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‎ServletInfo/pom.xml‎

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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>net.javatutorial.tutorials</groupId>
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<artifactId>ServletInfo</artifactId>
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<version>1</version>
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<packaging>war</packaging>
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<name>ServletInfo</name>
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<url>https://javatutorial.net</url>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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</properties>
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<dependencies>
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<dependency>
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<groupId>javax.servlet</groupId>
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<artifactId>javax.servlet-api</artifactId>
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<version>3.1.0</version>
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<scope>provided</scope>
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</dependency>
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</dependencies>
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<build>
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<sourceDirectory>src/main/java</sourceDirectory>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-war-plugin</artifactId>
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<version>2.3</version>
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<configuration>
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<warSourceDirectory>src/main/webapp</warSourceDirectory>
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</configuration>
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</plugin>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>3.1</version>
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<configuration>
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<source>1.8</source>
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<target>1.8</target>
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</configuration>
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</plugin>
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</plugins>
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</build>
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</project>

‎ServletInfo/src/main/java/net/javatutorial/tutorials/ServletInfo.java‎

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package net.javatutorial.tutorials;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.util.Enumeration;
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import java.util.Map;
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import javax.servlet.ServletException;
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import javax.servlet.http.Cookie;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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public class ServletInfo extends HttpServlet {
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private static final long serialVersionUID = -2383814320847175129L;
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@Override
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protected void doGet(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException {
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PrintWriter pr = response.getWriter();
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pr.println("=== Paths ===\n");
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pr.println("Request URL : " + request.getRequestURL());
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pr.println("Request URI : " + request.getRequestURI());
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pr.println("Servlet path : " + request.getServletPath());
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pr.println("\n=== Headers ===\n");
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Enumeration<String> e = request.getHeaderNames();
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while(e.hasMoreElements()){
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String param = (String) e.nextElement();
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pr.println(param + " : " + request.getHeader(param));
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}
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pr.println("\n=== Parameters ===\n");
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Map<String, String[]> paramsMap = request.getParameterMap();
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for (String key : paramsMap.keySet()) {
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pr.println(key + " : " + request.getParameter(key));
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}
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pr.println("\n=== Session ===\n");
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// returns 0:0:0:0:0:0:0:1 if executed from localhost
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pr.println("Client IP address : " + request.getRemoteAddr());
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pr.println("Session ID : " + request.getRequestedSessionId());
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// Cookie objects the client sent with this request
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Cookie[] cookies = request.getCookies();
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if (cookies != null) {
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for (Cookie cookie : cookies) {
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pr.print(cookie.getName() + ";");
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}
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}
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}
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}

‎ServletInfo/src/main/webapp/WEB-INF/web.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
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version="3.1">
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<display-name>Servlet Information Application</display-name>
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<servlet>
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<servlet-name>servletInfo</servlet-name>
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<servlet-class>net.javatutorial.tutorials.ServletInfo</servlet-class>
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<load-on-startup>1</load-on-startup>
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</servlet>
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<servlet-mapping>
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<servlet-name>servletInfo</servlet-name>
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<url-pattern>/info</url-pattern>
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</servlet-mapping>
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</web-app>

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