//运行时会报错的原代码:
ClassPool pool = ClassPool.getDefault();
CtClass cc = pool.get(Emp.class.getName());
//更改后可以运行不报错的代码:
ClassPool pool = ClassPool.getDefault();
pool.insertClassPath(new ClassClassPath(Emp.class));
CtClass cc = pool.get(Emp.class.getName());