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Servlets :
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must import the java.servlet package
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must extend the GenericServlet class or HttpServlet class if implementing http features
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must override the service method in the class
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eg Hello World Servlet:
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import java.io.*;
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import java.servlet.*;
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public class HelloWorldServlet extends GenericServlet {
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public void service(ServletRequest req, ServletResponse res)
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throws ServletException, IOException{
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PrintStream out = newPrintStream(res.getOutputStream());
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out.println("Hello world!");}
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public String getServletInfo() {
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return "Hello World Servlet"; }
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}
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