Duplicated session varaibles

<jsp:useBean id="myBookBean"   class="com.java2s.Book"
             scope="session">
  <%-- The setProperty tag is only executed when a JavaBean is created --%>
  <jsp:setProperty name="myBookBean" property="author" value="Joe" />
</jsp:useBean>

<html>
  <head>
    <title>When a JavaBean already exists...</title>
  </head>
  <body>
    The author of your book is <jsp:getProperty name="myBookBean"
                                                property="author" /><P>

    Click <a href="beanAlreadyExists2.jsp">here</a> to see another page that
    declares a JavaBean that uses the same name and scope.
  </body>
</html>

//beanAlreadyExists2.jsp

<jsp:useBean id="myBookBean"   class="com.java2s.Book"
             scope="session" />

<html>
  <head>
    <title>When a JavaBean already exists...</title>
  </head>
  <body>
    This page redeclares the JavaBean, but does not set any of its properties.
    The same name and scope were used for the JavaBean, so the original bean
    is used.
    <P>
    The author of your book is <jsp:getProperty name="myBookBean"
                                                property="author" /><P>
  </body>
</html>

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Duplicated session varaibles : Session « JSP « Java

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