Recipe 18.5 Automatically Refreshing a JSP


Problem

You want to refresh a JSP request at a specified interval.

Solution

Use a JSP scriptlet that adds a Refresh response header to the response.

Discussion

The following scriptlet code adds a Refresh header that specifies a 60-second interval for refreshing the JSP. Place this code at the top of the JSP before any content appears:

 <% response.addHeader("Refresh","60"); %> 

If you want to refresh the JSP to another web component or page, use this syntax:

 <% response.addHeader("Refresh","10;   http://localhost:8080/home/thanks.jsp"); %> 

See Also

Example 18-6 in Recipe 18.4 on refreshing a servlet; Example 18-7 in Recipe 18.4 on limiting the number of automatic refreshes of a servlet; Recipe 18.1 and Recipe 18.2 on examining request headers in a servlet and a JSP, respectively; Recipe 18.3 on using a filter to wrap the request and forward it along the filter chain; Recipe 18.6 on using a listener to track requests .



Java Servlet & JSP Cookbook
Java Servlet & JSP Cookbook
ISBN: 0596005725
EAN: 2147483647
Year: 2004
Pages: 326

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