BE THE CODER > Tools and Libs > Commons Http Client > HTTP POST Request with Multipart Entity Body

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 with Multipart Entity body.

File Name :	com/bethecoder/tutorials/commons_httpclient/SimplePostRequestTest3.java
Author :	Sudhakar KV
Email :	[email protected]


package com.bethecoder.tutorials.commons_httpclient;



import java.io.File;

import java.io.IOException;

import java.io.UnsupportedEncodingException;



import org.apache.http.client.ClientProtocolException;

import org.apache.http.client.HttpClient;

import org.apache.http.client.ResponseHandler;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.entity.mime.MultipartEntity;

import org.apache.http.entity.mime.content.FileBody;

import org.apache.http.entity.mime.content.StringBody;

import org.apache.http.impl.client.BasicResponseHandler;

import org.apache.http.impl.client.DefaultHttpClient;



public class SimplePostRequestTest3 {



  /**

   * @param args

   */

  public static void main(String[] args) {

    HttpClient httpclient = new DefaultHttpClient();

    HttpPost httppost = new HttpPost("http://localhost:8080/HTTP_TEST_APP/index.jsp");



    try {

      FileBody bin = new FileBody(new File("C:/ABC.txt"));

      StringBody comment = new StringBody("BETHECODER HttpClient Tutorials");



      MultipartEntity reqEntity = new MultipartEntity();

      reqEntity.addPart("fileup0", bin);

      reqEntity.addPart("fileup1", comment);

      

      reqEntity.addPart("ONE", new StringBody("11111111"));

      reqEntity.addPart("TWO", new StringBody("222222222"));

      httppost.setEntity(reqEntity);



      System.out.println("Requesting : " + httppost.getRequestLine());

      ResponseHandler<String> responseHandler = new BasicResponseHandler();

      String responseBody = httpclient.execute(httppost, responseHandler);



      System.out.println("responseBody : " + responseBody);



    } 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.