How to Create RESTful Java Client using Apache HttpClient – Example

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This tutorial show you how to use Apache HttpClient to create a RESTful Java client to perform “GET” requests to REST service that created in this How to build RESTful Service with Java using JAX-RS and Jersey (Example) example.

Pre-requirement: Deploy above mentioned project successfully on Tomcat.

Make sure your Web Server Tomcat is running and URL http://localhost:8080/CrunchifyRESTJerseyExample/crunchify/ctofservice/ is accessible.

package com.crunchify.client;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

/**
 * @author Crunchify.com
 * 
 */

public class CrunchifyRESTJerseyApacheHTTPClient {
	public static void main(String[] args) {

		try {

			DefaultHttpClient httpClient = new DefaultHttpClient();
			HttpGet getRequest = new HttpGet("http://localhost:8080/CrunchifyRESTJerseyExample/crunchify/ctofservice/");
			getRequest.addHeader("accept", "application/xml");

			HttpResponse response = httpClient.execute(getRequest);
			if (response.getStatusLine().getStatusCode() != 200) {
				throw new RuntimeException("Failed : HTTP error code : " + response.getStatusLine().getStatusCode());
			}

			BufferedReader br = new BufferedReader(new InputStreamReader((response.getEntity().getContent())));
			String output;
			System.out.println("============Output:============");
			while ((output = br.readLine()) != null) {
				System.out.println(output);
			}

			httpClient.getConnectionManager().shutdown();

		} catch (ClientProtocolException e) {
			e.printStackTrace();

		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}

Output:

============Output:============
<ctofservice><celsius>36.8</celsius><ctofoutput>@Produces("application/xml") Output: 

C to F Converter Output: 

98.24</ctofoutput></ctofservice>

Other must read:

• Hello World Example – Spring MVC 3.2.1
• How to Create RESTful Java Client With Jersey Client – Example
• How to Create RESTful Java Client With Java.Net.URL – Example

The post How to Create RESTful Java Client using Apache HttpClient – Example appeared first on Crunchify.

Image may be NSFW.
Clik here to view.

Image may be NSFW.
Clik here to view.