How to get client's address in a servlet

This is detailed java code to get client's address in a servlet. In this example we have used method getremoteAddr() of the ServletRequest interface which returns IP address of the client in the string format.

Syntax of the method : java.lang.String getRemoteAddr()

We have used a jsp page that is used to send a request to a servlet that execute the request and find the ID address of the client's request. Before run this code create a new directory named "user" in the tomcat-6.0.16/webapps and paste WEB-INF directory in same directory.

get_address.jsp

<%@page language="java" session="true" 
contentType="text/html;charset=ISO-8859-1" %> 
<b><font color="blue">Please Enter your Full Name here:</font></b><br>
<form name="frm" method="get" action="../user/GetAddress">
    <table border = "0">
        <tr align="left" valign="top">
            <td>First Name:</td>
            <td><input type="text" name ="name" /></td>
        </tr>
        <tr align="left" valign="top">
            <td></td>
            <td><input type="submit" name="submit" value="submit"/></td>
        </tr>
    </table>
</form>

Save this code as a .jsp file named "get_address.jsp" in the directory Tomcat-6.0.16/webapps/user/ and you can run this jsp page with following url in address bar of the browser "http://localhost:8080/user/get_address.jsp"

GetAddress.java

import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class GetAddress extends HttpServlet {
  public void doGet(HttpServletRequest request,
HttpServletResponse response)
    throws IOException, ServletException{
    response.setContentType("text/html");
    PrintWriter out = response.getWriter();    
    String name = request.getParameter("name");
	out.println("<h3>You have entered name : " + name + "<br>");	   
    out.println("<b><font color='blue'>
   IP Address of request : </font></b>"
	+request.getRemoteAddr()+"<h3>");
  }
}

Compile this java code and save .class file in directory C:\apache-tomcat-6.0.16\webapps\user\WEB-INF\classes.

web.xml

<servlet>
    <servlet-name>GetAddress</servlet-name>
    <servlet-class>GetAddress</servlet-class>
</servlet> 
<servlet-mapping>
    <servlet-name>GetAddress</servlet-name>
    <url-pattern>/GetAddress</url-pattern>
</servlet-mapping>

This is web .xml file use to map servlet. When run jsp page in the browser.....

User enters first name and click on submit button.......

Download Source Code

How to get client's address in a servlet

How to get client's address in a servlet

How to get client's address in a servlet

Tutorials