正則表達式無法從較大的字符串中提取日期

Question

Matcher m = Pattern.compile("\\d{1,2} years \\d months|\\d{1,2} years|"
                + "\\d{1,2}-\\d{1,2}-\\d{2,4}\\s+to\\s+\\d{1,2}-\\d{1,2}-\\d{2,4}").matcher(resume);

while (m.find()){
    experience = m.group();
}

它適用於較小的字符串，但在這里我需要確定resume.i中提到的日期。

Answer 1

如果需要將這些日期與所應用的任何格式進行匹配，則需要在正則表達式中考慮更多的空格和其他任何文本：

Matcher m = Pattern.compile(
  "^.*?" + // Start of line, then anything, non-greedy.
  "(?:" + // Non-capturing group
  "\\d{1,2}\\s*years(?:[,\\s]*\\d{1,2}\\s*months)?|" + // Years with optional months
  "\\d{1,2}\\s*[\\-/]{1}\\d{1,2}\\s*[\\-/]{1}\\d{2,4}\\s*to\\s*" + // From to To, 1/2
  "\\d{1,2}\\s*[\\-/]{1}\\d{1,2}\\s*[\\-/]{1}\\d{2,4}" + // From to To 2/2
  ")" + // Non-capturing group closes
  ".*$" // Anything else up to the end of the line
).matcher("");

如果您需要使用正則表達式來匹配行，則必須向Matcher行：

BufferedReader reader = new BufferedReader(new StringReader(resume));
String line;
while ((line = reader.readLine()) != null) {
  if (matcher.reset(line).matches()) {
    experience = matcher.group();
  }
}

示例匹配：

" 5 years"
"12 years, 10 months."
"  10/12/2010 to 3/2/12: Blah"

希望這可以幫助！