Regular expression generation and legality verification method and device for application system parameters

The embodiment of the invention provides a regular expression generation method of application system parameters and a legality verification method and device. When the regular expression is generated for the parameters of the application system, parameter values of all the parameters in all the method code blocks are obtained from historical application program implementation of the application system. And for each parameter in each method code block, extracting common information from the corresponding parameter value. Then, aiming at each parameter in each method code block, generating a corresponding regular expression according to the extracted common information; 本说明书的实施例提供应用系统参数的正则表达式生成方法和合法性校验方法及装置。在为应用系统的参数生成正则表达式时，从应用系统的历史应用程序实现中获取各个方法代码块中的各个参数的参数值。针对每个方法代码块中的各个参数，分别从对应的参数值中提取出共性信息。随后，针对各个方法代码块中的各个参数，分别根据所提取的共性信息生成对应的正则表达式。