Design And Implementation Of Extjs Framework Based Tax Online Examination System

In recent years, as the national informationization level improves with the rapid development of information technology, information asymmetry between tax-levier and taxpayer has been increasingly serious. So, the tax department urgently needs to strengthen business and technology integration to improve tax collection and administration and paying-taxes service and even entire taxation by modern information technological means. Based on this trend, Shaanxi Province Office.SAT gave information-based tax administration thinking, deciding to cultivate a set of IT talents with utmost efforts and independently develop system software to meet needs of tax business informationization.For better, faster and more convenient software development, IT department mainl-y studied ExtJs technology based rich client framework so that a complete set of softwa-re development framework and method ranging from front-end to back-end took shape gradually during software development by ExtJs technology. This method separates con tent and display by MVC software design mode; designs front-end Ajax application dev elopment framework unrelated to back-end technology by Extjs3.0; guarantees seamless connection with the current Web application under J2EE-the exiting application mode1and fulfills realtime deployment and cross-platform use by Rich Client technology.This dissertation stressed on Extjs design based and fulfilled RIA development framework of Shaanxi Province Office.SAT in independent tax software development. Then the specific framework application was explained by the example of tax online examination system; the entire process of system design and development was introduced in detail by use of data flow diagram, ER diagram, program flow diagram, etc.Extjs-based RIA application development framework has been used in many tax software developments. It has proven that the development of application of this framework simplifies the task complexity of developers to achieve brand-new user experience and improves the quality of software reuse. Besides, it makes system upgrading and maintenance-much easier with good effects, reflects the work thoughts of information-based tax administration, giving a strong support for the tax informationatization.