Workshop
The Workshop is designed to help you review what you have learned, and help you to further increase your understanding of the material covered in this hour.
Quiz
| 1: | What steps do you need to take before you can use JSTL in a JSP? | | 2: | What JSTL tag would you use to write the value of a variable? | | 3: | How do you find the length of a collection or a string? |
Answers | | | A1:
| Copy the JSTL JAR file(s) to your WEB-INF/lib directory, then add a <taglib> declaration to your web.xml file. Finally, add a <% taglib %> declaration to the top of your JSP. | | | | A2:
| The <c:out> tag writes out the value of a variable and can also display a default value if the variable is null. | | | | A3:
| The JSTL functions library provides a number of utility functions, including fn:length, which returns the length of a string or a collection. |
Activities
Create a JSP that uses the <c:set> tag to store several variables in the current request (use "request" as the scope name), and then forwards to a second JSP. In the second JSP, use the <c:out> tag to display the variables you stored. Create a JSP that uses <c:forEach> and <c:out> to display the request header variables. Use the implicit header and headerValues objects to enumerate through the header names and their values.
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