外文翻譯---基于web服務(wù)的無線食品點(diǎn)菜系統(tǒng)-其他專業(yè)-展示頁
2025-01-31 09:28本頁面
【正文】 of using handheld terminals and notebook puters to transmit realtime information to centralized hosts for processing. Today WLANs are being more widely recognized as a generalpurpose connectivity alternative for a broad range of business customers. B. Web Services Quickly being a significant technology in the evolution of the Inter is web services, a set of standards that can interconnect systems over a verity of works. It is an open XMLbased technology providing a generic data exchange format and has been rapidly adopted by many vendors. Web services can easily be built upon existing applications, no matter what the underlying technology is. Because they are expected to have a growing familiarity and acceptance among many users and offer great technological promises, Web services are an interesting subject for the investigation of their possible application in many systems . Web services are a new generation of web application. It bines the advantages of the ponentoriented methods and web techniques, and they can describe its own service. It can also publish, locate and transfer modularized application in web. The provided functions of web services may be simple, but it also contains extraordinary plicated business logic. Web services represent a kind of implementation of SOA (ServiceOriented Architecture), and they are the most popular one. In addition, the three operations of SOA can only process when the ponents of SOA interact. Therefore some standardized techniques are used in web services, including UDDI, WSDL, HTTP, SOAP, and XML and so on. Web services bee the best choice for developing application of SOA . III. DESIGN AND I MPLEMENTATION OF THE SYSTEM A. System Architecture In the system, we adopt fourtiered webbased clientserver architecture. Figure 1 shows the overview of the system architecture. The system is conceptually posed of six main ponents: the web server, database server, cash register, mobile context server, mobile user and desktop user. The web server provided relevant information for mobile devices or desktop PCs on a wired/wireless integrated local area work using WSDL (Web Service Description Language) to describe functions and protocols. The web server then transmits to the mobile devices or desktop PCs. The user binds the web server and the WSDL. This enables the web service to be used by correspondence using SOAP (Simple Object Access Protocol). The database server saves all information of the system such as food information, ordering information, client information. The cash register is responsible for cost calculation of the consumer. The mobile context server applies context to the contents by using styles, an attribute override, and templates according to the resources of a given mobile device. Desktop users can ask for services after checking the WSDL of the service from the web server. A desktop on a wired work can be used to browse full contents on one screen shot. When a user requests food information through a wired work, the web server serves the information by connecting to the database server. When a user requests food information through a wireless work, the mobile context server divid
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