The Research Of Campus One-card-through Application System Based On Java Card Technology

Since the smart card was invented in 1970s, it has been used widely in the world. But the development of one-card-through system is quite difficult and time-consuming because of many reasons. However, the Java Card technology is apt to deal with the conflict among various programs. There are many advantages of this technology, such as easy-programming, quick-development, secure, extensible, re-use and cross-platform.There is not a campus card application system based on Java Card technology in Chinese college because of high price. But it is a trend that this technology is used widely with the increase of consumption capability and the decrease of the scale cost.At the beginning of this thesis, it discusses the complexity of campus one-card-through system development, and strong points of Java Card in this problem. Subsequently, the meaning of this project is indicated. Then this thesis shows the principle, architecture and criterion. Moreover, it explains the features of Java Card Applet.In the next part, it tells how to complete the sub-system of data balance by using Java Card technology in detail. And gives emphasis to the process of design and achievement of Applet on card. At first, it analyses the three parts of an application system and discussed the functions and effect of each part in this part. Then it introduces the function definition, the acquirement of AID, the design of class and the establishment of the interface between Applet and terminal in turns. Finally it shows the initialization of constant, the definition of return value, the function and flow chart of main method in brief.The last part talks about many problems on the security of campus card application system, takes measures by using Java Card technology, and analyses the merits of this system in this aspect.