JSP Action Tags:
There are many JSP action tags or elements. Each JSP action tag is used to
perform some specific tasks.
The action tags are used to control the flow between pages and to use Java Bean.
The Jsp action tags are given below.
| JSP Action Tags | Description |
| jsp:forward | forwards the request and response to another resource. |
| jsp:useBean | creates or locates bean object. |
| jsp:include | includes another resource. |
| jsp:setProperty | sets the value of property in bean object. |
| jsp:getProperty | prints the value of property of the bean. |
| jsp:plugin | embeds another components such as applet. |
| jsp:param | sets the parameter value. It is used in forward and include mostly. |
| jsp:fallback | can be used to print the message if plugin is working. It is used in jsp:plugin. |
note:The jsp:useBean, jsp:setProperty and jsp:getProperty tags are used for bean
development. So we will see these tags in bean developement.Here we select only
important JSP action tags.
jsp:forward action tag:
The jsp:forward action tag is used to forward the request to another resource it
may be jsp, html or another resource.
Syntax of jsp:forward action tag without parameter
|
<jsp:forward page="relativeURL | <%= expression %>" /> Syntax of jsp:forward action tag with parameter <jsp:forward page="relativeURL | <%= expression %>"> <jsp:param name="parametername" value="parametervalue | <%=expression%>" /> </jsp:forward> |
Example: jsp:forward action tag without parameter
In this example, we are simply forwarding the request to the printdate.jsp file.
index.jsp
|
<html> <body> <h2>this is index page</h2> <jsp:forward page="printdate.jsp" /> </body> </html> printdate.jsp <html> <body> <% out.print("Today is:"+java.util.Calendar.getInstance().getTime()); %> </body> </html> |
Example: jsp:forward action tag with parameter
In this example, we are forwarding the request to the printdate.jsp file with
parameter and printdate.jsp file prints the parameter value with date and time.
index.jsp
|
<html> <body> <h2>this is index page</h2> <jsp:forward page="printdate.jsp" > <jsp:param name="name" value="ycd.com" /> </jsp:forward> </body> </html> printdate.jsp <html> <body> <% out.print("Today is:"+java.util.Calendar.getInstance().getTime()); %> <%= request.getParameter("name") %> </body> </html>
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