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Getting Started with JAX-WS Web Services
                                                          from NetBeans Web Service tutorials
Java API for XML Web Services (JAX-WS) 2.0/2.1, JSR 224, is an important part of the Java EE 5 platform. A follow-up to the release of Java API for XML-based RPC 1.1(JAX-RPC), JAX-WS simplifies the task of developing web services using Java technology. It addresses some of the issues in JAX-RPC 1.1 by providing support for multiple protocols such as SOAP 1.1, SOAP 1.2, XML, and by providing a facility for supporting additional protocols along with HTTP. JAX-WS uses JAXB 2.0 for data binding and supports customizations to control generated service endpoint interfaces. With its support for annotations, JAX-WS simplifies web service development and reduces the size of runtime JAR files.

Creating a Web Service
Choosing a Container
You can either deploy your web service in a web container or in an EJB container. This depends on your choice of implementation. If you are creating a Java EE 6 application, use a web container in any case, because you can put EJBs directly in a web application. For example, if you plan to deploy to the Tomcat Web Server, which only has a web container, create a web application, not an EJB module.

1. Choose File > New Project (Ctrl-Shift-N). Select Web Application from the Java Web category or EJB Module from the Java EE category.
2. Name the project CalculatorWSApplication.
3. Click through the remaining pages and click Finish.

Creating a Web Service from a Java Class

1. Right-click the CalculatorWSApplication node and choose New > Web Service.
2. Name the web service CalculatorWS and type org.me.calculator in Package.
3. If you are creating a Java EE 6 project, leave Create Web Service from Scratch selected, and select Implement Web Service as a Stateless Session Bean.

4. Click Finish. The Projects window displays the structure of the new web service and the source code is shown in the editor area.

Designing the Web Service
Adding an Operation to the Web Service

1. Change to the Design view. (Note: The Preview view in NetBeans 6.5.1 is disabled.)

2. Click Add Operation in the visual designer. A dialog box appears where you can define the new operation.
3. In the upper part of the Add Operation dialog box, type add in Name and type int in the Return Type drop-down list. In the lower part of the Add Operation dialog box, click Add and create a parameter of type int named i. Then click Add again and create a parameter of type int called j. You now see the following:

4. Click OK at the bottom of the Add Operation dialog box. The visual designer now displays the following:

5. Click Source and view the code that you generated in the previous steps. It differs whether you created the service as an EE6 stateless bean or not. Can you see the difference in the screenshots below?

6. In the editor, extend the skeleton add operation to the following (changes are in bold):

@WebMethod
public int add(@WebParam(name = "i") int i, 
@WebParam(name = "j") int j) {
int k = i + j;
return k;
} 

Deploying and Testing the Web Service
To test successful deployment to a web container:

1. Right-click the project and choose Deploy. The IDE starts the application server, builds the application, and deploys the application to the server. You can follow the progress of these operations in the CalculatorWSApplication (run-deploy) and GlassFish or Tomcat tabs in the Output view.
2. If you deployed to the Tomcat Web Server, you will see the following instead, which indicates that you have successfully deployed your web service:

Consuming the Web Service
Client : Java Class in Java SE Application

1. Choose File > New Project (Ctrl-Shift-N). Select Java Application from the Java category. Name the project CalculatorWS_Client_Application. Leave Create Main Class selected and accept all other default settings. Click Finish.
2. Right-click the CalculatorWS_Client_Application node and choose New > Web Service Client.
3. In Project, click Browse. Browse to the web service that you want to consume. When you have selected the web service, click OK.
4. Leave the other settings at default and click Finish. The Projects window displays the new web service client, with a node for the add method that you created:

5. Double-click Main.java so that it opens in the Source Editor. Delete the TODO comment and then drag the add node above into the empty line. You now see the following:

public static void main(String[] args) {
try {
// Call Web Service Operation
org.me.calculator.CalculatorWSService service = 
new org.me.calculator.CalculatorWSService();
org.me.calculator.CalculatorWS port = 
service.getCalculatorWSPort();
// TODO initialize WS operation arguments here
int i = 0;
int j = 0;
// TODO process result here
int result = port.add(i, j);
System.out.println("Result = "+result);
} catch (Exception ex) {
// TODO handle custom exceptions here
}
}