spring aop 之xml

1、类库

2.aop概念

  

一个切面可以有多个切点

3.在方法前后进行aop的测试代码

3.1aop.xml

<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.xsd
     http://www.springframework.org/schema/aop
     http://www.springframework.org/schema/aop/spring-aop.xsd">

    <bean id="audience" class="com.lzp.aop.Audience" />
    <bean class="com.lzp.aop.Guitar" id="guitar">
        <constructor-arg name="name" value="吉他"></constructor-arg>
    </bean>
    <bean id="eddie" class="com.lzp.aop.Instrumentalist">
        <property name="instrument" ref="guitar" />
    </bean>
    <bean id="testPerformer" class="com.lzp.aop.TestPerformer"></bean>



    <bean id="logger" class="com.lzp.aop.WriterLogger" />

    <bean id="loan" class="com.lzp.aop.TestLoan" />
    <bean id="person" class="com.lzp.aop.Person">
        <constructor-arg name="name" value="小名"></constructor-arg>
    </bean>


    <aop:config>
        <!--参数执行时间点 -->
        <aop:aspect ref="audience">
            <aop:pointcut expression="execution(* com.lzp.aop.Performer.perform(..))"
                id="performerPointCut" />
            <aop:before pointcut-ref="performerPointCut" method="takeSeats" />


            <aop:before pointcut-ref="performerPointCut" method="turnOffCellPhones" />


            <aop:after-returning pointcut-ref="performerPointCut"
                method="applaud" />


            <aop:after-throwing pointcut-ref="performerPointCut"
                method="demandRefund" />

        </aop:aspect>
        <!-- 捕获带参数的方法执行 -->
        <aop:aspect ref="logger">
            <aop:pointcut
                expression="execution(* com.lzp.aop.Loan.transfer(com.lzp.aop.Person)) and args(person)"
                id="performerPointCut2" />
            <aop:before method="Log" pointcut-ref="performerPointCut2"
                arg-names="person" />
        </aop:aspect>
    </aop:config>
    <!--<end id="audience_aspect" /> -->

</beans>

3.2 类和接口

//Instrument 
public abstract class Instrument {

    public Instrument(String name) {
        this.name = name;
    }

    public String name;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public abstract void play();
}
//Performer 
public interface Performer {
    void perform() throws PerformanceException;

}

//Instrumentalist 
public class Instrumentalist implements Performer {
    public void perform() throws PerformanceException {
        instrument.play();
    }

    private Instrument instrument;

    public void setInstrument(Instrument instrument) {
        this.instrument = instrument;
    }

//Guitar 
public class Guitar extends Instrument {
    public Guitar(String name) {
        super(name);
    }

    public void play() {
        System.out.println(name + "Strum strum strum");
    }
}

    public Instrument getInstrument() {
        return instrument;
    }

}

3.3mainTest

ApplicationContext context = new ClassPathXmlApplicationContext(
                "aop.xml");
        
        /*   Performer performer = (Performer) context.getBean("eddie");
           
           performer.perform();*/

4.获取方法传参的aop测试

4.1xml同上

4.2类和接口代码

public class Person {
    private String name;

    public Person(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
    
}

public interface Loan {
    void transfer(Person person);
}

public class TestLoan implements Loan {

    @Override
    public void transfer(Person person) {
 
    } 
}

public interface Logger {
    void Log(Person Person);
    Person getPerson();
}

public class WriterLogger implements Logger {
    
    private Person person;
    @Override
    public void Log(Person person) {
        // TODO Auto-generated method stub
        System.out.println("拦截带参数测试:person 的name为"+person.getName());
        this.person=person;
    }

    @Override
    public Person getPerson() {
        // TODO Auto-generated method stub
        return this.person;
    }

 

}

上面实例主要记录了获取person类型参数的然后进行记录日志。

mainTest

    ApplicationContext context = new ClassPathXmlApplicationContext(
                "aop.xml");
        
        /*   Performer performer = (Performer) context.getBean("eddie");
           
           performer.perform();*/
         

        Loan loan = (Loan) context.getBean("loan");
        Person person = (Person) context.getBean("person");
        loan.transfer(person);