Jsp tutorial javaserver pages, java servlets, example. Network layer the network layer is responsible for the sourcetodestination delivery of a packet possible across multiple networks. If two systems are connected to the same link, there is usually no need for a network layer. The first line basically checks if a global variable called datalayer has already been declared. An example of a presentation service would be the conversion of an ebcdiccoded text computer file to an. The action class communicates with the application facade in the business logic layer. These objects can be directly used in scriplets that goes in the service method. The presentation layer is responsiblefor how the datas formatted to be presentedto the application layer above it. Is there any way i can convert my jsp output to pdf. The presentation layer is responsible for the delivery and formatting of information to the. The presentation layer is responsible for the formatting and delivery of information to the application layer for further processing or display. Applets and java web start cause problems since most browsers are delivered without java support and downloading and installing a jre requires quite a lot from the user. From the results we derive how to improve web presentation layer architecture.
The presentation layer is layer 6 of the sevenlayer osi model of computer networking. Jsp implicit objects are created during the translation phase of jsp to the servlet. Jsp can be used for separation of the view layer with the business logic in the web application. Jsp i about the tutorial java server pages jsp is a serverside programming technology that enables the creation of dynamic, platformindependent method for building webbased applications. Jspstyle comments are converted by the jsp page engine into java comments in the source code of the servlet that implements the jsp page. They are like html pages but with java code pieces embedded in them.
Presentation layer is the 6th layer of osi reference model. Jsp ppt presentation java server pages java servlet. I think what you mean is why did the tcpip model collapse layers 57 into layer 5. Java server pages jsp is a platform independent presentation layer technology that comes with sun s j2ee platform. Presentation layer protocols osi model communications. Jspjavaserver pages is a server side programming language. Thejavaee5tutorial forsunjavasystemapplicationserver9. A jsp compiler is used in the background to generate a servlet from the jsp page. Therefore, jspstyle comments dont appear in the output produced by the jsp page when it runs. In the seven layer osi model of computer networking, the presentation layer is layer 6 and serves as the data translator for the network. If it has, its left alone and execution proceeds to the push block. Developed and taught by wellknown author and developer. This chapter will present the use of javabeans within jsp.
Jsp configuration 3 standard jsp actions 6 white space preservation 145 attributes 147 comments 147 quoting and escape characters 149 implicit objects 150 pagecontext 153 out 154 config 157 page 159 jsp in xml syntax 159 xml rules 162 jsp documents 162 summary 165 viii contents. Contents preface29 parti introduction37 1 overview39. It is an object oriented language that uses the java servlets technology. Basically, any html file can be converted to jsp file by just changing the file extension from.
The presentation layer composed with plain jsps and servlets. Why are the session, presentation, and application layers. It is used to present data to the application layer layer 7 in an accurate, welldefined and standardized format. It can be thought of as an extension to servlet because it provides more functionality than servlet such as expression language, jstl, etc. Presentation layer components implement the functionality required to allow users to interact with the application. Jsp pages are converted into servlet by the web container. The presentation layer gets its name from its purpose. Its basically a translator and provides coding and conversion functions. Currently i use itext pdf library to generate pdfs. What is jsp jsp is a java based technology used to simplify the development ofdynamic web pages. There are 9 types of implicit objects available in the container. This layer includes user interface components and ui controls as well as presentation logic components that process and manage the user interaction. They are created by the container automatically, and they can be accessed using objects.
The primary goal of this layer is to take care of the syntax and semantics of the information exchanged between two communicating systems. Evaluating presentation layer development frameworks for. Jsp is a server side technology that does all the processing at server. The java code jsp on the server is classed as the implementation. Figure 21 shows a single arrow going from the web middle layer the servlet or jsp page to the client. This ensures that the following push will always work so heres the recap. There are several reasons for this, not least of which was the utter failure of the osi as a networking stack. View and controller belongs to presentation layer as controller takes the url and directs to appropriate view based on the given url.
If, however, datalayer has not been defined, the first line then assigns a new, empty array to it. The presentation layer is layer 6 of the 7layer open systems interconnection osi model. Jsp technology is used to create web application just like servlet technology. The presentation layer is an important layer in the osi model because it is responsible for some of the important services like data conversion, data compression, encryption, and decryption. It then summarizes how to obtain and configure the software you need to write servlets and develop jsp documents. Part of this formatting processis being able to act as a translator for the network. Request comes to the controller, controller decides is. The fundamental abstraction in jsp is the sequential data stream. It is a presentation framework, you may have doubt how mvc belongs to only presentation layer. Presentation layer the presentation layer is concerned with preserving the meaning of information sent across a network. The stack consists of springmvc, sitemesh, and jquery.
Presentation layer of osi reference model studytonight. Jsp provides the flexibility to handle large amount of dynamic data, databases with performance and stability it has the ability to integerate with html very easily to enhance the presentation of a. Servlet and jsp programming with ibm websphere studio and visualage for java. The request from the browser will be centralized to the action handler servlet and delegates to the corresponding action class. Jsp ppt presentation free download as powerpoint presentation. It is a presentation layer technology independent of platform. Html and graphics displayed on the web browser are classed as the presentation layer.
The data access layer in the data access layer, jdbc java database connectivity is used to connect to databases, make queries, and return query results, and custom connectors work with the sun java system application server to enable communication with legacy eis systems, such as. Jsps are normal html pages with java code pieces embedded in them. Jsp page is a simple text file consisting of html or xml content along with jsp elements sort of shorthand for java code inside the jsp container is a special servletcalled the page compiler. The presentation layer may represent encode the data in various ways e. Moreover we get frequent layoutui changes for the webpage, so we have make the same changes to pdf. The complete reference phil hanna osbornemcgrawhill new york chicago san francisco lisbon london madrid mexico city milan new delhi san juan seoul singapore sydney toronto. Its origins lie in the data processing systems that grew up in the 1960s, when reliable, relatively cheap, and adequately powerful computers first became generally available. I have to display the contents of the page in the pdf. However, if the two systems are attached to different networks, there is often a need for the network. Tcpip, as a protocol, was the clear and obvious win. The way this works is the presentation layeron the sending station, for. Presentation layer, business logic layer, and data layer. Presentation layer takes care that the data is sent in such a way that the receiver will understand the information data and will be able to use the data. The jsp pages are easier to maintain than servlet because we can.
Web presentation layer architecture in this chapter we provide a discussion of important current approaches to web interface programming based on the model 2 architecture 59. A successful data transfer technique is to adapt the data into a standard format before transmission. The presentation layer is responsible for the delivery and formatting of information to the application layer for further processing or display. Jsp in perspective introduction jsp is a method of program design. Jsp is used to separate dynamic content of web pagefrom its content with the help of html and jsp tags. This tutorial is provide by sher singh bardhan to learn jsp with examples. Write html read and maintain the html jsp makes it possible to. Java ee architecture, part one 10 the client layer, contd browser with applet or java web start lots of things can be done with html, css, java script etc.
Next, i had to create a jsp script that used pdfone to create a new pdf document and send it down to the browser. The problem is creating pdf with itext is quite a challenge. It is used for creating dynamic web applications, using java as programming language. Presentation layer protocols free download as powerpoint presentation. The next layer of the osi model we want to talk aboutis layer six, or the presentation layer. Enabling technology for this is the nsp concept of typed server side calls to server pages. User interface presentation layer this section provides a list of howto guides for the uxt ui stack.
191 485 428 1069 44 174 1079 233 1081 31 523 35 1276 1308 17 760 726 138 149 1041 139 596 1076 192 1221 971 849 796 362 193 1089 531 715 1466 1401 527 1397 520 239