your question does not make a lot of sense. Beans are like any java Object: you can access the methods with the proper declaration. So, I suspect that you want to write a method on, say bean A, that accesses the instance of bean B that was created in the JSP. Why don't you just switch the method declarations so that the signature takes an instance of bean B? Like,
BeanA a = new BeanA();
BeanB b = new BeanB();
a.accessOtherBean(b);
b.accessOtherBean(a);