basicservlet.java

来自「JAVA Servlet2.3外文书籍源码」· Java 代码 · 共 80 行

JAVA
80 行
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package basicServlets;

import javax.servlet.GenericServlet;
import javax.servlet.ServletConfig;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.ServletException;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Date;

/**
 * Title:        Professional Java Servlet Programming - Chapter 2
 * Description:  Basic servlet to demonstrate extending from GenericServlet
 * Copyright:    Copyright (c) 2001
 * @author Andrew Harbourne-Thomas
 * @version 1.0
 */
public class BasicServlet extends GenericServlet {
  private static int count = 0;
  private static final Date initialDate = new Date();
  private Date thisDate;

  /**
   * Initialize global variables, special resources such as Database
   * connections etc.
   */
  public void init(ServletConfig config) throws ServletException {
    super.init(config);
    thisDate = new Date();
    //System.out.println("BasicServlet initialized at:" + thisDate);
    log("BasicServlet initialized at:" + thisDate);
  }

  /**
   * Here we simply output a very simple HTML page
   *
   * @param request The object containing the client request
   * @param response The object used to send the response back
   */
  public void service(ServletRequest request, ServletResponse response)
    throws ServletException, IOException {
    response.setContentType("text/html");
    //access the PrintWriter object of the response object
    //to respond the request
    PrintWriter out = response.getWriter();

    //Simple HTML page
    out.println("<html><head><title>BasicServlet</title></head>");
    out.println("<body><h2>" + getServletName() + "</h2>");
    out.println("This is a basic servlet.<br>");
    out.println("<table><tr>");
    out.println("<tr><td><b>BasicServlet executed:</b></td><td>" +
                  (++count) + " time(s)</td></tr>");
    out.println("<tr><td><b>BasicServlet initialized at:</b></td><td>" +
                  initialDate + "</td></tr>");
    out.println("<tr><td><b>This instance initialized at:</b></td><td>" +
                  thisDate + "</td></tr>");
    out.println("<tr><td><b>Current Time:</b></td><td>" +
                  new Date() + "</td></tr>");
    out.println("<tr><td><b>Servlet Information:</b></td><td>" +
                  getServletInfo() + "</td></tr></body></html>");
    out.close();
  }

  /**
   * Overridden to give Servlet information
   */
  public String getServletInfo() {
    return "basicServlets.BasicServlet; Version: 1.0; (C) 2002.";
  }

  /**
   * Clean up resources
   */
  public void destroy() {
    //System.out.println("BasicServlet: destroy method called");
    log("destroy method called");
  }
}

basicservlet.java - 源码说明

本页面展示了「JAVA Servlet2.3外文书籍源码」中的 basicservlet.java 源码文件，采用 Java 编程语言编写，共 80 行代码。您可以在线阅读完整代码内容，也可以返回资源详情页下载完整源码包进行本地学习和开发。

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