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正则表达式以匹配Java中的URL

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正则表达式以匹配Java中的URL

侃侃无极 2019-09-21 14:23:23

在使用正则表达式时,我使用RegexBuddy。我从其库中复制了正则表达式以匹配URL。我在RegexBuddy中成功测试。但是,当我将其复制为Java String样式并将其粘贴到Java代码中时,它将无法正常工作。以下类打印false:


public class RegexFoo {


    public static void main(String[] args) {

        String regex = "\\b(https?|ftp|file)://[-A-Z0-9+&@#/%?=~_|!:,.;]*[-A-Z0-9+&@#/%=~_|]";

        String text = "http://google.com";

        System.out.println(IsMatch(text,regex));

}


    private static boolean IsMatch(String s, String pattern) {

        try {

            Pattern patt = Pattern.compile(pattern);

            Matcher matcher = patt.matcher(s);

            return matcher.matches();

        } catch (RuntimeException e) {

        return false;

    }       

}   

}

有人知道我在做什么错吗?


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3 回答

?
慕容4345310

请尝试以下正则表达式字符串。您的测试可能以区分大小写的方式进行。我添加了小写字母Alpha以及正确的字符串开头占位符。


String regex = "^(https?|ftp|file)://[-a-zA-Z0-9+&@#/%?=~_|!:,.;]*[-a-zA-Z0-9+&@#/%=~_|]";

这也适用:


String regex = "\\b(https?|ftp|file)://[-a-zA-Z0-9+&@#/%?=~_|!:,.;]*[-a-zA-Z0-9+&@#/%=~_|]";

注意:


String regex = "<\\b(https?|ftp|file)://[-a-zA-Z0-9+&@#/%?=~_|!:,.;]*[-a-zA-Z0-9+&@#/%=~_|]>"; // matches <http://google.com>


String regex = "<^(https?|ftp|file)://[-a-zA-Z0-9+&@#/%?=~_|!:,.;]*[-a-zA-Z0-9+&@#/%=~_|]>"; // does not match <http://google.com>


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反对 回复 2019-09-21
?
慕丝7291255

现在最好的方法是:


android.util.Patterns.WEB_URL.matcher(linkUrl).matches();

编辑:Patterns来自https://github.com/android/platform_frameworks_base/blob/master/core/java/android/util/Patterns.java的代码:


/*

 * Copyright (C) 2007 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */


package android.util;


import java.util.regex.Matcher;

import java.util.regex.Pattern;


/**

 * Commonly used regular expression patterns.

 */

public class Patterns {

    /**

     *  Regular expression to match all IANA top-level domains.

     *  List accurate as of 2011/07/18.  List taken from:

     *  http://data.iana.org/TLD/tlds-alpha-by-domain.txt

     *  This pattern is auto-generated by frameworks/ex/common/tools/make-iana-tld-pattern.py

     *

     *  @deprecated Due to the recent profileration of gTLDs, this API is

     *  expected to become out-of-date very quickly. Therefore it is now

     *  deprecated.

     */

    @Deprecated

    public static final String TOP_LEVEL_DOMAIN_STR =

        "((aero|arpa|asia|a[cdefgilmnoqrstuwxz])"

        + "|(biz|b[abdefghijmnorstvwyz])"

        + "|(cat|com|coop|c[acdfghiklmnoruvxyz])"

        + "|d[ejkmoz]"

        + "|(edu|e[cegrstu])"

        + "|f[ijkmor]"

        + "|(gov|g[abdefghilmnpqrstuwy])"

        + "|h[kmnrtu]"

        + "|(info|int|i[delmnoqrst])"

        + "|(jobs|j[emop])"

        + "|k[eghimnprwyz]"

        + "|l[abcikrstuvy]"

        + "|(mil|mobi|museum|m[acdeghklmnopqrstuvwxyz])"

        + "|(name|net|n[acefgilopruz])"

        + "|(org|om)"

        + "|(pro|p[aefghklmnrstwy])"

        + "|qa"

        + "|r[eosuw]"

        + "|s[abcdeghijklmnortuvyz]"

        + "|(tel|travel|t[cdfghjklmnoprtvwz])"

        + "|u[agksyz]"

