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Java regular expression learning summary and some small examples

高洛峰
Release: 2017-01-22 14:49:03
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昨天遇到一个小问题,需要批量处理一些用户,而前台传来的用户格式如下,要提取括号中间的内容(不带括号)

教师10(0010)
教师11(0011)
教师9(009)
教师12(0012)
教师13(0013)
教师14(0014)
  
本来想用java的String.split()和substring()来搞定,但是需要处理多次比较麻烦,就用正则表达式了。虽然语法忘得差不多了,但是印象中用断言比较方便(关键希望结果不带括号)。打开RegexBuddy试了下,轻松搞定:

Java 正则表达式学习总结和一些小例子

下边是java实现代码:

public List<String> getTeacherList(String managers){
        List<String> ls=new ArrayList<String>();
        Pattern pattern = Pattern.compile("(?<=\\()(.+?)(?=\\))");
        Matcher matcher = pattern.matcher(managers);
        while(matcher.find())
            ls.add(matcher.group());
        return ls;
    }
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最后附一下用到的零宽断言:

Java 正则表达式学习总结和一些小例子

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