The client uses the scheme based on browser and java applete together . the map display mode uses the scheme based on vector map and grid map . thus the better combination of functions with load can be gained through respective strongpoints 客户端采用了基于浏览器和java小应用程序的结合方案，而地图的显示方式也采用结合矢量图和栅格图的方案，这样可以利用各自的优点来达到更好的功能负载结合点。
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 在这一部分中，首先分析了系统应用程序结构的三大部分；然后依次讨论了各个部分的功能和作用，逐步介绍了如何实现卡上小应用程序的过程；最后简要说明了程序中用到的常量的初始化、返回值的定义和主要方法的功能和流程图。
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 本文首先讨论了目前开发校园一卡通系统的复杂性和采用javacard技术开发此类系统的独特优势，进而指出了选题的意义；然后叙述了javacard技术的基本原理、体系结构和技术规范，并分析了用javacard技术开发卡上小应用程序的特点。
We also discuss the security considerations of datasocket and introduces the support to opc with datasocket in labview . based on datasocket api and dstp protocol , we develop the programs of activex controls and java applet , which can be run in web browser to access remote vi application . the java applet is developed with datasocket javabean and third - party interface components at ibm visualage for java , we regard it as a way for cross - platform interactive access solution in the future 针对datasocket网络通信机制及dstp协议是美国ni公司专门为labview bridgeview等虚拟仪器通信提出的新型通信标准，进一步研究了基于datasocket的开发，并初步设计实现了基于datasocket通信机制访问远程虚拟仪器应用程序的activex控件和java小应用程序，而它们都能运行于普通web浏览器中，其中用java实现的虚拟仪器远程访问应用，采用datasocketjavabean和第三方的界面组件及ibmvisualageforjava开发平台，实现了有一定虚拟仪器界面和具有较好安全性和跨平台性的java应用，具有一定的先进性和创新性。