        + "|v[aceginu]"

        + "|w[fs]"

        + "|(\u03b4\u03bf\u03ba\u03b9\u03bc\u03ae|\u0438\u0441\u043f\u044b\u0442\u0430\u043d\u0438\u0435|\u0440\u0444|\u0441\u0440\u0431|\u05d8\u05e2\u05e1\u05d8|\u0622\u0632\u0645\u0627\u06cc\u0634\u06cc|\u0625\u062e\u062a\u0628\u0627\u0631|\u0627\u0644\u0627\u0631\u062f\u0646|\u0627\u0644\u062c\u0632\u0627\u0626\u0631|\u0627\u0644\u0633\u0639\u0648\u062f\u064a\u0629|\u0627\u0644\u0645\u063a\u0631\u0628|\u0627\u0645\u0627\u0631\u0627\u062a|\u0628\u06be\u0627\u0631\u062a|\u062a\u0648\u0646\u0633|\u0633\u0648\u0631\u064a\u0629|\u0641\u0644\u0633\u0637\u064a\u0646|\u0642\u0637\u0631|\u0645\u0635\u0631|\u092a\u0930\u0940\u0915\u094d\u0937\u093e|\u092d\u093e\u0930\u0924|\u09ad\u09be\u09b0\u09a4|\u0a2d\u0a3e\u0a30\u0a24|\u0aad\u0abe\u0ab0\u0aa4|\u0b87\u0ba8\u0bcd\u0ba4\u0bbf\u0baf\u0bbe|\u0b87\u0bb2\u0b99\u0bcd\u0b95\u0bc8|\u0b9a\u0bbf\u0b99\u0bcd\u0b95\u0baa\u0bcd\u0baa\u0bc2\u0bb0\u0bcd|\u0baa\u0bb0\u0bbf\u0b9f\u0bcd\u0b9a\u0bc8|\u0c2d\u0c3e\u0c30\u0c24\u0c4d|\u0dbd\u0d82\u0d9a\u0dcf|\u0e44\u0e17\u0e22|\u30c6\u30b9\u30c8|\u4e2d\u56fd|\u4e2d\u570b|\u53f0\u6e7e|\u53f0\u7063|\u65b0\u52a0\u5761|\u6d4b\u8bd5|\u6e2c\u8a66|\u9999\u6e2f|\ud14c\uc2a4\ud2b8|\ud55c\uad6d|xn\\-\\-0zwm56d|xn\\-\\-11b5bs3a9aj6g|xn\\-\\-3e0b707e|xn\\-\\-45brj9c|xn\\-\\-80akhbyknj4f|xn\\-\\-90a3ac|xn\\-\\-9t4b11yi5a|xn\\-\\-clchc0ea0b2g2a9gcd|xn\\-\\-deba0ad|xn\\-\\-fiqs8s|xn\\-\\-fiqz9s|xn\\-\\-fpcrj9c3d|xn\\-\\-fzc2c9e2c|xn\\-\\-g6w251d|xn\\-\\-gecrj9c|xn\\-\\-h2brj9c|xn\\-\\-hgbk6aj7f53bba|xn\\-\\-hlcj6aya9esc7a|xn\\-\\-j6w193g|xn\\-\\-jxalpdlp|xn\\-\\-kgbechtv|xn\\-\\-kprw13d|xn\\-\\-kpry57d|xn\\-\\-lgbbat1ad8j|xn\\-\\-mgbaam7a8h|xn\\-\\-mgbayh7gpa|xn\\-\\-mgbbh1a71e|xn\\-\\-mgbc0a9azcg|xn\\-\\-mgberp4a5d4ar|xn\\-\\-o3cw4h|xn\\-\\-ogbpf8fl|xn\\-\\-p1ai|xn\\-\\-pgbs0dh|xn\\-\\-s9brj9c|xn\\-\\-wgbh1c|xn\\-\\-wgbl6a|xn\\-\\-xkc2al3hye2a|xn\\-\\-xkc2dl3a5ee0h|xn\\-\\-yfro4i67o|xn\\-\\-ygbi2ammx|xn\\-\\-zckzah|xxx)"

        + "|y[et]"

        + "|z[amw])";


    /**

     *  Regular expression pattern to match all IANA top-level domains.

