public class SqlService {
public void executeSql1() throws InterruptedException {
System.out.println("Sql 开始执行.....");
Thread.sleep(1000);
System.out.println("Sql 执行结束.....");
}
}

public class SqlFacadeCglib implements MethodInterceptor {

/**
* 被代理的对象
*/
private Object target;

public SqlFacadeCglib(Object target) {
this.target = target;
}

/**
* 实现回调方法
* @param obj 代理的对象
* @param method 被代理对象的方法
* @param args 参数集合
* @param proxy 生成的代理类的方法
* @return
* @throws Throwable
*/
@Override
public Object intercept(Object obj, Method method, Object[] args, MethodProxy proxy) throws Throwable {
// 开始执行时间
Long startTime = System.currentTimeMillis();
// //调用业务类（父类中）的方法
Object result = proxy.invokeSuper(obj, args);
// 执行结束
Long endTime = System.currentTimeMillis();
System.out.println(target.getClass().getName()+"执行executeSql耗时"+(endTime-startTime)+"ms");
return result;
}
}

public class Test {

public static void main(String[] args) throws InterruptedException, IOException {
// 将class 文件保存
System.setProperty(DebuggingClassWriter.DEBUG_LOCATION_PROPERTY, "F:/mycode/Git/spring-mvc/learn/design-pattern-learn/src/main/java/com/lot/cglibproxy");
SqlService sqlService = new SqlService();
SqlFacadeCglib sqlFacadeCglib = new SqlFacadeCglib(sqlService);

//创建加强器，用来创建动态代理类
Enhancer enhancer = new Enhancer();
//为加强器指定要代理的业务类（即：为下面生成的代理类指定父类）
enhancer.setSuperclass(sqlService.getClass());

//设置回调：对于代理类上所有方法的调用，都会调用CallBack，而Callback则需要实现intercept()方法进行拦
enhancer.setCallback(sqlFacadeCglib);
// 创建动态代理类对象并返回
SqlService sqlServiceProxy = (SqlService)enhancer.create();
// 调用
sqlServiceProxy.executeSql1();

}
}

CGLIB debugging enabled, writing to 'F:/mycode/Git/spring-mvc/learn/design-pattern-learn/src/main/java/com/lot/cglibproxy'
Sql 开始执行.....
Sql 执行结束.....
com.lot.cglibproxy.SqlService执行executeSql耗时1018ms

根据Debug的显示 结合 System.setProperty() 写入文件的位置，我们找到 生成的代理类：SqlService￥￥EnhancerByCGLIB￥￥ecb184ce : (简略后代码) ：
public class SqlService$$EnhancerByCGLIB$$ecb184ce extends SqlService implements Factory {

static void CGLIB$STATICHOOK1() {
CGLIB$THREAD_CALLBACKS = new ThreadLocal();
// 参数集合
CGLIB$emptyArgs = new Object[0];
Class var0 = Class.forName("com.lot.cglibproxy.SqlService$$EnhancerByCGLIB$$ecb184ce");
Class var1;
Method[] var10000 = ReflectUtils.findMethods(new String[]{"equals", "(Ljava/lang/Object;)Z", "toString", "()Ljava/lang/String;", "hashCode", "()I", "clone", "()Ljava/lang/Object;"}, (var1 = Class.forName("java.lang.Object")).getDeclaredMethods());
CGLIB$equals$1$Method = var10000[0];
CGLIB$equals$1$Proxy = MethodProxy.create(var1, var0, "(Ljava/lang/Object;)Z", "equals", "CGLIB$equals$1");
CGLIB$toString$2$Method = var10000[1];
CGLIB$toString$2$Proxy = MethodProxy.create(var1, var0, "()Ljava/lang/String;", "toString", "CGLIB$toString$2");
CGLIB$hashCode$3$Method = var10000[2];
CGLIB$hashCode$3$Proxy = MethodProxy.create(var1, var0, "()I", "hashCode", "CGLIB$hashCode$3");
CGLIB$clone$4$Method = var10000[3];
CGLIB$clone$4$Proxy = MethodProxy.create(var1, var0, "()Ljava/lang/Object;", "clone", "CGLIB$clone$4");
// 被代理类的 executeSql1() 方法
CGLIB$executeSql1$0$Method = ReflectUtils.findMethods(new String[]{"executeSql1", "()V"}, (var1 = Class.forName("com.lot.cglibproxy.SqlService")).getDeclaredMethods())[0];
// 生成代理类的 executeSql1() 方法
CGLIB$executeSql1$0$Proxy = MethodProxy.create(var1, var0, "()V", "executeSql1", "CGLIB$executeSql1$0");
}
public final void executeSql1() throws InterruptedException {
MethodInterceptor var10000 = this.CGLIB$CALLBACK_0;
if (this.CGLIB$CALLBACK_0 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_0;
}

if (var10000 != null) {
// 执行 SqlFacadeCglib.intercept() 方法
var10000.intercept(this, CGLIB$executeSql1$0$Method, CGLIB$emptyArgs, CGLIB$executeSql1$0$Proxy);
} else {
super.executeSql1();
}
}