正则表达式提取数字，空格和＆amp;来自字符串的分数

Question

我阅读和阅读困难写正则表达式，我想从以下字符串中提取数字，空格和分数：

给定字符串： 5 1/2

预期结果： root@ubuntu:/home/gimenes/Downloads/qt-everywhere-opensource-src-4.7.0# make configure /home/gimenes/Downloads/qt-everywhere-opensource-src-4.7.0/bin/qmake -spec mkspecs/linux-g++-64 -o Makefile projects.pro make: /home/gimenes/Downloads/qt-everywhere-opensource-src-4.7.0/bin/qmake: Command not found Makefile:1063: recipe for target 'Makefile' failed make: *** [Makefile] Error 127 root@ubuntu:/home/gimenes/Downloads/qt-everywhere-opensource-src-4.7.0# make /home/gimenes/Downloads/qt-everywhere-opensource-src-4.7.0/bin/qmake -spec mkspecs/linux-g++-64 -o Makefile projects.pro make: /home/gimenes/Downloads/qt-everywhere-opensource-src-4.7.0/bin/qmake: Command not found Makefile:1063: recipe for target 'Makefile' failed make: *** [Makefile] Error 127 。

我应该使用什么正则表达式？

Answer 1

试试这个正则表达式：

\b\d+\s+\d+\/\d+\b

Click for Demo

<强>解释

• \b - Word-boundary
• \d+ - 匹配1+位数
• \s+ - 匹配1 +空格
• \d+\/\d+ - 匹配1位数后跟/后跟1位数字
• \b - 字边界