An Application Of AJAX To A Comprehensive Financial Information Publishing System

With the rapid development of AJAX technology,it has greatly expanded the ability of web applications, which introduces asynchronous transfer technology, promoted local renewable pages, and enhanced users' experience. Compared with traditional web technologies, such as Java Applet, Flex, AJAX etc., AJAX can be used in lots of popular browsers without specialized , which just uses XMLHttpRequest to send asynchronous request.The key relative technologies of the AJAX include JavaScript , XMLHttpRequest, DOM, XML. JavaScript acquires parameters information by DOM and send the asynchronous request by XMLHttpRequest. It returns the ordinary TEXT, XML or JSON after servers' handling with the request. Then, browser explains TEXT, XML and JSON by JavaScript, and updates relevant user interface by DOM.Based on the AJAX technology and under the J2EE framework, this paper studies the Web application's asynchronous interactive mode. It clarifies the scope of the application for this technology on theory, and provides a theoretical basis for the best practice through research the core technology and the development model of AJAX. In practice, under the practical software design, the paper designs and implements the comprehensive financial information publishing system that based on EXT2.0 frame.As for its contents, the paper makes research on the Rich Client Application's characteristics and AJAX tech solution, and compares them with the traditional web applications; Then it analyzes the demands of Rich Client in the comprehensive financial information publishing system; Finally, combined with the strictly secure requirement by banking, it analyzes security, competency of AJAX and necessary methods.