所謂Spring靜態切入點，相對于動態切入點來說，具有良好的性能，因為靜態切入點只在代理創建時候執行一次，而不是在運行期間，每次目標方法執行前都進行執行，下面，以實例說明如何定義靜態切入點
?
看我我前一篇blog的朋友都知道，如果不定義切入點，通知方法是會對整個目標類的所有方法均進行切入的
但實際需求中，我們可能對其中的幾個方法執行A通知，對其他的方法執行B通知，這時候，就需要通過定義不同的切入點來進行區分
目標接口：
?
package
?StaticAdvisorTest;
public
?
interface
?Shopping?
{
??
public
?String?buySomething(String?type);
??
public
?String?buyAnything(String?type);
??
public
?String?sellSomething(String?type);
??
public
?String?sellAnything(String?type);
}
?javabean:
?
package
?StaticAdvisorTest;
public
?
class
?Customer?
{
??
private
?String?name;
??
private
?String?age;
??
public
?Customer()
{
??
??????
??}
??
public
?Customer(String?name,String?age)
{
??????
this
.name
=
name;
??????
this
.age
=
age;
??}
public
?String?getAge()?
{
????
return
?age;
}
public
?
void
?setAge(String?age)?
{
????
this
.age?
=
?age;
}
public
?String?getName()?
{
????
return
?name;
}
public
?
void
?setName(String?name)?
{
????
this
.name?
=
?name;
}
}
?
業務目標實現類：
?
package
?StaticAdvisorTest;
public
?
class
?ShoppingImpl?
implements
?Shopping?
{
????
private
?Customer?customer;
????
public
?Customer?getCustomer()?
{
????????
return
?customer;
????}
????
public
?
void
?setCustomer(Customer?customer)?
{
????????
this
.customer?
=
?customer;
????}
????
public
?String?buySomething(String?type)?
{
????????System.out.println(
this
.getCustomer().getName()
+
"
?bye?
"
+
type
+
"
?success
"
);
????????
return
?
null
;
????}
????
????
public
?String?buyAnything(String?type)?
{
???????System.out.println(
this
.getCustomer().getName()
+
"
?bye?
"
+
type
+
"
?success
"
);
???????
return
?
null
;
?????}
????
public
?String?sellAnything(String?type)?
{
????????System.out.println(
this
.getCustomer().getName()
+
"
?sell?
"
+
type
+
"
?success
"
);
????????
return
?
null
;
????}
????
public
?String?sellSomething(String?type)?
{
?????????System.out.println(
this
.getCustomer().getName()
+
"
?sell?
"
+
type
+
"
?success
"
);
???????????
return
?
null
;
????}
}
?
通知（切面）方法：
?
package
?StaticAdvisorTest;
import
?java.lang.reflect.Method;
import
?org.springframework.aop.MethodBeforeAdvice;
//
前置通知
public
?
class
?WelcomeAdvice?
implements
?MethodBeforeAdvice?
{
????
public
?
void
?before(Method?method,?Object[]?args,?Object?obj)
????????????
throws
?Throwable?
{
????????String?type
=
(String)args[
0
];
????????System.out.println(
"
Hello?welcome?to?buy?
"
+
type);
????}
}
?
下面是重點，我們想對所有的buy方法進行通知處理，也就是在所有的buy方法上定義切面
spring為我們創建了靜態切入點的父類 StaticMethodMatcherPointCut ,如果我們想實現自制的靜態切入點，只要繼承這個類就可以了，不過一般情況下，我們使用spring提供的靜態切入點NameMatchMethodPointCut就足夠了
配置文件如下：
?
<?
xml?version="1.0"?encoding="UTF-8"
?>
<!
DOCTYPE?beans?PUBLIC?"-//SPRING//DTD?BEAN//EN"?"http://www.springframework.org/dtd/spring-beans.dtd"?
>
<
beans
>
?
<
bean?
id
="customer"
?class
="StaticAdvisorTest.Customer"
>
???
<
constructor-arg?
index
="0"
>
?????
<
value
>
gaoxiang
</
value
>
???
</
constructor-arg
>
????
<
constructor-arg?
index
="1"
>
?????
<
value
>
26
</
value
>
???
</
constructor-arg
>
?
</
bean
>
?
<
bean?
id
="shoppingImpl"
?class
="StaticAdvisorTest.ShoppingImpl"
>
???
<
property?
name
="customer"
>
?????
<
ref?
local
="customer"
/>
???
</
property
>
?
</
bean
>
<!--
?定義通知?
-->
<
bean?
id
="shoppingAdvise"
?class
="StaticAdvisorTest.WelcomeAdvice"
></
bean
>
<!--
?定義切入點?
-->
<
bean?
id
="shoppingPointCutAdvisor"
?class
="org.springframework.aop.support.NameMatchMethodPointcutAdvisor"
>
??
<
property?
name
="mappedName"
>
????
<
value
>
sell*
</
value
>
??
</
property
>
??
<
property?
name
="advice"
>
????
<
ref?
bean
="shoppingAdvise"
/>
??
</
property
>
</
bean
>
<!--
?定義代理?
-->
<
bean?
id
="StaticAdvisorTest"
?class
="org.springframework.aop.framework.ProxyFactoryBean"
>
??
<
property?
name
="proxyInterfaces"
>
????
<
value
>
StaticAdvisorTest.Shopping
</
value
>
??
</
property
>
??
<
property?
name
="interceptorNames"
>
????
<
list
>
??????
<
value
>
shoppingPointCutAdvisor
</
value
>
????
</
list
>
??
</
property
>
??
<
property?
name
="target"
>
????
<
ref?
bean
="shoppingImpl"
/>
??
</
property
>
</
bean
>
</
beans
>
?<!-- 如果不使用通配符，則用以下表達
? <property name="mappedNames">
??? <list>
?????? <value>sellSomething</value>
?????? <value>sellAnything</value>
??? </list>
? </property>
? -->
測試程序：
?
package
?StaticAdvisorTest;
import
?java.io.File;
import
?org.springframework.beans.factory.BeanFactory;
import
?org.springframework.beans.factory.xml.XmlBeanFactory;
import
?org.springframework.core.io.FileSystemResource;
public
?
class
?TestAdvisor?
{
????
public
?
static
?
void
?main(String[]?args)?
{
????????String?filePath
=
System.getProperty(
"
user.dir
"
)
+
File.separator
+
"
StaticAdvisorTest
"
+
File.separator
+
"
hello.xml
"
;
????????
????????BeanFactory?factory
=
new
?XmlBeanFactory(
new
?FileSystemResource(filePath));
????????
????????Shopping?shopping
=
null
;
????????shopping
=
(Shopping)factory.getBean(
"
StaticAdvisorTest
"
);
????????shopping.buySomething(
"
something
"
);
????????shopping.buyAnything(
"
anything
"
);
????????shopping.sellAnything(
"
anything
"
);
????????shopping.sellSomething(
"
something
"
);
????????
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