提到代理，我们可以使用ProxyBeanFactory，并配置proxyInterfaces,target和interceptorNames实现，但如果需要代理的bean很多，无疑会对spring配置文件的编写带来繁重的工作
Spring为我们提供了，根据beanName匹配后进行自动代理的解决方法
业务接口
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);
}
业务实现类A，作为配置文件中的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
;
}
}
业务实现类B，作为配置文件中的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为buy*,意味着所有以buy开头的bean,都被spring容易自动代理，执行相应的切面通知
<?
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
>
测试代码：
在测试代码中，我们的buyBean打印两条买的信息，sellBean打印两条卖的信息，可以看到buyBean执行的方法已经进行了切面处理
需要注意的是，如果使用自动代码，则获得Spring Bean工厂要用
ApplicationContext ctx=new FileSystemXmlApplicationContext(filePath);
而不能用
BeanFactory factory=new XmlBeanFactory(new FileSystemResource(filePath));
原因我想是因为BeanFactory在初始化时并不实例化单例的Bean,而ApplicationContext则在初始化时候全部实例化了Bean,自动代理需要在初始化时候定义好代理关系
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
