Configuring the hello web service using REST web services

Download following api

jersey-bundle-1.19.jar

http://repo1.maven.org/maven2/com/sun/jersey/jersey-bundle/1.19/jersey-bundle-1.19.jar

Create project with name: TestWeb

Made changes into  web.xml


<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>TestWeb</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>

  <servlet>
<servlet-name>Jersey Web Application</servlet-name>
<servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Jersey Web Application</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
</web-app>


Made changes into Java class
package com.test.rest.service;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Response;

@Path("/user-management")
public class TestRestService
{
    @GET
    @Path("/users")
    public Response getAllUsers()
    {
        String result = "<h1>Web  Application</h1>In real world application, a collection of users will be returned !!";
        return Response.status(200).entity(result).build();
    }

}

Deploy the application on tomcat and try to invoke service using following URL:

http://localhost:8088/TestWeb/user-management/users/


Client Code:

Need to download:
jersey-client-1.19.jar
From below location

http://repo1.maven.org/maven2/com/sun/jersey/jersey-archive/1.19/jersey-archive-1.19.zip

Once done then
Create ClientTest class and get the output of the REST result

package com.test.client.service;

import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.ClientResponse;
import com.sun.jersey.api.client.WebResource;

public class ClientTest
{

    public static void main(String[] args)
    {
        try
        {

            Client client = Client.create();

            WebResource webResource = client.resource("http://localhost:8088/TestWeb/user-management/users");

            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("Output from Server .... \n");
            System.out.println(output);

        }
        catch (Exception e)
        {

            e.printStackTrace();

        }

    }
}

Output:

Output from Server ....


<h1>Web  Application</h1>In real world application, a collection of users will be returned !!