Write a servlet program to implement Hit Counter.
- Hit Counter Servlet
import java.io.*;
import javax.servlet.http.*;
public class HitCounter extends HttpServlet {
private int hitCounter;
public void init() {
hitCounter = 0;
}
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) {
hitCounter++;
response.setContentType("text/html;charset=UTF-8");
try (PrintWriter out = response.getWriter()) {
out.println("<!DOCTYPE html>");
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet HitCounter</title>");
out.println("</head>");
out.println("<body>");
out.print(
"<h1 align = \"center\">" + "Total Number of Hits" + "</h1>\n" +
"<h2 align = \"center\">" + hitCounter + "</h2>\n"
);
out.println("</body>");
out.println("</html>");
}
catch (Exception ex) {
ex.printStackTrace();
}
}}
- Web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.1" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd">
<servlet>
<servlet-name>HitCounter</servlet-name>
<servlet-class>HitCounter</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>HitCounter</servlet-name>
<url-pattern>/HitCounter</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>
30
</session-timeout>
</session-config></web-app>
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