IBM Version 5 Test the passenger list application, Compiling XSL, Javax.xml.transform.Transformer

￿javax.xml.transform.TranfrormerFactory

This is responsible for crating transformer object. TrasformerFactory is abstract, and its new instance method is used to instantiate an instance of Transformer class.

￿javax.xml.transform.Transformer

This instance is used to perform the actual transformation. It is not tread-safe, so in a threaded servlet environment; this should be an instance variable. By this restriction, you need to load XSLT on every request.

9.1.9Test the passenger list application

In this section we test the passenger list application. You need to copy the passengerList.xsl to the /WEB-INF/xsl folder, and copy the passengerList.xml to the /WEB-INF folder in the Travel project. To test the application we have to start a WebSphere test environment, and call the servlet from the browser. Since the servlet does not need an input parameter, and implements doGet method, it can be called using the URL directly.

Figure 9-10 passengerList result page

9.1.10 Compiling XSL

Since the Transformer is not a thread-safe, we need to instantiate the Transformer on every request. Actually, in the doGet method, it is loading XSL file from the stream every request. The XSLT Complier enables that it load in to the Java vm as an object and reuse in the servlet instances. JAXP supplies the template’s interface to provide consistency. This interface has newTransformer

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