By Giulio Zambon
Because the majority of Java builders are just Web-tier builders; Java applied sciences like JavaServer Pages (JSP), JavaServer Faces (JSF), and Apache Tomcat are regularly appropriate and correct to their wishes. starting JSP, JSF and Tomcat: From beginner to expert is the 1st and even perhaps simply starting point publication of its style combining the obviously complimentary JSP, JSF and Tomcat net applied sciences into one consolidated therapy for builders concentrating on simply Java internet software improvement and deployment. This publication is examples-driven utilizing a realistic, real-work e-commerce case examine and situation all through e-book.
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Extra resources for Beginning JSP™, JSF™ and Tomcat Web Development: From Novice to Professional (Beginning from Novice to Professional)
GetAttribute("imageUrl"). Request Handling When the servlet receives a request, it forwards it to a JSP page on the basis of the request parameter action, which in turn is set by the previous page, which depends on what the user does. For example, the page that shows the shopping cart also includes a button to check out. If the user clicks on it, the page will send to the servlet a request with the action parameter set to "checkOut". The View Table 2-4 shows the list of all JSP pages in the application.
Servlet> ... xml, you can change the parameters without having to modify the application code. Table 2-3 shows the initialization parameters defined for this application. Table 2-3. Driver dbUrl jdbc:mysql://localhost:3306/shop dbUserName root dbPassword .. For ease of use, we didn’t make the database password-protected, but this is obviously something you’d want to do in real life. getServletContext(). getAttribute("imageUrl"). Request Handling When the servlet receives a request, it forwards it to a JSP page on the basis of the request parameter action, which in turn is set by the previous page, which depends on what the user does.
Note that JSP doesn’t need to know where the list is kept. This is the first hint at the fact that application logic and presentation are separate. jsp. For now, let’s proceed with the analysis of the home page. If Scriptlet 1 discovers that the book list exists, it copies it into the select control one by one (as shown in Scriptlet 2). Notice how JSP simply creates each option by writing to the out stream. When the buyer clicks on the Add to Cart button after selecting a title and setting the number of copies, the home page posts a request to the servlet with the address eshop and with the hidden parameter do_this set to add.