HTTP Post Request using Apache Commons

Demonstrates an HTTP Post using the Apache Commons HTTP library.

Required Libraries:

• httpcore-4.1.jar
• commons-io-2.4.jar
• commons-logging-1.1.1.jar
• httpmime-4.1.1.jar
• httpclient-4.1.1.jar

Example Source Code

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

import org.apache.commons.io.IOUtils;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
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;

public class ExampleHttpPost
{
  public static void main(String args[]) throws ClientProtocolException, IOException
  {
    HttpPost httppost = new HttpPost("https://stanfordwho.stanford.edu/SWApp/Search.do");

    List<BasicNameValuePair> parameters = new ArrayList<BasicNameValuePair>();
    parameters.add(new BasicNameValuePair("search", "jsproch"));
    parameters.add(new BasicNameValuePair("filters", "closed"));
    parameters.add(new BasicNameValuePair("affilfilter", "everyone"));
    parameters.add(new BasicNameValuePair("btnG", "Search"));
    
    httppost.setEntity(new UrlEncodedFormEntity(parameters));

    HttpClient httpclient = new DefaultHttpClient();
    HttpResponse httpResponse = httpclient.execute(httppost);
    HttpEntity resEntity = httpResponse.getEntity();
    
    // Get the HTTP Status Code
    int statusCode = httpResponse.getStatusLine().getStatusCode();

    // Get the contents of the response
    InputStream input = resEntity.getContent();
    String responseBody = IOUtils.toString(input);
    input.close();
    
    // Print the response code and message body
    System.out.println("HTTP Status Code: "+statusCode);
    System.out.println(responseBody);
  }
}