提到代理，我們可以使用ProxyBeanFactory，并配置proxyInterfaces,target和interceptorNames實現，但如果需要代理的bean很多，無疑會對spring配置文件的編寫帶來繁重的工作
Spring為我們提供了，根據beanName匹配后進行自動代理的解決方法
業務接口
?
package
?AutoProxyOne;
public
?
interface
?Shopping?
{
??
public
?String?buySomething(String?type);
??
public
?String?buyAnything(String?type);
??
public
?String?sellSomething(String?type);
??
public
?String?sellAnything(String?type);
}
?業務實現類A，作為配置文件中的buyBean：
?
package
?AutoProxyOne;
public
?
class
?ShoppingImplA?
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
;
????}
}
?
?業務實現類B，作為配置文件中的sellBean：
?
package
?AutoProxyOne;
public
?
class
?ShoppingImplB?
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
;
????}
}
?
切面通知：
?
package
?AutoProxyOne;
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?
{
????????
????????System.out.println(
"
Hello?welcome?to?bye?
"
);
????}
}
?
配置文件：
其中beanNames為buy*,意味著所有以buy開頭的bean,都被spring容易自動代理，執行相應的切面通知
?
<?
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
="WelcomeAdvice"
?class
="AutoProxyOne.WelcomeAdvice"
>
?
</
bean
>
?
?
<
bean??
class
="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator"
>
???
<
property?
name
="beanNames"
>
?????
<
list
>
???????
<
value
>
buy*
</
value
>
?????
</
list
>
???
</
property
>
???
<
property?
name
="interceptorNames"
>
?????
<
list
>
????????
<
value
>
WelcomeAdvice
</
value
>
?????
</
list
>
?
???
</
property
>
?
</
bean
>
???
??
<
bean?
id
="buyBean"
?class
="AutoProxyOne.ShoppingImplA"
>
????
<
property?
name
="customer"
>
??????
<
ref?
bean
="customer"
/>
????
</
property
>
???
</
bean
>
?
<
bean?
id
="sellBean"
?class
="AutoProxyOne.ShoppingImplB"
>
????
<
property?
name
="customer"
>
??????
<
ref?
bean
="customer"
/>
????
</
property
>
???
</
bean
>
<
bean?
id
="customer"
?class
="AutoProxyOne.Customer"
>
???
<
constructor-arg?
index
="0"
>
?????
<
value
>
gaoxiang
</
value
>
???
</
constructor-arg
>
????
<
constructor-arg?
index
="1"
>
?????
<
value
>
26
</
value
>
???
</
constructor-arg
>
?
</
bean
>
</
beans
>
?
測試代碼：
在測試代碼中，我們的buyBean打印兩條買的信息，sellBean打印兩條賣的信息，可以看到buyBean執行的方法已經進行了切面處理
需要注意的是，如果使用自動代碼，則獲得Spring Bean工廠要用
ApplicationContext ctx=new FileSystemXmlApplicationContext(filePath);
而不能用
BeanFactory factory=new XmlBeanFactory(new FileSystemResource(filePath));
原因我想是因為BeanFactory在初始化時并不實例化單例的Bean,而ApplicationContext則在初始化時候全部實例化了Bean,自動代理需要在初始化時候定義好代理關系
?
package
?AutoProxyOne;
import
?java.io.File;
import
?org.springframework.beans.factory.BeanFactory;
import
?org.springframework.beans.factory.xml.XmlBeanFactory;
import
?org.springframework.context.ApplicationContext;
import
?org.springframework.context.support.FileSystemXmlApplicationContext;
import
?org.springframework.core.io.FileSystemResource;
import
?org.springframework.aop.support.RegexpMethodPointcutAdvisor;
public
?
class
?TestAdvisor?
{
????
public
?
static
?
void
?main(String[]?args)?
{
????????String?filePath
=
System.getProperty(
"
user.dir
"
)
+
File.separator
+
"
AutoProxyOne
"
+
File.separator
+
"
hello.xml
"
;
????????
????????BeanFactory?factory
=
new
?XmlBeanFactory(
new
?FileSystemResource(filePath));
????????ApplicationContext?ctx
=
new
?FileSystemXmlA
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