jsp: useBean.. and c: coding

Question

I am trying to understand this coding.
1. What does the <jsp: useBean .. class="coreservlets.ShoppingCart"> mean? Are we bringing in the content of the ShoppingCart class?
If we use <% import="coreserlets.*"> at the top of JSP, wouldn't this work to apply all the class in the application?
2.What is the <c:> coding? I have never seen this before (I am pretty new with Java). Is this new version of Java?
Thanks.
Here is coding sample.
<jsp:useBean id="cart" class="coreservlets.ShoppingCart" scope="session"/>
<c:choose>
  <c:when test="${empty cart.itemsOrdered}">
    <h2><i>No items in your cart...</i></h2>
  </c:when>
  <c:otherwise>
    <table border=1 align="center">
    <tr bgcolor="#FFAD00">
      <th>Item ID</th>
      <th>Description</th>
      <th>Unit Cost</th>
      <th>Number</th>
      <th>Total Cost</th>
    </tr>
    <c:forEach var="item" items="${cart.itemsOrdered}">
       <tr>
         <td><c:out value="${item.itemID}"/></td>
         <td><c:out value="${item.shortDescription}"/></td>
         <td><fmt:formatNumber value="${item.unitCost}" type="currency"/>        
       </tr>
    </c:forEach>
    </table>
  </c:otherwise>
</c:choose>

Answer 1

I am trying to understand this coding.
1. What does the <jsp: useBean ..
class="coreservlets.ShoppingCart"> mean? Are we
bringing in the content of the ShoppingCart class?You're telling the JVM that you're going to use an instance of that class.
>
If we use <% import="coreserlets.*"> at the top of
JSP, wouldn't this work to apply all the class in the
application?No, that's not what import does.
2.What is the <c:> coding? I have never seen this
before (I am pretty new with Java). Is this new
version of Java?It's the JSP Standard Tag Library, or JSTL. It has core tags <c>, xml tags <xml>, formatting tags <format>, and SQL tags <sql>
<jsp:useBean id="cart"
class="coreservlets.ShoppingCart" scope="session"/>Looks like there's a ShoppingCart object in session scope.
>
Check to see if the shopping cart has items.
c:choose>If no items, say so.
>
<c:when test="${empty cart.itemsOrdered}">
<h2><i>No items in your cart...</i></h2>
/c:when>If there are items, display them in a table.
>
<c:otherwise>
<table border=1 align="center">
<tr bgcolor="#FFAD00">
<th>Item ID</th>
<th>Description</th>
<th>Unit Cost</th>
<th>Number</th>
<th>Total Cost</th>
/tr>
<c:forEach var="item"
items="${cart.itemsOrdered}">
<tr>
<td><c:out value="${item.itemID}"/></td>
<td><c:out
value="${item.shortDescription}"/></td>
<td><fmt:formatNumber
value="${item.unitCost}" type="currency"/>
</tr>
c:forEach>
</table>
c:otherwise>
</c:choose>
If you're new to Java, best to learn the base language before tackling JSPs.
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