RESTful Web service with Apache HttpClient

In this tutorials we are going to see the how to access the RESTful web service using Apache HttpClient.
Here i am going to create two clients to access GET and POST request
Add httpcore-4.1.jar, httpclient-4.1.1.jar, commons-logging-1.1.1.jar in you build path
GET Request
Refer this example for creating service http://www.javatutorialcorner.com/2014/01/jax-rs-get-using-restful-webservice.html
After create and run the service then create java client as given below
RSETApacheHttpClient.java

package com.javatutorialscorner.jaxrs.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;

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

  try {
   DefaultHttpClient defaultHttpClient = new DefaultHttpClient();
   HttpGet httpGet = new HttpGet(
     "http://localhost:8080/RESTful-WebService/rest/getservice/javatutorialscorner.com");

   HttpResponse httpResponse = defaultHttpClient.execute(httpGet);
   if (httpResponse.getStatusLine().getStatusCode() != 200) {

    throw new RuntimeException("Failed to connect service"
      + httpResponse.getStatusLine().getStatusCode());
   } else {
    BufferedReader bufferedReader = new BufferedReader(
      new InputStreamReader(httpResponse.getEntity()
        .getContent()));
    String response = null;
    while ((response = bufferedReader.readLine()) != null) {
     System.out.println(response);
    }

   }
   defaultHttpClient.getConnectionManager().shutdown();

  } catch (ClientProtocolException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }

 }

}

Now run the client program see the following output in console

Web Site : javatutorialscorner.com

POST Request
Refer this example for creating service http://www.javatutorialcorner.com/2014/01/jax-rx-post-using-restful-web-service.html

After create and run the service then create java client as given below

RSETApacheHttpClient.java

package com.javatutorialscorner.jaxrs.client;

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

import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.entity.StringEntity;

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

  try {
   DefaultHttpClient defaultHttpClient = new DefaultHttpClient();
   HttpPost httpPost = new HttpPost(
     "http://localhost:8080/RESTful-WebService/rest/restfulpost/post");
   StringEntity json = new StringEntity(
     "{\"name\":\"Ram\",\"id\":33,\"department\":\"EEE\",\"year\":2011}");
   json.setContentType("application/json");
   httpPost.setEntity(json);
   HttpResponse httpResponse = defaultHttpClient.execute(httpPost);
   if (httpResponse.getStatusLine().getStatusCode() != 201) {

    throw new RuntimeException("Failed to connect service"
      + httpResponse.getStatusLine().getStatusCode());
   } else {
    BufferedReader bufferedReader = new BufferedReader(
      new InputStreamReader(httpResponse.getEntity()
        .getContent()));
    String response = null;
    while ((response = bufferedReader.readLine()) != null) {
     System.out.println(response);
    }

   }
   defaultHttpClient.getConnectionManager().shutdown();
  } catch (UnsupportedEncodingException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }

 }

}

Now run the client program see the following output in console