标签：system frame org tty tor 127.0.0.1 dem context profile
参考：https://docs.spring.io/spring-framework/docs/4.3.9.RELEASE/spring-framework-reference/htmlsingle/#aop-aj-ltw-first-example
https://www.ibm.com/developerworks/cn/java/j-lo-springaopcglib/（Spring AOP 实现原理与 CGLIB 应用）
http://blog.csdn.net/a128953ad/article/details/50509437（比较分析 Spring AOP 和 AspectJ 之间的差别）
Aspect是实现AOP编程的一种具体实现
Aspect中有两种实现的方式：
1.使用Ajc编译器在编译器生成代理类
2.使用AspectJ LTW 在类加载时生成代理
主要的Bean
public class DemoBean { public void run() { System.out.println("Run"); } public void run1() { System.out.println("run1..."); } public void run2() throws Exception { TimeUnit.SECONDS.sleep(2); System.out.println("run2..."); } }
Aspect
import org.aspectj.lang.ProceedingJoinPoint; import org.aspectj.lang.annotation.Around; import org.aspectj.lang.annotation.Aspect; import org.aspectj.lang.annotation.Pointcut; import org.springframework.util.StopWatch; @Aspect public class ProfilingAspect { @Around("profileMethod()") public Object profile(ProceedingJoinPoint pjp) throws Throwable { StopWatch sw = new StopWatch(getClass().getSimpleName()); try { sw.start(pjp.getSignature().getName()); return pjp.proceed(); } finally { sw.stop(); System.out.println(sw.prettyPrint()); } } @Pointcut("execution(* com.jxufe.study.spring.aspect..*.*(..))") public void profileMethod() { } }
META-INF/aop.xml （这个路径和名字是确定的）
<!DOCTYPE aspectj PUBLIC "-//AspectJ//DTD//EN" "http://www.eclipse.org/aspectj/dtd/aspectj.dtd"> <aspectj> <weaver> <!-- only weave classes in our application-specific packages --> <include within="com.jxufe.study.spring.aspect.*"/> </weaver> <aspects> <!-- weave in just this aspect --> <aspect name="com.jxufe.study.spring.aspect.ProfilingAspect"/> </aspects> </aspectj>
最后的aspect.xml
<?xml version="1.0" encoding="GBK"?> <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" xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"> <context:load-time-weaver/> <bean id="demoBean" class="com.jxufe.study.spring.aspect.DemoBean"></bean> </beans>
Test类
public static void main(String[] args) throws Exception { ApplicationContext ctx = new ClassPathXmlApplicationContext("/META-INF/aspect.xml", Main.class); /* DemoBean demoBean = (DemoBean) ctx.getBean("de"); */ DemoBean demoBean = new DemoBean(); demoBean.run(); demoBean.run1(); demoBean.run2();
运行时添加 jvm 参数 -javaagent:C:\Users\1\.m2\repository\org\springframework\spring-instrument\4.3.9.RELEASE\spring-instrument-4.3.9.RELEASE.jar
输出结果：
Run StopWatch ‘ProfilingAspect‘: running time (millis) = 0 ----------------------------------------- ms % Task name ----------------------------------------- 00000 ? run run1... StopWatch ‘ProfilingAspect‘: running time (millis) = 1 ----------------------------------------- ms % Task name ----------------------------------------- 00001 100% run1 Disconnected from the target VM, address: ‘127.0.0.1:52489‘, transport: ‘socket‘ run2... StopWatch ‘ProfilingAspect‘: running time (millis) = 2003 ----------------------------------------- ms % Task name ----------------------------------------- 02003 100% run2
这里的Test类中，这个Bean中使用的是DemoBean demoBean = new DemoBean();但结果却是实现了AOP的效果。
标签：system frame org tty tor 127.0.0.1 dem context profile
原文地址：http://www.cnblogs.com/alway-july/p/7793326.html
