📄 iplogservlet.java
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package com.tarena.serv.app;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.util.Date;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class IpLogServlet extends HttpServlet {
private PrintWriter logger;
@Override
public void init() throws ServletException {
String filename = getInitParameter("filename");
try {
OutputStream fout = new FileOutputStream(filename, true);
logger = new PrintWriter(fout);
} catch (Exception e) {
e.printStackTrace();
throw new ServletException(e);
}
}
@Override
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
String ip = request.getRemoteAddr();
Date time = new Date();
synchronized (this) {
logger.print(time);
logger.print(" : ");
logger.println(ip);
logger.flush();
}
response.setContentType("text/html;charset=gbk");
PrintWriter out = response.getWriter();
out.println("<html>");
out.println("<head>");
out.println("<title>log</title>");
out.println("</head>");
out.println("<body bgcolor=\"yellow\">");
out
.println("<h3 align=\"center\">your ip has been logged on the server.</h3>");
out.println("</body>");
out.println("</html>");
out.close();
}
@Override
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
@Override
public void destroy() {
logger.close();
}
}
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