     *  @deprecated This API is deprecated. See {@link #TOP_LEVEL_DOMAIN_STR}.

     */

    @Deprecated

    public static final Pattern TOP_LEVEL_DOMAIN =

        Pattern.compile(TOP_LEVEL_DOMAIN_STR);


    /**

     *  Regular expression to match all IANA top-level domains for WEB_URL.

     *  List accurate as of 2011/07/18.  List taken from:

     *  http://data.iana.org/TLD/tlds-alpha-by-domain.txt

     *  This pattern is auto-generated by frameworks/ex/common/tools/make-iana-tld-pattern.py

     *

     *  @deprecated This API is deprecated. See {@link #TOP_LEVEL_DOMAIN_STR}.

     */

    @Deprecated

    public static final String TOP_LEVEL_DOMAIN_STR_FOR_WEB_URL =

        "(?:"

        + "(?:aero|arpa|asia|a[cdefgilmnoqrstuwxz])"

        + "|(?:biz|b[abdefghijmnorstvwyz])"

        + "|(?:cat|com|coop|c[acdfghiklmnoruvxyz])"

        + "|d[ejkmoz]"

        + "|(?:edu|e[cegrstu])"

        + "|f[ijkmor]"

        + "|(?:gov|g[abdefghilmnpqrstuwy])"

        + "|h[kmnrtu]"

        + "|(?:info|int|i[delmnoqrst])"

        + "|(?:jobs|j[emop])"

        + "|k[eghimnprwyz]"

        + "|l[abcikrstuvy]"

        + "|(?:mil|mobi|museum|m[acdeghklmnopqrstuvwxyz])"

        + "|(?:name|net|n[acefgilopruz])"

        + "|(?:org|om)"

        + "|(?:pro|p[aefghklmnrstwy])"

        + "|qa"

        + "|r[eosuw]"

        + "|s[abcdeghijklmnortuvyz]"

        + "|(?:tel|travel|t[cdfghjklmnoprtvwz])"

        + "|u[agksyz]"

        + "|v[aceginu]"

        + "|w[fs]"

