\`\`\`java interface AService{ void fly(); } class AServiceImpl implements AService{ @Override public void fly(){ System.out.println("fly......"); } } \`\`\` \`\`\`java // jdk自带动态代理实现方式 class JDKHandler implements InvocationHandler { private Object obj; @Override public Object invoke(Object proxy, Method method, Object\[\] args) throws Throwable { // proxy是生成的代理类对象 System.out.println("开始时间："+System.currentTimeMillis()); Object ret = method.invoke(obj,args); System.out.println("结束时间："+System.currentTimeMillis()); return ret; // 返回原方法的结果 } public JDKHandler(Object obj){ this.obj = obj; } } \`\`\` \`\`\`java // cglib方式 class CglibHandler implements MethodInterceptor { @Override public Object intercept(Object obj, Method method, Object\[\] args, MethodProxy proxy) throws Throwable { // proxy 是代理的方法对象 System.out.println("开始时间："+System.currentTimeMillis()); Object ret = proxy.invokeSuper(obj,args); // 注意此处是invokSuper System.out.println("结束时间："+System.currentTimeMillis()); return ret } } \`\`\` \`\`\`java public class Main { public static void main(String\[\] args) { AService service = new AServiceImpl(); AService proxy = (AService) Proxy.newProxyInstance( AService.class.getClassLoader(), service.getClass().getInterfaces(), // 此处是子类实现的接口，根据子类获取，不能根据接口类获取 // Aservice.class.getInterfaces() 错误 // AserviceImpl.class.getInterfaces() new JDKHandler(service)); proxy.fly(); } } \`\`\` \`\`\`java public class Main { public static void main(String\[\] args) { Enhancer enhancer = new Enhancer(); enhancer.setSuperclass(AServiceImpl.class);// 此处是子类，不是接口，要注意 enhancer.setCallback(new CglibHandler()); ((AServiceImpl) enhancer.create()).fly(); } } \`\`\`