Spring AOP面向切面编程一个简单例子和在配置过程中出现错误

package soundSystem;
//定义CD接口i
public interface CompactDisc {
void play();
void playTrack(int i);
}

定义空CD类，继承CDpackage soundSystem;

import org.springframework.stereotype.Component;

import java.util.List;

@Component

public class BlankDisc implements CompactDisc {

public String getTitle() {
return title;
}

public void setTitle(String title) {
this.title = title;
}

public String getArtist() {
return artist;
}

public void setArtist(String artist) {
this.artist = artist;
}

public List<String> getTracks() {
return tracks;
}

public void setTracks(List<String> tracks) {
this.tracks = tracks;
}

private String title;
private String artist;
private List<String> tracks;

public BlankDisc() {
}

public BlankDisc(String artist, String title, List<String> tracks) {
this.artist = artist;
this.title = title;
this.tracks = tracks;
}

public void play() {
System.out.println("Playing " + title + " by " + artist);
for (String track: tracks) {
System.out.println("-Track: " + track);
}
}

public void playTrack(int num) {
System.out.println("-Track: " + tracks.get(num));
}
}实现切面package soundSystem;

import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;

import java.util.HashMap;
import java.util.Map;

@Aspect
public class TrackCounter {
private Map<Integer, Integer> trackCounts =
new HashMap<>();
@Pointcut(//定义切点
"execution(* soundSystem.CompactDisc.playTrack(int))"+
"&& args(trackNumber)")
public void trackPlayed(int trackNumber){}

@Before("trackPlayed(trackNumber)")//在切点前执行
public void countTrack(int trackNumber){
System.out.println(trackNumber);
int currentCount = getPlayCount(trackNumber);
trackCounts.put(trackNumber, currentCount + 1);
}
public int getPlayCount(int trackNumber) {
System.out.println(trackNumber);
return trackCounts.containsKey(trackNumber) ?
trackCounts.get(trackNumber) : 0;
}
}配置切面，注入Bean

package soundSystem;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.EnableAspectJAutoProxy;

import java.util.ArrayList;
import java.util.List;

@Configuration
@EnableAspectJAutoProxy

public class TrackCounterConfig {
@Bean
public CompactDisc sgtPeppers() {
BlankDisc cd = new BlankDisc();
cd.setTitle("Sgt. Pepper's Lonely Hearts Club Band");
cd.setArtist("The Beatles");
List<String> tracks = new ArrayList<String>();
tracks.add("Sgt. Pepper's Lonely Hearts Club Band");
tracks.add("With a Little Help from My Friends");
tracks.add("Lucky in the Sky with Diamonds");
tracks.add("Getting Better");
tracks.add("Fixing a Hole");
tracks.add("zzzz");
tracks.add("justinniu");
cd.setTracks(tracks);
return cd;
}

@Bean
public TrackCounter trackCounter() {
return new TrackCounter();
}
}

最后测试package soundSystem;

import org.junit.Rule;
import org.junit.Test;
import org.junit.contrib.java.lang.system.StandardOutputStreamLog;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import static org.junit.Assert.assertEquals;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = TrackCounterConfig.class)
public class TrackCounterTest {

@Autowired
private CompactDisc cd;

@Autowired
private TrackCounter counter;

@Test
public void testTrackCounter() {
cd.playTrack(0);
cd.playTrack(1);
cd.playTrack(2);
cd.playTrack(2);
cd.playTrack(2);
cd.playTrack(2);
cd.playTrack(6);
cd.playTrack(6);

assertEquals(1, counter.getPlayCount(0));
assertEquals(1, counter.getPlayCount(1));
assertEquals(4, counter.getPlayCount(2));
assertEquals(0, counter.getPlayCount(3));
assertEquals(0, counter.getPlayCount(4));
assertEquals(0, counter.getPlayCount(5));
assertEquals(2, counter.getPlayCount(6));
}

public void setCounter(TrackCounter counter) {
this.counter = counter;
}

public TrackCounter getCounter() {
return counter;
}

public void setCd(BlankDisc cd) {
this.cd = cd;
}

public CompactDisc getCd() {
return cd;
}
}

遇到的错误1.Spring 切面没有运行成功，没有@Aspect，会出现cd.trackPlay()但是切面并没有执行，测试也会报错。
2. 如果已经@Aspect但报出如下的错误，说明没有配置好jar，需要aspectjrt-1.8.xx.jar 和aspectjweaver-1.8.xx.jarjava.lang.IllegalStateException: Failed to load ApplicationContext3.@Rule
      public final StandardOutputStreamLog log = new StandardOutputStreamLog();
    添加这个会把输出记录到日志里，所有调试输出测试也不可见