java Spring AOP 配置（XML）
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Spring AOP Configuration (XML)
提问by IAmYourFaja
I am experimenting with Spring AOP for the first time and get stuck in the XML configuration. I'm trying to get a mock version of AOP-based "logging" up and running, using a MethodInterceptorto wrap specific method calls and do some simple System.out.printlnstatements before and after those method invocations. Simple stuff, right?
我第一次尝试 Spring AOP 并陷入 XML 配置。我正在尝试启动并运行基于 AOP 的“日志记录”的模拟版本，使用 aMethodInterceptor来包装特定的方法调用System.out.println并在这些方法调用之前和之后执行一些简单的语句。简单的东西，对吧？
So my project has many classes, two of them are Fizzand Buzz. Fizz has a method named foo()and Buzz has a method named wapap(). Every time these methods are invoked at runtime, I want my LoggingInterceptorto execute its invoke() method around them:
所以我的项目有很多类，其中两个是Fizz和Buzz。Fizz 有一个名为 的方法foo()，Buzz 有一个名为 的方法wapap()。每次在运行时调用这些方法时，我都希望LoggingInterceptor围绕它们执行其 invoke() 方法：
public class LoggingInterceptor implements MethodInterceptor
{
public Object invoke(MethodInvocation methodInvocation)
{
try
{
System.out.println("About to call a special method.");
Object result = methodInvocation.proceed();
return result;
}
finally
{
System.out.println("Finished executing the special method.");
}
}
}
So I understand the concepts of advice (my interceptor impl), pointcuts (the methods that will have advice executed around them), and pointcut advisors (bindings between advice and pointcuts).
所以我理解建议（我的拦截器实现）、切入点（将在它们周围执行建议的方法）和切入点顾问（建议和切入点之间的绑定）的概念。
I'm just struggling tying it altogether in a simple XML config.
我只是在努力将它完全绑定在一个简单的 XML 配置中。
Here's what I have so far, but I know it's missing pointcut and pointcut advisor definitions, and possibly more.
这是我到目前为止所拥有的，但我知道它缺少切入点和切入点顾问定义，可能还有更多。
<beans default-autowire="no" >
<bean name="loggingInterceptor" class="org.me.myproject.aop.LoggingInterceptor"/>
</beans>
What am I missing here to make this specific to Fizz::foo() and Buzz::wapap() calls?
我在这里错过了什么来使这个特定于 Fizz::foo() 和 Buzz::wapap() 调用？
Any nudges in the right direction are enormously appreciated!
任何朝着正确方向的推动都非常感谢！
回答by Tomasz Nurkiewicz
Add this:
添加这个：
<aop:config>
<aop:advisor advice-ref="loggingInterceptor" pointcut="execution(public * Fizz.foo(..))"/>
<aop:advisor advice-ref="loggingInterceptor" pointcut="execution(public * Buzz.wapap(..))"/>
</aop:config>
You also need to add AOP namespace declaration in version appropriate to your framework:
您还需要在适合您的框架的版本中添加 AOP 命名空间声明：
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
">
Also consider using @AspectJ aspects and see this question: Spring: Standard Logging aspect (interceptor).
还可以考虑使用 @AspectJ 方面并查看这个问题：Spring: Standard Logging aspect (interceptor)。
回答by danny.lesnik
If you are using Spring 2.5+ you can use annotation to and create your advice and Pointcuts.
如果您使用的是 Spring 2.5+，您可以使用注解来创建您的建议和切入点。
Create class with @Aspectannotation.
使用@Aspect注释创建类。
Create @PointCutfor specific class and specific method and then create @Aroundadvice.
创建@PointCut特定类和具体方法，然后创建@Around建议。
You can read short tutorial how to do it here:
您可以在此处阅读如何操作的简短教程：
http://veerasundar.com/blog/2010/01/spring-aop-example-profiling-method-execution-time-tutorial/
http://veerasundar.com/blog/2010/01/spring-aop-example-profiling-method-execution-time-tutorial/
It' very easy to implement.
这很容易实现。
