Class GenericServlet

java/jakarta/servlet/GenericServlet.java:38–205

Defines a generic, protocol-independent servlet. To write an HTTP servlet for use on the Web, extend jakarta.servlet.http.HttpServlet instead. GenericServlet implements the Servlet and ServletConfig interfaces. GenericServlet may be dir

 * To write a generic servlet, you need only override the abstract <code>service</code> method.
 */
public abstract class GenericServlet implements Servlet, ServletConfig, java.io.Serializable {

    @Serial
    private static final long serialVersionUID = 1L;

    private transient ServletConfig config;

    /**
     * Does nothing. All of the servlet initialization is done by one of the <code>init</code> methods.
     */
    public GenericServlet() {
        // NOOP
    }

    /**
     * Called by the servlet container to indicate to a servlet that the servlet is being taken out of service. See
     * {@link Servlet#destroy}.
     */
    @Override
    public void destroy() {
        // NOOP by default
    }

    /**
     * Returns a <code>String</code> containing the value of the named initialization parameter, or <code>null</code> if
     * the parameter does not exist. See {@link ServletConfig#getInitParameter}.
     * <p>
     * This method is supplied for convenience. It gets the value of the named parameter from the servlet's
     * <code>ServletConfig</code> object.
     *
     * @param name a <code>String</code> specifying the name of the initialization parameter
     *
     * @return String a <code>String</code> containing the value of the initialization parameter
     */
    @Override
    public String getInitParameter(String name) {
        return getServletConfig().getInitParameter(name);
    }

    /**
     * Returns the names of the servlet's initialization parameters as an <code>Enumeration</code> of
     * <code>String</code> objects, or an empty <code>Enumeration</code> if the servlet has no initialization
     * parameters. See {@link ServletConfig#getInitParameterNames}.
     * <p>
     * This method is supplied for convenience. It gets the parameter names from the servlet's
     * <code>ServletConfig</code> object.
     *
     * @return Enumeration an enumeration of <code>String</code> objects containing the names of the servlet's
     *             initialization parameters
     */
    @Override
    public Enumeration<String> getInitParameterNames() {
        return getServletConfig().getInitParameterNames();
    }

    /**
     * Returns this servlet's {@link ServletConfig} object.
     *