Home Java • Download Java for the Web with Servlets, JSP, and EJB A Developer's by Budi Kurniawan PDF

Download Java for the Web with Servlets, JSP, and EJB A Developer's by Budi Kurniawan PDF

By Budi Kurniawan

Java for internet with Servlets, JSP and EJB is the single booklet you want to grasp Java net programming. It covers all of the applied sciences had to application internet purposes in Java utilizing Servlets 2.3, JSP 1.2, EJB 2.0 and client-side programming with javascript. those applied sciences are defined within the context of real-world initiatives, equivalent to an e-commerce software, a rfile administration application, dossier add and programmable dossier obtain, and an XML-based on-line ebook undertaking. as well as very good content material, this ebook comprises licenses to 2 Java net elements from BrainySoftware.com. You obtain a whole license of the Programmable dossier obtain part for advertisement and non-commercial deployment. you're additionally granted to a license to installation the authors renowned dossier add bean for non-commercial use, which has been approved via the Fortune 500 corporation trade One and acquired by means of significant organizations equivalent to Saudi company computer, Ltd. and Baxter Healthcare company.

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Extra info for Java for the Web with Servlets, JSP, and EJB A Developer's Guide to J2EE Solutions

Sample text

To retrieve initial parameters, you need the ServletConfig object passed by the servlet container to the servlet. After you get the ServletConfig object, you then can use its getInitParameterNames and getInitParameter methods. The getInitParameterNames does not take an argument and returns an Enumeration containing all the parameter names in the ServletConfig object. The getInitParameter takes a String containing the parameter name and returns a String containing the value of the parameter. Because the servlet container passes a ServletConfig object to the init method, it is easiest to write the code in the init method.

For example, you may want to have access to the ServletConfig object from the service method, when you are servicing the user. In this case, you need to preserve the ServletConfig object to a class level variable. This task is not difficult. You need to create a ServletConfig object variable and set it to the ServletConfig object returned by the servlet container in the init method. 4 gives the code that preserves the ServletConfig object for later use. First, you need a variable for the ServletConfig object.

Http, offers more advanced classes and interfaces that extend classes and interfaces from the first package. It is much more convenient to program using the second package. When you learn something, it is best to start with the basics and build a strong foundation. Servlet interface is very important because it encapsulates the life cycle methods of a servlet and it is the interface that all servlets must implement. You also need to know the servlet's context, which represents a servlet's environment, and the servlet's configuration.

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