        + "|(?:\u03b4\u03bf\u03ba\u03b9\u03bc\u03ae|\u0438\u0441\u043f\u044b\u0442\u0430\u043d\u0438\u0435|\u0440\u0444|\u0441\u0440\u0431|\u05d8\u05e2\u05e1\u05d8|\u0622\u0632\u0645\u0627\u06cc\u0634\u06cc|\u0625\u062e\u062a\u0628\u0627\u0631|\u0627\u0644\u0627\u0631\u062f\u0646|\u0627\u0644\u062c\u0632\u0627\u0626\u0631|\u0627\u0644\u0633\u0639\u0648\u062f\u064a\u0629|\u0627\u0644\u0645\u063a\u0631\u0628|\u0627\u0645\u0627\u0631\u0627\u062a|\u0628\u06be\u0627\u0631\u062a|\u062a\u0648\u0646\u0633|\u0633\u0648\u0631\u064a\u0629|\u0641\u0644\u0633\u0637\u064a\u0646|\u0642\u0637\u0631|\u0645\u0635\u0631|\u092a\u0930\u0940\u0915\u094d\u0937\u093e|\u092d\u093e\u0930\u0924|\u09ad\u09be\u09b0\u09a4|\u0a2d\u0a3e\u0a30\u0a24|\u0aad\u0abe\u0ab0\u0aa4|\u0b87\u0ba8\u0bcd\u0ba4\u0bbf\u0baf\u0bbe|\u0b87\u0bb2\u0b99\u0bcd\u0b95\u0bc8|\u0b9a\u0bbf\u0b99\u0bcd\u0b95\u0baa\u0bcd\u0baa\u0bc2\u0bb0\u0bcd|\u0baa\u0bb0\u0bbf\u0b9f\u0bcd\u0b9a\u0bc8|\u0c2d\u0c3e\u0c30\u0c24\u0c4d|\u0dbd\u0d82\u0d9a\u0dcf|\u0e44\u0e17\u0e22|\u30c6\u30b9\u30c8|\u4e2d\u56fd|\u4e2d\u570b|\u53f0\u6e7e|\u53f0\u7063|\u65b0\u52a0\u5761|\u6d4b\u8bd5|\u6e2c\u8a66|\u9999\u6e2f|\ud14c\uc2a4\ud2b8|\ud55c\uad6d|xn\\-\\-0zwm56d|xn\\-\\-11b5bs3a9aj6g|xn\\-\\-3e0b707e|xn\\-\\-45brj9c|xn\\-\\-80akhbyknj4f|xn\\-\\-90a3ac|xn\\-\\-9t4b11yi5a|xn\\-\\-clchc0ea0b2g2a9gcd|xn\\-\\-deba0ad|xn\\-\\-fiqs8s|xn\\-\\-fiqz9s|xn\\-\\-fpcrj9c3d|xn\\-\\-fzc2c9e2c|xn\\-\\-g6w251d|xn\\-\\-gecrj9c|xn\\-\\-h2brj9c|xn\\-\\-hgbk6aj7f53bba|xn\\-\\-hlcj6aya9esc7a|xn\\-\\-j6w193g|xn\\-\\-jxalpdlp|xn\\-\\-kgbechtv|xn\\-\\-kprw13d|xn\\-\\-kpry57d|xn\\-\\-lgbbat1ad8j|xn\\-\\-mgbaam7a8h|xn\\-\\-mgbayh7gpa|xn\\-\\-mgbbh1a71e|xn\\-\\-mgbc0a9azcg|xn\\-\\-mgberp4a5d4ar|xn\\-\\-o3cw4h|xn\\-\\-ogbpf8fl|xn\\-\\-p1ai|xn\\-\\-pgbs0dh|xn\\-\\-s9brj9c|xn\\-\\-wgbh1c|xn\\-\\-wgbl6a|xn\\-\\-xkc2al3hye2a|xn\\-\\-xkc2dl3a5ee0h|xn\\-\\-yfro4i67o|xn\\-\\-ygbi2ammx|xn\\-\\-zckzah|xxx)"

        + "|y[et]"

        + "|z[amw]))";


    /**

     * Good characters for Internationalized Resource Identifiers (IRI).

     * This comprises most common used Unicode characters allowed in IRI

     * as detailed in RFC 3987.

     * Specifically, those two byte Unicode characters are not included.

     */

    public static final String GOOD_IRI_CHAR =

        "a-zA-Z0-9\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF";


    public static final Pattern IP_ADDRESS

        = Pattern.compile(

            "((25[0-5]|2[0-4][0-9]|[0-1][0-9]{2}|[1-9][0-9]|[1-9])\\.(25[0-5]|2[0-4]"

            + "[0-9]|[0-1][0-9]{2}|[1-9][0-9]|[1-9]|0)\\.(25[0-5]|2[0-4][0-9]|[0-1]"

            + "[0-9]{2}|[1-9][0-9]|[1-9]|0)\\.(25[0-5]|2[0-4][0-9]|[0-1][0-9]{2}"

            + "|[1-9][0-9]|[0-9]))");


    /**

     * RFC 1035 Section 2.3.4 limits the labels to a maximum 63 octets.

     */

    private static final String IRI

        = "[" + GOOD_IRI_CHAR + "]([" + GOOD_IRI_CHAR + "\\-]{0,61}[" + GOOD_IRI_CHAR + "]){0,1}";


    private static final String GOOD_GTLD_CHAR =

        "a-zA-Z\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF";

    private static final String GTLD = "[" + GOOD_GTLD_CHAR + "]{2,63}";

    private static final String HOST_NAME = "(" + IRI + "\\.)+" + GTLD;


    public static final Pattern DOMAIN_NAME

        = Pattern.compile("(" + HOST_NAME + "|" + IP_ADDRESS + ")");


    /**

     *  Regular expression pattern to match most part of RFC 3987

     *  Internationalized URLs, aka IRIs.  Commonly used Unicode characters are

     *  added.

