Spring aspect-oriented programming (AOP)

is essentially a proxy, just made a configuration file form.

base class

Package _10springaop;public class Person {public int id;public String name;public int getId () {return ID;} public void setId (int id) {this.id = ID;} Public String GetName () {return name;} public void SetName (String name) {this.name = name;}}

DAO Interface

Package _10springaop;public interface Persondao {public String Saveperson (person person);

DAO Interface Implementation

Package _10springaop;public class Persondaoimpl implements Persondao {@Overridepublic String Saveperson (person person) { TODO auto-generated method stub//test SPRINGAOP error handling//int a = 1/0; System.out.println ("Save Person"); return "Saveperson";}}

Slice class

Package _10springaop;import Org.aspectj.lang.proceedingjoinpoint;public class Mytransaction {public void BeginTransaction () {System.out.println ("BeginTransaction");} public void commit (Object var) {System.out.println ("commit"); System.out.println ("var is" + var);} public void Finalmethod () {System.out.println ("the Finally Method"); public void Throwmethod (Throwable ex) {System.out.println ("ex is" + ex.tostring ());} public void Aroundmethod (Proceedingjoinpoint point) throws throwable{//gets the name of the target method System.out.println ("method is" + Point.getsignature (). GetName ());//Call target method//point.proceed (); System.out.println ("End");}}

Test Class

Package _10springaop;import Org.springframework.context.applicationcontext;import Org.springframework.context.support.classpathxmlapplicationcontext;public class Test {//begintransaction//method Is Saveperson//save Person//commit//var is saveperson//the finally Method//end//aroundmethod method is not called at the time// Begintransaction//method is saveperson//end//does not call, then the target method and the subsequent post method, and so on all do not call public static void main (string[] args) {// TODO Auto-generated Method Stubapplicationcontext context = new Classpathxmlapplicationcontext (" Applicationcontext.xml ");//If it is Persondao, there is an implementation interface to   produce a proxy object//If it is a persondaoimpl, no implementation interface   produces the target object Persondao Persondao =  (_10springaop.persondao) Context.getbean ("Persondao");p Ersondao.saveperson (new Person ());}}

configuration file

<?xml version= "1.0" encoding= "UTF-8"? ><beans xmlns= "Http://www.springframework.org/schema/beans" xmlns: aop= "HTTP://WWW.SPRINGFRAMEWORK.ORG/SCHEMA/AOP" xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance" xsi: schemalocation= "Http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring- Beans-2.5.xsd HTTP://WWW.SPRINGFRAMEWORK.ORG/SCHEMA/AOP http://www.springframework.org/schema/aop/spring-aop-2.5 . xsd "><!--Spring AOP namespaces need to be added yourself http://www.springframework.org/schema/beans/spring-beans-2.5.xsd htt P://WWW.SPRINGFRAMEWORK.ORG/SCHEMA/AOP http://www.springframework.org/schema/aop/spring-aop-2.5.xsd Spring AOP also requires two jar packages Aspectjrt.jar Aspectjweaver.jar import target class, import facets--<bean id= "Persondao" Clas s= "_10springaop.persondaoimpl" ></bean><bean id= "mytransaction" class= "_10SpringAOP.MyTransaction" ></bean><aop:config><aop:pointcut expression= "Execution (* _10springaop.persondaoimpl.* (..)) " Id= "perform"/><aop:aspect ref= "mytransaction" ><aop:before method= "BeginTransaction" pointcut-ref= " Perform "/><!--remember to add returning--><aop:after-returning method=" commit "pointcut-ref=" perform "returning=" var "/><aop:after method=" Finalmethod "pointcut-ref=" perform "/><!--remember to add throwsing--&GT;&LT;AOP: After-throwing method= "Throwmethod" pointcut-ref= "perform" throwing= "ex"/><aop:around method= "AroundMethod" pointcut-ref= "perform"/></aop:aspect></aop:config></beans>

Spring aspect-oriented programming (AOP)