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Data processing method, device and system of JAVA intelligent card

A data processing and smart card technology, applied in the computer field, can solve the problems of low operation efficiency and long time-consuming CAP file processing, and achieve the effect of improving operation efficiency and reducing processing delay.

Inactive Publication Date: 2010-09-22
BEIJING WATCH DATA SYST
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Problems solved by technology

[0005] Embodiments of the present invention provide a JAVA smart card data processing method, device and system to solve the problems in the prior art that JAVA smart cards take a long time to process CAP files and have low operating efficiency

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Embodiment Construction

[0024] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0025] In order to solve the above technical problems, in the embodiment of the present invention, the flag bit in the method header of each method in the Method component is extended, such as, when the value of the flag bit is 0X8, it means that the type of the method is ACC_EXTENDED ; when the value of the flag is 0X4, it means that the type of the method is ACC_ABSTRACT; when the value of the flag is 0X2 (in the embodiment of the present invention, the flag of the method is defined as 0X2 to represent that the method needs to call NATIVE function to realize the characteristic value of the corresponding function), it means that the type of the method is ACC_NATIVE (that is, the method that the type is ACC_NATIVE is the method that needs to call the NATIVE function to realize the corresponding function in the embodiment of the present invention. For th...

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Abstract

The invention discloses a data processing method, a device and a system of a JAVA intelligent card so as to solve the problems of the prior art that a JAVA intelligent card takes long time and has quite low operation efficiency in processing CAP files. The method comprises the following steps that: a method in a program conversion package CAP file which needs to realize corresponding functions by transferring an NATIVE function is determined, and the method body of the method is set to be empty; the corresponding relationship between the NATIVE function and the method is configured; a method header is modified according to the corresponding relationship; and according to each determined method, the sign of the method header of the method is designed as the label information which expresses that the method transfers the characteristic calve of the NATIVE function and the corresponding NATIVE function that the method corresponds to is recorded in the method header of the method. The technical scheme of the invention reduces the time delay of the intelligent card in processing data, and improves the operation efficiency.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to a data processing method, device and system of a JAVA smart card. Background technique [0002] At present, the more commonly used smart cards are implemented in the JAVA language, which is subsequently referred to as a Java smart card. Generally speaking, an application program of a Java smart card realizes corresponding functions by calling API (Application Programming Interface, application programming interface) data packets. API class data packages (such as Java.io, Java.lang and other data packages) are mainly downloaded to the Java smart card in the format of a CAP (Converted Applet Package, program conversion package) file. The format of the CAP file is defined by the JCVM (Java Card Virtual Machine JAVA card virtual machine) specification of the Java smart card. An API class data package corresponds to a CAP file. A CAP file includes the following components: Header co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F9/44G06K19/07
Inventor 王卫霞刘承涛臧宏伟
Owner BEIJING WATCH DATA SYST
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