正则表达式的几种字符判断（包括数字，字母组合等

“¹²[1-9][0-9]$$\begin{gathered} "//正整数{"}^{(}(- \\ d+)|(0+)) \end{gathered}$$”//非正整数（负整数 + 0）
“^-[0-9][1-9][0-9]$$\begin{gathered} "//负整数{"}^{-}? \\ d+ \end{gathered}$$”//整数
“^\d+(\.\d+)?$$\begin{gathered} "//非负浮点数（正浮点数+0）{"}^{(}([0-9]+ \\ .[0-9]\ast [1-9][0-9]\ast )|([0-9]\ast [1-9][0-9]\ast \\ .[0-9]+)|([0-9]\ast [1-9][0-9]\ast )) \end{gathered}$$”　
//正浮点数
“^((-\d+(\.\d+)?)|(0+(\.0+)?))$$\begin{gathered} "//非正浮点数（负浮点数+0）{"}^{(}-(([0-9]+ \\ .[0-9]\ast [1-9][0-9]\ast )|([0-9]\ast [1-9][0-9]\ast \\ .[0-9]+)|([0-9]\ast [1-9][0-9]\ast ))) \end{gathered}$$”　
//负浮点数
“^(-?\d+)(\.\d+)?$"//浮点数{"}^{[}A-Za-z]+$”//由26个英文字母组成的字符串
“¹³+$"//由26个英文字母的大写组成的字符串{"}^{[}a-z]+$”//由26个英文字母的小写组成的字符串
“¹⁴+KaTeX parse error: Got function '\newline' with no arguments as superscript at position 1: \̲n̲e̲w̲l̲i̲n̲e̲”//由数字、26个英文字母或者下划线组成的字符串
"¹⁵+(\.[\w-]+)@[\w-]+(\.[\w-]+)+$$\begin{gathered} "//email地址{"}^{[}a-zA-z]+://( \\ w+(- \\ w+)\ast )( \\ .( \\ w+(- \\ w+)\ast ))\ast ( \\ ? \\ S\ast )? \end{gathered}$$"//url
"¹⁶$"s
转至：/longzs/article/details/50923731?ops_request_misc=&request_id=&biz_id=102&utm_term=%E6%AD%A3%E5%88%99%E5%8C%B9%E9%85%8D%E6%95%B0%E5%AD%97%E5%AD%97%E6%AF%8D%E7%BB%84%E5%90%88&utm_medium=distribute.pc_search_result.none-task-blog-2allsobaiduweb~default-3-50923731.first_rank_v2_pc_rank_v29&spm=1018.2226.3001.4187