If you enable the HTTP response compression functionality, the response body of the HTTP response is compressed in a gzip format. The following figure shows an overview of HTTP response compression functionality.

Figure 2-12 Overview of HTTP response compression functionality

To enable the HTTP response compression functionality, you need to embed the HTTP response compression filter provided by Application Server, in the Web application. In the case of applying the HTTP response compression functionality, add the filter definition of the HTTP response compression filter and the definition of the filter mapping to the DD (web.xml) of Web application. In the case of applying the HTTP response compression functionality to a Web application that is already deployed on a J2EE server, use the server management commands to add the filter definition of the HTTP response compression filter and the definition of filter mapping.