To separate the code from the presentation it would be good idea to encapsulate the code in java object instantiate it and use it in our jsp. This instance is variable is called ‘id’.
We can also specific life time of this object by using ‘scope’ attribute
<jsp:useBean id=’name’ scope=”scope” class=”beanclass”/>
Properties:
id: a case sensitive name is used.
Scope: The scope with in which the reference is available. page, request,session, application are possible values
page is default
class: the fully qualified classes name
bean name: The name of the java bean class
type: This type must be super class of the beans classes
</> MV Techbytes 
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