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JSP Action

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Jsp Action

In JSP is actions used a constructs in XML syntax to control and behaviour of the servlet engine. We can dynamically insert a file, reuse JavaBeans components, forward the user to another page, or generate HTML for the Java plugin.

There is only one syntax for the Action element, as it conforms to the XML standard:

Syntax used

<jsp:action_name attribute="value"/>

Some important Action tags

Syntax	Purpose
jsp:include	Includes a file at the time the page is requested
jsp:useBean	find javaBean
jsp:setProperty	Sets JavaBean property
jsp:getProperty	inserts the property of a JavaBean into the output
jsp:forward	Forwards the requester to a new page
jsp:plugin	A specific code which makes an OBJECT or EMBED tag of Javaplugin
jsp:element	Defines XML element

jsp:forward action tag

It can be used to forward the request to another resource it may be jsp.

Syntax used without parameter

    <jsp:forward page="relativeURL | <%= expression %>">  
    <jsp:param name="parametername" value="parametervalue | <%=expression%>" />  
    </jsp:forward>  

    <jsp:forward page="relativeURL | <%= expression %>">  
    <jsp:param name="parametername" value="parametervalue | <%=expression%>" />  
    </jsp:forward>

Example

index.jsp

    <html>  
    <body>  
    <h2>this is index page</h2>  
    <jsp:forward page="printdate.jsp" />  
    </body>  
    </html>  

    <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>  

    <html>  
    <body>  
    <% out.print("Today is:"+java.util.Calendar.getInstance().getTime()); %>  
    </body>  
    </html>