17-spring aop调用过程概述

1.源码

public class TestAop {public static void main(String[] args) throws Exception {saveGeneratedCGlibProxyFiles(System.getProperty("user.dir") + "/proxy");ApplicationContext ac = new ClassPathXmlApplicationContext("META-INF/aop.xml");MyCalculator bean = ac.getBean(MyCalculator.class);System.out.println(bean.toString());bean.add(1, 1);bean.sub(1, 1);}public static void saveGeneratedCGlibProxyFiles(String dir) throws Exception {Field field = System.class.getDeclaredField("props");field.setAccessible(true);Properties props = (Properties) field.get(null);//dir为保存文件路径System.setProperty(DebuggingClassWriter.DEBUG_LOCATION_PROPERTY, dir);props.put("net.sf.cglib.core.DebuggingClassWriter.traceEnabled", "true");}
}

public class MyCalculator /*implements Calculator */ {public Integer add(Integer i, Integer j) throws NoSuchMethodException {Integer result = i + j;System.out.println("MyCalculator add method invoked");return result;}public Integer sub(Integer i, Integer j) throws NoSuchMethodException {Integer result = i - j;return result;}public Integer mul(Integer i, Integer j