Research and Application of Ajax Frameworks in J2EE Structure.pdf

1、With the emergence and development of Web2.0, more and more people areconcerned with ajax (Asynchronous JavaScript And XML).Ajax technology introducesa mechanism for asynchronous response, it can refresh partial pages an

2、d upgrade theuser experience. Contrasting with Applet, Flash and other traditional Web technology,Ajax can be used irectly and sends asynchronous requests through heXMLHttpRequest object in the most browsers wit

3、hout requiring pecialized softwaresupport. Therefore, Ajax technology improves availability of the application through the elimination of excessive Web pages refreshing. However, during the use of Ajax technology,

4、developers need to build XMLHttpRequest object and realize callback functions. If all such details need to be realized on every element of web pages, there would be a lot of work to do and it is not easy for codes man

5、agement. At the same time, programmers are required to be very familiar with web technologies such as JavaScript, DOM, X1vIL and others to control the effect of applying勺ax well. In the process of interaction with the se

6、rver, there are certain flaws of data transmission security and logical processing on the backend. It seems that these have confirmed that the bottom technology of Ajax is still at an initial stage, and can not be widely

7、 used.With the rapid devel of Ajax technology,makes the development of Ajax applied in Web the emergence of ajax application more rational, rapid and more powerful. Ajax solve the defects of Ajax. This paper uses t

8、he application of Ajax frameworks in J2EE development model to provide browsers with abundant reusable browser-interface components not only more the rich and pow expression, but also more security, more agile and more r

9、easonable with the server-side interactive data. Developing at an amazing speed, Ajax framework is endless field of new technologies, and plays a major role in web application development and the broad application of

10、 Web2.0. On the basis of researching on the field of Ajax frameworks, the paper chooses the popular Ajax frameworks ExtJS and DWR to do more research. Paper summarizes the specific application process and fundamentals o

11、f application in addition with their advantages compared with the traditional UI development and solution on rectifying the application of Ajax technology. On the server-side, this paper introduces the applicable process

12、 and fundamental of DWR and does some research on DWR relevant issues and concerned about security. The core of this paper is the integrated design method of Ajax frameworks and their specified realization. The integrate

13、d method is innovatively used to solve the traditional code issue of Ajax technology. Based on this method, an information system is designed and realized to put forward the realization of asynchronous requests of UI-con