How do I get client IP and hostname in Servlet?

By Wayan in Servlet 0 Comment 
package org.kodejava.servlet;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

@WebServlet(name = "ClientAddressServlet", urlPatterns = "/client-ip")
public class ClientAddressServlet extends HttpServlet {

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        // Get client's IP address
        String clientIP = request.getRemoteAddr();

        // Get client's host name
        String clintHost = request.getRemoteHost();

        response.setContentType("text/plain");
        PrintWriter out = response.getWriter();
        out.println("IP  : " + clientIP);
        out.println("Host: " + clintHost);
    }

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        doPost(request, response);
    }
}

Maven dependencies

<!--https://search.maven.org/remotecontent?filepath=javax/servlet/javax.servlet-api/4.0.1/javax.servlet-api-4.0.1.jar-->
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>4.0.1</version>
</dependency>

Maven Central

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