Learn jsp tags and programming | Under Java Training Course
Comments in JSP
Plain HTML Comments
Ex: <!-- hello -->
Response: <! -- hello -->
HTML Comments containing JSP tags
Ex: < !-- value of 10 + 20 is <%= 10 + 20 %> -->
Response: <! -- value of 10 + 20 is 30 -->
JSP Comment tag
Ex: <%-- This is a JSP comment -- %>
Response:
Java Comments
Ex: <% /* int x;
float f; */
void meth1()
{
//out.println( "hello output" );
} %>
JSP tag types
Declaration tags
• For variable and method declaration
•
• Format: <%! Variable declaration;
Method declaration;
%>
Expression tags
• For inserting Java expressions
•
• format: <%= expression %>
Scriptlets
• To embed java code blocks
• format: <% code block %>
Directives
• To specify information that affect
the whole JSP program
• format: <%@ directive_type
directive_attribute %>
Action tags
• Used to work with standard objects
format: <jsp:action_name action_attributes />