Credit Card Transactions Online Management System Based On J2EE, AJAX Technology

With the rapid development of Web technology, the WEB system which is based on the B/S structure, in particular, J2EE technology as the representative of the distributed object system has been widely used.However, with the development of electronic commerce, the negative of the B / S structure WEB system when it used in the interactive between user interface and server is reflected out gradually. Under the traditional B / S mode, the function of system is distributed in the each WEB page that is provided by service; user using the system function is constantly repeated: Submission - wait - Response - refresh process. User's actions always synchronized with the server, if the speed of the network is slow or the pressure of the service load is large, the user will have poor experience. The logic of System performance is in the server-side, the interface issues is completed by service that makes performance load only on the server, the user port computing power can't be used . So the value of the AJAX technology, which is based on asynchronous interaction technology, as well as the rich client port model, which includes the presentation layer logic, are gradually becoming prominent.Ajax (Asynchronous JavaScript and XML) is integrated Java technology, XML, JavaScript, through the browser port's JavaScript, DHTML and XMLHttpRequest object realize the asynchronous communication with server, no need to refresh pages just need to update the local. In the rich client model, the user interface all included in the client port, the logics among the user interface are controlled by the client port, the server is responsible only for data. Through Ajax and the rich client co-ordination, the closer to the desktop application experience and more sensitive response of Web applications can be created.The system that is the management system of the credit card transactions online based on J2EE, and through GWT to realize AJAX and rich client port. The system is used for managing, maintenance businesses Group Information and its affiliated business transaction terminals information, managing the data of credit card transaction and generating transactions graphics and reports in accordance with user requirements, and support for configuration parameters of credit card transactions system online. From the function point of view, the system is divided into three subsystems: information management system, transaction enquiries and report generation system, transaction parameters configuration system. In the development of this system, it involved current e-commerce and the variety theory and techniques of J2EE, such as WEB technology, JDBC technology, JavaScript, Ajax, GWT, XML, rich client, and so on. The system's Client port that is complier by GWT, will become to a pure JavaScript interface.This paper do in-depth discussions and research from outline design, business process design, function module division, specific functional modules realization aspects, and do a lot of work in the development of software. The example of the Paper, the credit card transaction platform has been used and worked well.