (Timeunit.milliseconds) + "(milliseconds)."); } Catch(Throwable throwable) {resultentity=handlerexception (PJP, throwable); }        returnresultentity; }    PrivateResultentity<?>handlerexception (Proceedingjoinpoint pjp, Throwable e) {resultentity<?> resultentity =NULL; if(Einstanceofruntimeexception) {Logger.error ("Runtimeexception{method:" + pjp.getsignature () + ", parameter:" + Pjp.getargs () + ", exception:" + e.getmessage () + "}", E); Resultentity=Resultentity.fail (E.getmessage ()); } Else{logger.error ("Exception {method:" + pjp.getsignature () + ", parameter:" + Pjp.getargs () + ", exception:" + e.getmessage () + "}", E); Resultentity=Resultentity.fail (E.getmessage ()); }        returnresultentity; }}

Springboot Unified exception handling for controller layer methods