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Java Servlet API 4.0.1 Source Code Files
Java Servlet API 4.0.1 Source Code Files are important if you want to compile them with different JDK releases.
You can get Java Servlet API 4.0.1 Source Code Files from Servlet API Maven Website in the "4.0.1/" folder.
You can also browse Java Servlet API 4.0.1 Source Code files below:
✍: FYIcenter.com
⏎ javax/servlet/GenericServlet.java
/* * Copyright (c) 1997-2018 Oracle and/or its affiliates. All rights reserved. * Copyright 2004 The Apache Software Foundation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package javax.servlet; import java.io.IOException; import java.util.Enumeration; import java.util.ResourceBundle; /** * * Defines a generic, protocol-independent * servlet. To write an HTTP servlet for use on the * Web, extend {@link javax.servlet.http.HttpServlet} instead. * * <p><code>GenericServlet</code> implements the <code>Servlet</code> * and <code>ServletConfig</code> interfaces. <code>GenericServlet</code> * may be directly extended by a servlet, although it's more common to extend * a protocol-specific subclass such as <code>HttpServlet</code>. * * <p><code>GenericServlet</code> makes writing servlets * easier. It provides simple versions of the lifecycle methods * <code>init</code> and <code>destroy</code> and of the methods * in the <code>ServletConfig</code> interface. <code>GenericServlet</code> * also implements the <code>log</code> method, declared in the * <code>ServletContext</code> interface. * * <p>To write a generic servlet, you need only * override the abstract <code>service</code> method. * * * @author Various */ public abstract class GenericServlet implements Servlet, ServletConfig, java.io.Serializable { private static final String LSTRING_FILE = "javax.servlet.LocalStrings"; private static ResourceBundle lStrings = ResourceBundle.getBundle(LSTRING_FILE); private transient ServletConfig config; /** * * Does nothing. All of the servlet initialization * is done by one of the <code>init</code> methods. * */ public GenericServlet() { } /** * Called by the servlet container to indicate to a servlet that the * servlet is being taken out of service. See {@link Servlet#destroy}. * * */ public void destroy() { } /** * 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 * */ public String getInitParameter(String name) { ServletConfig sc = getServletConfig(); if (sc == null) { throw new IllegalStateException( lStrings.getString("err.servlet_config_not_initialized")); } return sc.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 */ public Enumeration<String> getInitParameterNames() { ServletConfig sc = getServletConfig(); if (sc == null) { throw new IllegalStateException( lStrings.getString("err.servlet_config_not_initialized")); } return sc.getInitParameterNames(); } /** * Returns this servlet's {@link ServletConfig} object. * * @return ServletConfig the <code>ServletConfig</code> object * that initialized this servlet */ public ServletConfig getServletConfig() { return config; } /** * Returns a reference to the {@link ServletContext} in which this servlet * is running. See {@link ServletConfig#getServletContext}. * * <p>This method is supplied for convenience. It gets the * context from the servlet's <code>ServletConfig</code> object. * * * @return ServletContext the <code>ServletContext</code> object * passed to this servlet by the <code>init</code> * method */ public ServletContext getServletContext() { ServletConfig sc = getServletConfig(); if (sc == null) { throw new IllegalStateException( lStrings.getString("err.servlet_config_not_initialized")); } return sc.getServletContext(); } /** * Returns information about the servlet, such as * author, version, and copyright. * By default, this method returns an empty string. Override this method * to have it return a meaningful value. See {@link * Servlet#getServletInfo}. * * * @return String information about this servlet, by default an * empty string */ public String getServletInfo() { return ""; } /** * Called by the servlet container to indicate to a servlet that the * servlet is being placed into service. See {@link Servlet#init}. * * <p>This implementation stores the {@link ServletConfig} * object it receives from the servlet container for later use. * When overriding this form of the method, call * <code>super.init(config)</code>. * * @param config the <code>ServletConfig</code> object * that contains configuration * information for this servlet * * @exception ServletException if an exception occurs that * interrupts the servlet's normal * operation * * @see UnavailableException */ public void init(ServletConfig config) throws ServletException { this.config = config; this.init(); } /** * A convenience method which can be overridden so that there's no need * to call <code>super.init(config)</code>. * * <p>Instead of overriding {@link #init(ServletConfig)}, simply override * this method and it will be called by * <code>GenericServlet.init(ServletConfig config)</code>. * The <code>ServletConfig</code> object can still be retrieved via {@link * #getServletConfig}. * * @exception ServletException if an exception occurs that * interrupts the servlet's * normal operation */ public void init() throws ServletException { } /** * Writes the specified message to a servlet log file, prepended by the * servlet's name. See {@link ServletContext#log(String)}. * * @param msg a <code>String</code> specifying * the message to be written to the log file */ public void log(String msg) { getServletContext().log(getServletName() + ": "+ msg); } /** * Writes an explanatory message and a stack trace * for a given <code>Throwable</code> exception * to the servlet log file, prepended by the servlet's name. * See {@link ServletContext#log(String, Throwable)}. * * * @param message a <code>String</code> that describes * the error or exception * * @param t the <code>java.lang.Throwable</code> error * or exception */ public void log(String message, Throwable t) { getServletContext().log(getServletName() + ": " + message, t); } /** * Called by the servlet container to allow the servlet to respond to * a request. See {@link Servlet#service}. * * <p>This method is declared abstract so subclasses, such as * <code>HttpServlet</code>, must override it. * * @param req the <code>ServletRequest</code> object * that contains the client's request * * @param res the <code>ServletResponse</code> object * that will contain the servlet's response * * @exception ServletException if an exception occurs that * interferes with the servlet's * normal operation occurred * * @exception IOException if an input or output * exception occurs */ public abstract void service(ServletRequest req, ServletResponse res) throws ServletException, IOException; /** * Returns the name of this servlet instance. * See {@link ServletConfig#getServletName}. * * @return the name of this servlet instance */ public String getServletName() { ServletConfig sc = getServletConfig(); if (sc == null) { throw new IllegalStateException( lStrings.getString("err.servlet_config_not_initialized")); } return sc.getServletName(); } }
⏎ javax/servlet/GenericServlet.java
Or download all of them as a single archive file:
File name: javax.servlet-api-4.0.1-sources.jar File size: 203006 bytes Release date: 2018-04-20 Download
⇒ Download javax.servlet-api-3.0.1.jar
⇐ Download javax.servlet-api-4.0.1.jar
2022-12-23, 5844👍, 0💬
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