     */

    public static final Pattern WEB_URL = Pattern.compile(

        "((?:(http|https|Http|Https|rtsp|Rtsp):\\/\\/(?:(?:[a-zA-Z0-9\\$\\-\\_\\.\\+\\!\\*\\'\\(\\)"

        + "\\,\\;\\?\\&\\=]|(?:\\%[a-fA-F0-9]{2})){1,64}(?:\\:(?:[a-zA-Z0-9\\$\\-\\_"

        + "\\.\\+\\!\\*\\'\\(\\)\\,\\;\\?\\&\\=]|(?:\\%[a-fA-F0-9]{2})){1,25})?\\@)?)?"

        + "(?:" + DOMAIN_NAME + ")"

        + "(?:\\:\\d{1,5})?)" // plus option port number

        + "(\\/(?:(?:[" + GOOD_IRI_CHAR + "\\;\\/\\?\\:\\@\\&\\=\\#\\~"  // plus option query params

        + "\\-\\.\\+\\!\\*\\'\\(\\)\\,\\_])|(?:\\%[a-fA-F0-9]{2}))*)?"

        + "(?:\\b|$)"); // and finally, a word boundary or end of

                        // input.  This is to stop foo.sure from

                        // matching as foo.su


    public static final Pattern EMAIL_ADDRESS

        = Pattern.compile(

            "[a-zA-Z0-9\\+\\.\\_\\%\\-\\+]{1,256}" +

            "\\@" +

            "[a-zA-Z0-9][a-zA-Z0-9\\-]{0,64}" +

            "(" +

                "\\." +

                "[a-zA-Z0-9][a-zA-Z0-9\\-]{0,25}" +

            ")+"

        );


    /**

     * This pattern is intended for searching for things that look like they

     * might be phone numbers in arbitrary text, not for validating whether

     * something is in fact a phone number.  It will miss many things that

     * are legitimate phone numbers.

     *

     * <p> The pattern matches the following:

     * <ul>

     * <li>Optionally, a + sign followed immediately by one or more digits. Spaces, dots, or dashes

     * may follow.

     * <li>Optionally, sets of digits in parentheses, separated by spaces, dots, or dashes.

     * <li>A string starting and ending with a digit, containing digits, spaces, dots, and/or dashes.

     * </ul>

     */

    public static final Pattern PHONE

        = Pattern.compile(                      // sdd = space, dot, or dash

                "(\\+[0-9]+[\\- \\.]*)?"        // +<digits><sdd>*

                + "(\\([0-9]+\\)[\\- \\.]*)?"   // (<digits>)<sdd>*

                + "([0-9][0-9\\- \\.]+[0-9])"); // <digit><digit|sdd>+<digit>


    /**

     *  Convenience method to take all of the non-null matching groups in a

     *  regex Matcher and return them as a concatenated string.

     *

     *  @param matcher      The Matcher object from which grouped text will

     *                      be extracted

     *

     *  @return             A String comprising all of the non-null matched

     *                      groups concatenated together

     */

    public static final String concatGroups(Matcher matcher) {

        StringBuilder b = new StringBuilder();

        final int numGroups = matcher.groupCount();


        for (int i = 1; i <= numGroups; i++) {

            String s = matcher.group(i);


            if (s != null) {

                b.append(s);

            }

        }


        return b.toString();

    }


    /**

     * Convenience method to return only the digits and plus signs

     * in the matching string.

     *

     * @param matcher      The Matcher object from which digits and plus will

     *                     be extracted

     *

     * @return             A String comprising all of the digits and plus in

     *                     the match

     */

    public static final String digitsAndPlusOnly(Matcher matcher) {

        StringBuilder buffer = new StringBuilder();

        String matchingRegion = matcher.group();


        for (int i = 0, size = matchingRegion.length(); i < size; i++) {

            char character = matchingRegion.charAt(i);


            if (character == '+' || Character.isDigit(character)) {

                buffer.append(character);

            }

        }

        return buffer.toString();

    }


    /**

     * Do not create this static utility class.

     */

    private Patterns() {}

}



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反对 回复 2019-09-21
?
慕田峪4524236

我将尝试一个标准的“您为什么要这样做?” 答案...您知道java.net.URL吗?


URL url = new URL(stringURL);

MalformedURLException如果无法解析网址,则上面的代码将引发一个。


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反对 回复 2019-09-21

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