Spring-AOP-Exception

Public interface PersonDao {public invalid savePerson () throws an exception; Public invalid updatePerson () throws an exception; Public invalid deletePerson () throws an exception ;}

Public class PersonDaoImp ?? L implement PersonDao {@ override public invalid savePerson () throw an exception {// TODO automatically generate the method stub System. out. println ("Releaser"); int a = 1/0;} @ overwrite public invalid updatePerson () throw an exception {// TODO automatically generate method stub System. out. println ("updated by"); int a = 1/0;} @ overwrite () of deletePerson, which is public and invalid. An exception is thrown. {// TODO automatically generates the method stub System. out. println ("deleted by"); int a = 1/0 ;}}

Public interface PersonService {public invalid savePerson () throws an exception; Public invalid updatePerson () throws an exception; Public invalid deletePerson () throws an exception ;}

Public class PersonServiceImpl implements PersonService {private PersonDao personDao; Public PersonDao getPersonDao () {returns personDao;} public invalid setPersonDao (PersonDao personDao) {this. personDao = personDao;} @ overwrite public invalid savePerson () throw an exception {this. personDao. savePerson () ;}@ override public invalid updatePerson () throw an exception {this. personDao. updatePerson () ;}@ overwrite deletePerson's () thrown by the Public invalid {this. personDao. deletePerson ();}}

Public PersonAction {private PersonService personService; Public PersonService getPersonService () {returns personService;} public invalid setPersonService (PersonService personService) {this. personService = personService;} public invalid savePerson () throw an exception {this. personService. savePerson ();} public invalid updatePerson () throw an exception {this. personService. updatePerson ();} The deletePerson () Public invalid throw an exception {this. personService. deletePerson ();}}

/*** Aspect ** @ author administrator **/public class MyException {/*** write an exception notification */Public invalid getExcpetionMessage (Throwable EX) {System. out. println (ex. getMessage ());}}

<? XML version = 1.0 encoding = UTF-8?>
 <豆的xmlns =“htt??p: www.springframework.org schema beans”的xmlns：aop="“htt??p://www.springframework.org/schema/aop”的xmlns：XSI" www.w3.org 2001 xmlschema-instance”xsi：的schemalocation="“htt??p://www.springframework.org/schema/beans" http: beans spring-beans-2.5.xsd aop spring-aop-2.5.xsd“>
  
<! -1. Import the class of the action, service, and DAO layer to 2, declare aspect 3, and configure AOP.->
     
    
     
         
      
       
          
        Aspect ref = "myException">
         
        
       
      
     
    
   
  
 

Exception Handling

<喎?http: www.bkjia.com kf ware vc " target="_blank" class="keylink"> VcD4KPHA + PHByZSBjbGFzcz0 = "brush: java;">/*** total interface of business logic ** @ author administrator **/public interface service {public object service (ServiceMapping serviceMapping) throw an exception ;}

Public class ServiceMapping {private string service class; // Method for encapsulating the full name of the service private string; // method of a Service Public String getServiceClass () {return service class ;} public invalid setServiceClass (string service class) {this. serviceClass = service class;} The Public String implements getMethod () {return method;} the public is invalid and setMethod (string method) {this. method = method ;}}

Public class PersonServiceImpl implementation service {@ override public object service (ServiceMapping serviceMapping) throw an exception {/*** serviceMapping * service class cn. itcast. exception. service. studentServiceImpl * methodName's savePerson */string method name = serviceMapping. getMethod (); Class of object obj =. forName (serviceMapping. getServiceClass () newInstance (); method = Class. forName (serviceMapping. getServiceClass () implements getMethod (method name); Return method. invoke (OBJ );}}

public class ExceptionTest {@Testpublic void test(){ServiceMapping serviceMapping = new ServiceMapping();serviceMapping.setServiceClass("cn.itcast.exception.service.StudentServiceImpl");serviceMapping.setMethod("savePerson");ServiceInvocation.execution(serviceMapping);}}

Public class ServiceInvocation {/*** this method is the total call interface of the service, so you can handle exceptions in a unified manner here * @ param serviceMapping * @ return */public static Object execution (ServiceMapping serviceMapping) {/*** serviceMapping * service class cn. itcast. exception. service. studentServiceImpl * methodName's savePerson */try {Service service = (Service) Class. forName (serviceMapping. getServiceClass ()). newInstance (); service. service (serviceMapping);} catch (Exception e) {e. printStackTrace ();} return null ;}}