This tutorial show you how to use Jersey client APIs to create a RESTful Java client to perform “GET” requests to REST service.
Pre-requirement:
Deploy Project How to build RESTful Service with Java using JAX-RS and Jersey (Example).
Make sure your Web Server Tomcat is running and URL http://localhost:8080/CrunchifyRESTJerseyExample/crunchify/ctofservice/ is accessible.
package com.crunchify.client;
import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.ClientResponse;
import com.sun.jersey.api.client.WebResource;
/**
* @author Crunchify
*
*/
public class CrunchifyRESTJerseyClient {
public static void main(String[] args) {
CrunchifyRESTJerseyClient crunchifyClient = new CrunchifyRESTJerseyClient();
crunchifyClient.getCtoFResponse();
crunchifyClient.getFtoCResponse();
}
private void getFtoCResponse() {
try {
Client client = Client.create();
WebResource webResource2 = client.resource("http://localhost:8080/CrunchifyRESTJerseyExample/crunchify/ftocservice/90");
ClientResponse response2 = webResource2.accept("application/json").get(ClientResponse.class);
if (response2.getStatus() != 200) {
throw new RuntimeException("Failed : HTTP error code : " + response2.getStatus());
}
String output2 = response2.getEntity(String.class);
System.out.println("\n============getFtoCResponse============");
System.out.println(output2);
} catch (Exception e) {
e.printStackTrace();
}
}
private void getCtoFResponse() {
try {
Client client = Client.create();
WebResource webResource = client.resource("http://localhost:8080/CrunchifyRESTJerseyExample/crunchify/ctofservice/40");
ClientResponse response = webResource.accept("application/xml").get(ClientResponse.class);
if (response.getStatus() != 200) {
throw new RuntimeException("Failed : HTTP error code : " + response.getStatus());
}
String output = response.getEntity(String.class);
System.out.println("============getCtoFResponse============");
System.out.println(output);
} catch (Exception e) {
e.printStackTrace();
}
}
}
Output:
============getCtoFResponse============
<ctofservice><celsius>40.0</celsius><ctofoutput>@Produces("application/xml") Output:
C to F Converter Output:
104.0</ctofoutput></ctofservice>
============getFtoCResponse============
@Produces("application/json") Output:
F to C Converter Output:
{"F Value":90,"C Value":32.22222137451172}