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POAre Java EE Servlets actually used directly?
 

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    <p>I'm just trying to get started with Java EE and related concepts. However, I'm having some trouble understanding the relations between some technologies and the roles they play.</p> <p>As far as I understand, a Java EE Servlet is a Java class that runs inside a server, and generates responses to requests (typically HTML responses to HTTP requests, though Servlets can theoretically serve any protocol).</p> <p>My questions:</p> <ul> <li>As far as I understand, I can either write a Servlet class directly, or I can use some technology like JSP or JSF, which will then generate/provide a Servlet for me. At any rate, the Java EE web container (e.g. Apache Tomcat) where I ultimately run my app will only see Servlets, and will not care how they were created (so Servlets are kind of a low level plumbing). Is that true?</li> <li>If Servlets are kind of low-level, is there any reason to actually use Servlets directly? I have seen many tutorials that explain how to write a Servlet, but that seems rather unpractical. Is there any situation where writing a Servlet directly is better/preferred to using JSP or similar?</li> <li>Finally, Servlets need a server to run in (e.g. Apache Tomcat). When reading about servers in that context, I've seen various names such as <em>(Java EE) web container</em>, or <em>servlet container</em>, or <em>JSP container</em>, or just <em>Java EE server</em>. Do these terms all mean the same, or is there a difference?</li> </ul> <p>Thanks for helping me get started!</p>
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