This tutorial show you how to use Jersey client APIs 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.
package com.dineshonjava.ws.rest.client; import com.sun.jersey.api.client.Client; import com.sun.jersey.api.client.ClientResponse; import com.sun.jersey.api.client.WebResource; /** * @author Dinesh Rajput * */ public class RestWebServiceClient { /** * @param args */ public static void main(String[] args) { RestWebServiceClient client = new RestWebServiceClient(); client.sayHello(); client.getMessage("Welcome"); client.getXMLEmployees(); client.getXMLEmployee(11111); client.getJSONEmployees(); client.getJSONEmployee(11111); } private void sayHello() { try { Client client = Client.create(); WebResource webResource = client.resource("http://localhost:8181/sdnext/doj/webservice/hello"); ClientResponse response = webResource.accept("text/plain").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("n============getResponse============"); System.out.println(output); } catch (Exception e) { e.printStackTrace(); } } private void getMessage(String msg) { try { Client client = Client.create(); WebResource webResource = client.resource("http://localhost:8181/sdnext/doj/webservice/message/"+msg); ClientResponse response = webResource.accept("text/plain").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("n============getCResponse============"); System.out.println(output); } catch (Exception e) { e.printStackTrace(); } } private void getXMLEmployees() { try { Client client = Client.create(); WebResource webResource = client.resource("http://localhost:8181/sdnext/doj/webservice/employees"); 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("n============getCResponse============"); System.out.println(output); } catch (Exception e) { e.printStackTrace(); } } private void getXMLEmployee(int empid) { try { Client client = Client.create(); WebResource webResource = client.resource("http://localhost:8181/sdnext/doj/webservice/employee/"+empid); 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("n============getCResponse============"); System.out.println(output); } catch (Exception e) { e.printStackTrace(); } } private void getJSONEmployees() { try { Client client = Client.create(); WebResource webResource = client.resource("http://localhost:8181/sdnext/doj/webservice/json/employees/"); ClientResponse response = webResource.accept("application/json").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("n============getCResponse============"); System.out.println(output); } catch (Exception e) { e.printStackTrace(); } } private void getJSONEmployee(int empid) { try { Client client = Client.create(); WebResource webResource = client.resource("http://localhost:8181/sdnext/doj/webservice/json/employee/"+empid); ClientResponse response = webResource.accept("application/json").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("n============getCResponse============"); System.out.println(output); } catch (Exception e) { e.printStackTrace(); } } }
output:
============getResponse============
Hello World!!! dineshonjava
============getCResponse============
Welcome
============getCResponse============
<?xml version=”1.0″ encoding=”UTF-8″ standalone=”yes”?>
<employees>
<employee>
<address>New Delhi</address>
<employeeId>22222</employeeId>
<employeeName>Abhishek</employeeName>
<jobType>Marketing</jobType>
<salary>50000</salary>
</employee>
<employee>
<address>Noida</address>
<employeeId>11111</employeeId>
<employeeName>Dineh Rajput</employeeName>
<jobType>Sr.Software Engineer</jobType>
<salary>70000</salary>
</employee>
</employees>
============getCResponse============
<?xml version=”1.0″ encoding=”UTF-8″ standalone=”yes”?>
<employee>
<address>Noida</address>
<employeeId>11111</employeeId>
<employeeName>Dineh Rajput</employeeName>
<jobType>Sr.Software Engineer</jobType>
<salary>70000</salary>
</employee>
============getCResponse============
{“employee”:[{“address”:”New Delhi”,”employeeId”:”22222″,”employeeName”:”Abhishek”,”jobType”:”Marketing”,”salary”:”50000″},{“address”:”Noida”,”employeeId”:”11111″,”employeeName”:”Dineh Rajput”,”jobType”:”Sr.Software Engineer”,”salary”:”70000″}]}
============getCResponse============
{“address”:”Noida”,”employeeId”:”11111″,”employeeName”:”Dineh Rajput”,”jobType”:”Sr.Software Engineer”,”salary”:”70000″}
Download Source Code + Libs
RESTClient.zip
References
1. JAVA REST Web Services
2. Wikipedia for REST Web Service
Hi, I have used this tutorial but I am getting 404 error when I run the application. Can u pls help?