Design And Implementation Of General Query Component

With the large-scale development of information industry, software development has gradually transformed from small-scale production into large-scale specialized production. Software industry can not be separated from data mining. Data extraction is an important part of data mining in a wide range. Extracting data from a system fast and accurately is one of the keys to develop software rapidly.In order to develop a stable system, simplify the application code, improve efficiency, the development of general query component is very necessary. General query component uses MVC design pattern and object-oriented design, uses the Java J2EE platform technology and Struts frame. General query component takes full advantage of Java, which makes the transplant of software from one platform to another easier. General query component also takes advantage of Struts frame, which reduce development time. It encapsulates the data access functions and query functions. The functions of general query component are as follows:Adding or modifying query definition in the database will be able to increase, modify or delete business rules. According to the pre-configured query definition, applications can automatically obtain HTTP context and use them as query parameters. General query component hides database differences. Query result model can use various ways to display results, so that it can meet the requirements of generating user interface automatically in the future. Finally, some query functions of tax system are designed and realized with the general query component.The usage of General query component in the project will not only improve efficiency of development, reduce redundant code, but also reduce the execution time of query function. General query component weakens dependency and coupling of different parts of the system. It shows the universal of general query component in similar management information system.