正則表達式-文字字符串和引號之間的匹配

Question

我在Regex感到很糟糕，非常感謝在此問題上提供的任何幫助，對於任何熟悉的人來說，我認為這都是新手。

我從REST呼叫中得到了這樣的響應

    {"responseData":{"translatedText":"Ciao mondo"},"responseDetails":"","responseStatus":200,"matches":[{"id":"424913311","segment":"Hello World","translation":"Ciao mondo","quality":"74","reference":"","usage-count":50,"subject":"All","created-by":"","last-updated-by":null,"create-date":"2011-12-29 19:14:22","last-update-date":"2011-12-29 19:14:22","match":1},{"id":"0","segment":"Hello World","translation":"Ciao a tutti","quality":"70","reference":"Machine Translation provided by Google, Microsoft, Worldlingo or the MyMemory customized engine.","usage-count":1,"subject":"All","created-by":"MT!","last-updated-by":null,"create-date":"2012-05-14","last-update-date":"2012-05-14","match":0.85}]}

我需要的是這些引號之間的“ Ciao mondo”。 我希望使用Java的Split功能可以做到這一點，但是不幸的是，它不允許兩個單獨的定界符，因為這樣我可以在翻譯之前指定文本。

為簡化起見，我堅持使用的是正則表達式，以收集介於TranslationText“：”和下一個“

我將非常感謝您的幫助

Answer 1

您可以使用\\"translatedText\\":\\"([^\\"]*)\\"表達式來捕獲匹配項。

表達式的含義如下：找到帶引號的translatedText后跟一個冒號和一個引號。 然后在下引號之前匹配每個字符，然后將結果捕獲到捕獲組中 。

String s = " {\"responseData\":{\"translatedText\":\"Ciao mondo\"},\"responseDetails\":\"\",\"responseStatus\":200,\"matches\":[{\"id\":\"424913311\",\"segment\":\"Hello World\",\"translation\":\"Ciao mondo\",\"quality\":\"74\",\"reference\":\"\",\"usage-count\":50,\"subject\":\"All\",\"created-by\":\"\",\"last-updated-by\":null,\"create-date\":\"2011-12-29 19:14:22\",\"last-update-date\":\"2011-12-29 19:14:22\",\"match\":1},{\"id\":\"0\",\"segment\":\"Hello World\",\"translation\":\"Ciao a tutti\",\"quality\":\"70\",\"reference\":\"Machine Translation provided by Google, Microsoft, Worldlingo or the MyMemory customized engine.\",\"usage-count\":1,\"subject\":\"All\",\"created-by\":\"MT!\",\"last-updated-by\":null,\"create-date\":\"2012-05-14\",\"last-update-date\":\"2012-05-14\",\"match\":0.85}]}";
System.out.println(s);
Pattern p = Pattern.compile("\"translatedText\":\"([^\"]*)\"");
Matcher m = p.matcher(s);
if (!m.find()) return;
System.out.println(m.group(1));

此片段打印Ciao mondo 。

Answer 2

使用前向和后向收集引號內的字符串：（？<= [，。{}：] \\“）。*？（？= \\”）

class Test
{
    public static void main(String[] args)
    {
        Scanner scanner = new Scanner(System.in);
        String in = scanner.nextLine();

        Matcher matcher = Pattern.compile("(?<=[,.{}:]\\\").*?(?=\\\")").matcher(in);

        while(matcher.find())
            System.out.println(matcher.group());
    }
}

Answer 3

試試這個正則表達式-

^.*translatedText":"([^"]*)"},"responseDetails".*$

匹配組將包含文本Ciao mondo。

假定TranslationText和responseDetails將始終出現在示例中指定的位置。