1. CS320 Web and Internet Programming JSP Standard Tag Library (JSTL) Chengyu Sun California State University, Los Angeles

2. Simple JSTL Example JSTL Hello

3. taglib Directive URI A unique identifier for the tag library NOT a real URL Prefix A short name for the tag library Could be an arbitrary name

4. JSP Standard Tag Library (JSTL) LibraryURIPrefix Corehttp://java.sun.com/jsp/jstl/corec XML Processinghttp://java.sun.com/jsp/jstl/xmlx I18N Formattinghttp://java.sun.com/jsp/jstl/fmtfmt Database Accesshttp://java.sun.com/jsp/jstl/sqlsql Functionshttp://java.sun.com/jsp/jstl/functionsfn http://java.sun.com/products/jsp/jstl/1.1/docs/tlddocs/index.html

5. JSTL Core Flow control  Variable support URL  Output Exception handling

6. JSTL Usage Examples ShoppingCart.jsp Login.jsp and Members.jsp

7. Branch Tags The cart is empty. The cart is emtpy.

8. Loop Tags ${i} ${cart.items[i]}  Exercise

9. Set and Remove Scope Variables In Login.jsp In CheckLogin.jsp In Logout.jsp

10. Set Bean Property name attribute must be a bean declared by target attribute can be any object with a setter Example:

11. URL Tags <x:parsedoc=“${something}” var=“booklist” scope=“application” /> Get book

12. Output You want to use if escapeXML=true value is a Java.io.Reader object ${100} ${price}

13. Character Conversion When escapeXML=true << >> && ‘' “"

14. Exception Handling see Error Page and Exception Handing

15. JSTL Functions fn:length() fn:contains() fn:containsIgnoreCase() fn:startWith() fn:endsWith() fn:indexOf() fn:replace() fn:trim() fn:toUpperCase() fn:toLowerCase() fn:substring() fn:substringAfter() fn:substringBefore() fn:split() fn:join() fn:escapeXML()

16. Function Example Exercise