📄 rewriteservlet.java
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import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.lang.*;
public class RewriteServlet extends HttpServlet{
static final String COUNTER_KEY = "RewriteCounter.count";
public void doGet(HttpServletRequest req,HttpServletResponse resp)
throws ServletException, java.io.IOException{
resp.setContentType("text/html");
java.io.PrintWriter out = resp.getWriter();
HttpSession session = req.getSession(true);
//Is there a count yet?
int count =1;
Integer i = (Integer) session.getValue(COUNTER_KEY);
//If a previous count exists, set it
if(i!= null){
count = i.intValue() + 1;
}
//Put the count back into the session
session.putValue(COUNTER_KEY, new Integer(count));
//Print a standard header
out.println("<html><head><title>Session Counter with URL rewriting</title>");
out.println("</head><body>");
out.println("<br>session ID is <b>"+session.getId()+"</b>");
out.println("<br>you hit this page<b>"+count+"time(s)");
out.println("<br>resp.encodeUrl(url)=<b>"+resp.encodeUrl(url)+"</b>");
out.println("<form method=POST action="+resp.encodeUrl(url)+">");
out.println("<input type=submit value=\"Hit page again\">");
out.println("</form></body></html>");
}
public void doPost(HttpServletRequest req,HttpServletResponse resp)
throws ServletException, java.io.IOException{
doGet(req,resp);
}
}
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