URI ???? ??-? ????? ?? ??

??

URI(Uniform Resource Identifiers)? ??? ? ??-? ? ???? ???? ?????. Java?? C#/.NET HttpUtility.ParseQueryString ???? ???? ?? ???? ????. ??? ??? ?? ??? ???? ?? ???? ??? ??? ????.

??? ?? ?? ??

URI ???? Map?? ?? ???? ? ?? ??? ??? ?? ??? ???? ????. ???? ??? ??? ????.

public static Map<String, String> splitQuery(URL url) throws UnsupportedEncodingException {
    Map<String, String> queryPairs = new LinkedHashMap<>();
    String query = url.getQuery();
    String[] pairs = query.split("&");
    for (String pair : pairs) {
        int idx = pair.indexOf("=");
        queryPairs.put(URLDecoder.decode(pair.substring(0, idx), "UTF-8"), URLDecoder.decode(pair.substring(idx + 1), "UTF-8"));
    }
    return queryPairs;
}

URL ??? ? ?? ???? ??? ???? ??? ??

? ??? ??? ?? ???? ?? ????? ?? ?? ????? ????? ?????????. ??? ??? ??? ????.

public static Map<String, List<String>> splitQuery(URL url) throws UnsupportedEncodingException {
    final Map<String, List<String>> queryPairs = new LinkedHashMap<>();
    final String[] pairs = url.getQuery().split("&");
    for (String pair : pairs) {
        final int idx = pair.indexOf("=");
        final String key = idx > 0 ? URLDecoder.decode(pair.substring(0, idx), "UTF-8") : pair;
        if (!queryPairs.containsKey(key)) {
            queryPairs.put(key, new LinkedList<>());
        }
        final String value = idx > 0 && pair.length() > idx + 1 ? URLDecoder.decode(pair.substring(idx + 1), "UTF-8") : null;
        queryPairs.get(key).add(value);
    }
    return queryPairs;
}

Java 8 ??

??? Java 8 ??? ??????.

public Map<String, List<String>> splitQuery(URL url) {
    if (Strings.isNullOrEmpty(url.getQuery())) {
        return Collections.emptyMap();
    }
    return Arrays.stream(url.getQuery().split("&"))
            .map(this::splitQueryParameter)
            .collect(Collectors.groupingBy(SimpleImmutableEntry::getKey, LinkedHashMap::new, mapping(Map.Entry::getValue, toList())));
}

public SimpleImmutableEntry<String, String> splitQueryParameter(String it) {
    final int idx = it.indexOf("=");
    final String key = idx > 0 ? it.substring(0, idx) : it;
    final String value = idx > 0 && it.length() > idx + 1 ? it.substring(idx + 1) : null;
    return new SimpleImmutableEntry<>(URLDecoder.decode(key, StandardCharsets.UTF_8), URLDecoder.decode(value, StandardCharsets.UTF_8));
}

?? ?

To SplitQuery ???? ???? ??? URL ??? ???? ?? ??? ?? ???? ??? ?? ?????. ????:

URL url = new URL("https://google.com.ua/oauth/authorize?client_id=SS&response_type=code&scope=N_FULL&access_type=offline&redirect_uri=http://localhost/Callback");
Map<String, String> queryParameters = splitQuery(url);

??? ?? ????? ?? ?????.

String clientId = queryParameters.get("client_id"); // SS

? ??? Java?? URI ?? ???? ??-? ????? ?? ???? ??? ??????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!