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DOCUMENTATION: Jetty 6 - this wiki. Jetty 7 - at Eclipse. Jetty8 - at Eclipse. Jetty 9 - at Eclipse.
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JSP 2.0 vs JSP 2.1
Jetty does not implement JSP directly. Instead it uses a servlet to provide this functionality required by the servle specification. As part of Java EE 5 (the next version of J2EE), the companion of 2.5 servlet specification is the 2.1 JSP specification.
While all Java EE 5 technologies formally depend on java 5 (jre 1.5), this is a soft dependency for servlets and Jetty 6 will compile and run on jre 1.4. However, for JSP the dependency of java 5 is a hard dependency and jre 1.5 must be used to run the server with JSP 2.1
Thus Jetty 6 supports both JSP 2.0 and JSP 2.1 so that jre 1.4 users may be supported.
JSP 2.1 (Jesper)
JSP 2.0 (Jasper)
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