Escape What it does. 寄义
\\ Backslash () 反斜杠
\' Single-quote (') 单引号
\" Double-quote (") 双引号
\a ASCII bell (BEL) 响铃符
\b ASCII backspace (BS) 退格符
\f ASCII formfeed (FF) 进纸符
\n ASCII linefeed (LF) 换行符
\N{name} Character named name in the Unicode database (Unicode only) Unicode数据库中的字符名；name就是它的名字
\r ASCII Carriage Return (CR) 回车符
\t ASCII Horizontal Tab (TAB) 程度制表符
\uxxxx Character with 16-bit hex value xxxx (Unicode only) 值为16位十六进制xxxx的字符
\Uxxxxxxxx Character with 32-bit hex value xxxxxxxx (Unicode only) 值为32位十六进制xxxx的字符
\v ASCII vertical tab (VT) 垂直制表符
\ooo Character with octal value ooo 值为八进制ooo的字符
\xhh Character with hex value hh 值为十六进制数hh的字符
