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What are Java Servlets?

  • Java Servlets are alternatives to CGI and NSAPI/ISAPI web server extensions

  • Java Servlets are compiled code, but are loaded dynamically

    • .java source file gets compiled to byte code .class file
  • Java Servlets are the core presentation-layer technology for J2EE

    • JavaServer Pages (JSP) are built on Java Servlet “plumbing”
    • Velocity template engine is a Java Servlet
    • XML/XSLT transformation engines are implemented as servlets
  • Compiled Java Servlets (.class) are fully portable across J2EE servers and servlet/JSP engines

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