Campus Network-based Integrated Information System

Integration of heterogeneous data have important practical significance, in reality, a lot of units and enterprises to run multiple independent information systems, and these systems due to hardware, network, operating system and other reasons, not the effect of work Well, while the integration of heterogeneous information systems are designed to solve this problem is to provide users with a transparent service. This article is divided into two major parts, the first part of the body system introduced the concept of related technologies and, second half by implementing a specific system, can be seen from the system, through heterogeneous integration, efficiency and coordination of the whole system Indeed improved a lot.To the user, the user heterogeneous data sources shielded characteristics. Since it is a heterogeneous system, there must be a number of different systems involved, so the system can be the first to achieve three separate systems, namely, the library system, educational system, financial system, and then on the basis of the three systems in Reality an integrated system, responsible for integrating heterogeneous data, and when in heterogeneous integrated systems, when to do anything, we must ensure that all the separate systems can run as usual and can ensure data consistency and integrity.Information integration system is designed to integrate heterogeneous data sources to provide a unified data resources Integrated system has two parts, one is the corresponding rules, corresponding to the rules we use XML format to store, the advantages of using XML is independent of the operating system and database. One is the middleware system, middleware is responsible for system integration between systems and a logical bottom layer, to provide non-discriminatory services for the upper shield between heterogeneous sources, the next instruction to be translated into the corresponding top of each independent system Specific instructions were executed.Up and down according to the middleware the different functions, to be divided into two parts, to provide services for, called up the middleware, up the main role of middleware is to organize all the data underlying the system pass over, into the upper Understanding the XML format. And remove one of the redundancy. If the top need to check all the information a student, then down through the translation of the middleware, the one instruction were translated into three commands sent to the financial system, library systems and academic systems, financial systems, results of the implementation of the SQL statement is returned: the student's student number, name, accommodation should be paid the amount of tuition fee should be paid, accommodation is already paid, tuition fees are already paid. The library system in the return message is: the student's student number, the student's name, the student number and library books borrowed by the name of the student's library account balance. Educational system to return search results are: the student's student number, the name of student, the student gender, nationality, telephone, email, date of admission, specialty, where the classes and courses of their choice. It is obvious that these data sets have a lot of redundancy. And field values may be different, such as the financial system returns the student ID field is student_num, the library system and educational system returns the student ID fields are student_id, in fact, what they mean is the same, this time on the need to System Integration Map pick of all the fields mean the same, choose one only, understanding and using the upper field, the final form XML format back to the top users.