📄 clientaccesscounts.java
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package coreservlets;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
/** Servlet that prints per-client access counts.
* <P>
* Taken from Core Servlets and JavaServer Pages 2nd Edition
* from Prentice Hall and Sun Microsystems Press,
* http://www.coreservlets.com/.
* © 2003 Marty Hall; may be freely used or adapted.
*/
public class ClientAccessCounts extends HttpServlet {
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
String countString =
CookieUtilities.getCookieValue(request,
"accessCount",
"1");
int count = 1;
try {
count = Integer.parseInt(countString);
} catch(NumberFormatException nfe) { }
LongLivedCookie c =
new LongLivedCookie("accessCount",
String.valueOf(count+1));
response.addCookie(c);
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String title = "Access Count Servlet";
String docType =
"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 " +
"Transitional//EN\">\n";
out.println(docType +
"<HTML>\n" +
"<HEAD><TITLE>" + title + "</TITLE></HEAD>\n" +
"<BODY BGCOLOR=\"#FDF5E6\">\n" +
"<CENTER>\n" +
"<H1>" + title + "</H1>\n" +
"<H2>This is visit number " +
count + " by this browser.</H2>\n" +
"</CENTER></BODY></HTML>");
}
}
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