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 Tools and Libs > Commons Http Client > Simple HTTP POST Request

Simple HTTP POST Request 

Commons Http Client is a HTTP agent implementation in java supporting client-side authentication, HTTP state management and HTTP connection management. This requires the libraries httpclient-4.1.2.jar, httpcore-4.1.2.jar, httpmime-4.1.2.jar, httpclient-cache-4.1.2.jar, commons-codec.jar and commons-logging-1.1.1.jar to be in classpath. The following example shows how to make Http Post request through Http Client.

File Name  :  
com/bethecoder/tutorials/commons_httpclient/SimplePostRequestTest.java 
Author  :  Sudhakar KV
Email  :  kvenkatasudhakar@gmail.com
   
package com.bethecoder.tutorials.commons_httpclient;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;

public class SimplePostRequestTest {

  /**
   @param args
   */
  public static void main(String[] args) {
    HttpClient httpclient = new DefaultHttpClient();
    HttpPost httppost = new HttpPost("http://localhost:8080/HTTP_TEST_APP/postreq.jsp");
    System.out.println("Requesting : " + httppost.getURI());

    try {
      List <NameValuePair> nvps = new ArrayList <NameValuePair>();
      nvps.add(new BasicNameValuePair("user""venakta sudhakar"));
      nvps.add(new BasicNameValuePair("password""abcd1234"));

      httppost.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8));

      HttpResponse response = httpclient.execute(httppost);
      System.out.println("\n\nResponse : ");
      if (response.getEntity() != null) {
        System.out.println(EntityUtils.toString(response.getEntity()));
      }

    catch (UnsupportedEncodingException e) {
      e.printStackTrace();
    catch (ClientProtocolException e) {
      e.printStackTrace();
    catch (IOException e) {
      e.printStackTrace();
    finally {
      httpclient.getConnectionManager().shutdown();
    }
  }

}
   

A simple Web Application which prints the request headers, parameters and body through JSP.

File Name  :  
/HTTP_TEST_APP/WebContent/postreq.jsp 

It gives the following output,
File Name  :  OUTPUT


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