针对复杂的传统Java智能卡指令解析问题,结合Applet的部署特点,提出了指令预解析的概念 给出了转换后的Applet文件(CAP,Converted Applet file)中导入组件、常数池和导出组件的预解析优化存储结构及包注册表结构,使用定长存储结构替代原有的变长存储结构以加快查找过程,引入了导出组件辅助索引表以加快外包类的解析过程 设计了基于优化后组件的静态域、静态方法和类访问字节码指令的快速解析流程,将解析算法的时间复杂度降为常数阶 在Applet下载过程中通过预解析来生成优化后的组件存储结构,在执行过程中依据快速解析流程来完成静态域、静态方法和类对象的快速访问,从而缩短了Applet运行时的解析时间.测试结果表明,在不改变标准Applet下载、运行流程的情况下,该方法有效地减少了卡内存储器的访问次数,缩短了解析算法的执行时间,提高了Applet执行的整体性能.

-For a complex of traditional Java smart card command parsing problems with the Applet deployment characteristics of proposed pre-analytic concept of instruction　gives converted Applet file (CAP, Converted Applet file) to import components and export components of constant pool pre-analytical optimization of storage structure and package the registry structure, and the use of fixed-length storage structure replaced the original variable-length storage structure to speed up the search process, the introduction of secondary index table to export components to speed up the resolution process outsourcing category　designed based on optimization After the components of the static fields, static methods and class byte code instructions to access the rapid resolution processes, analytical methods will be reduced to constant time complexity order　in Applet download process through pre-parsing to generate the optimized storage structure components , in the implementation process based on rapid