我是 AOP 的新手。阅读《春天在行动》一书。有AOP的章节和例子。我已经用 XML 做到了，一切都很好。有Aspects的注释配置示例。我已经像书里那样做了一个，但它不起作用。请帮忙。
错误：
Exception in thread "main" org.springframework.beans.factory.BeanCreationException:
Error creating bean with name 'guitar' defined in class path resource [springIdolBeansAnnotation.xml]:
Initialization of bean failed; nested exception is java.lang.IllegalArgumentException: error at ::0 c
an't find referenced pointcut performance
带有名为 springIdolBeansAnnotation.xml 的 bean 的文件：
<?xml version="1.0" encoding="UTF-8"?>
<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">
<bean id="guitar" class="com.springinaction.springidol.Guitar"/>
<aop:aspectj-autoproxy/>
<bean id="kenny2" class="com.springinaction.springidol.Instrumentalist">
<property name="song" value="Jingle B"/>
<property name="instrument" ref="guitar"/>
</bean>
<bean id="audience" class="com.springinaction.springidol.Audience"/>
</beans>
档案吉他：
package com.springinaction.springidol;
public class Guitar implements Instrument {
@Override
public void play() {
System.out.println("Guitar playing");
}
}
文件乐器演奏家：
package com.springinaction.springidol;
public class Instrumentalist implements Performer {
private String song;
private Instrument instrument;
public Instrumentalist(){}
@Override
public void perform() throws Exception {
System.out.println("Playing "+song + " : ");
instrument.play();
}
public String getSong() {
return song;
}
public void setSong(String song) {
this.song = song;
}
public String screamSong(){
return song;
}
public void setInstrument(Instrument instrument) {
this.instrument = instrument;
}
}
文件受众（方面）：
package com.springinaction.springidol;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
@Aspect
public class Audience {
@Pointcut("execution(* com.springinaction.springidol.Performer.perform(..))")
public void performance(){}
@Before("performance()")
public void takeSeats(){
System.out.println("The audience is takig their seats");
}
@Before("performance()")
public void turnOffCellPhones(){
System.out.println("The audience is turning off their cellphones");
}
@AfterReturning("performance()")
public void applaud(){
System.out.println("CLAP CLAP CLAP CLAP CLAP");
}
@AfterThrowing("performance()")
public void demandRefund(){
System.out.println("Boo! We want our money back");
}
@Around("performance()")
public void watchPerformance(ProceedingJoinPoint joinpoint){
try {
System.out.println("Theaudienceistakingtheirseats.");
System.out.println("Theaudienceisturningofftheircellphones");
long start=System.currentTimeMillis();
joinpoint.proceed();
long end=System.currentTimeMillis();
System.out.println("CLAP CLAP CLAP CLAP CLAP");
System.out.println("Theperformancetook"+(end-start)
+ "milliseconds.");
} catch(Throwable t){
System.out.println("Boo!Wewantourmoneyback!");
}
}
}
主文件：
package com.springinaction.springidol;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class SpringIdolMain {
public static void main(String[] args) {
ApplicationContext ctx = new ClassPathXmlApplicationContext("springIdolBeansAnnotation.xml");
Performer performer = (Performer) ctx.getBean("kenny2");
try {
performer.perform();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}