单独提取spring ant 路径校验风格代码

港控/mmm° 2024-04-19 11:45 53阅读 0赞

import java.util.Comparator;
    import java.util.LinkedHashMap;
    import java.util.LinkedList;
    import java.util.List;
    import java.util.Map;
    import java.util.concurrent.ConcurrentHashMap;
    import java.util.regex.Matcher;
    import java.util.regex.Pattern;
    
    public class AntPathMatcher {
    
    	/** Default path separator: "/". */
    	public static final String DEFAULT_PATH_SEPARATOR = "/";
    
    	private static final int CACHE_TURNOFF_THRESHOLD = 65536;
    
    	private static final Pattern VARIABLE_PATTERN = Pattern.compile("\\{[^/]+?\\}");
    
    	private static final char[] WILDCARD_CHARS = { '*', '?', '{' };
    
    
    	private String pathSeparator;
    
    	private PathSeparatorPatternCache pathSeparatorPatternCache;
    
    	private boolean caseSensitive = true;
    
    	private boolean trimTokens = false;
    
    	
    	private volatile Boolean cachePatterns;
    
    	private final Map<String, String[]> tokenizedPatternCache = new ConcurrentHashMap<>(256);
    
    	final Map<String, AntPathStringMatcher> stringMatcherCache = new ConcurrentHashMap<>(256);
    
    
    	/**
    	 * Create a new instance with the {@link #DEFAULT_PATH_SEPARATOR}.
    	 */
    	public AntPathMatcher() {
    		this.pathSeparator = DEFAULT_PATH_SEPARATOR;
    		this.pathSeparatorPatternCache = new PathSeparatorPatternCache(DEFAULT_PATH_SEPARATOR);
    	}
    
    
    
    	/**
    	 * Set the path separator to use for pattern parsing.
    	 * <p>Default is "/", as in Ant.
    	 */
    	public void setPathSeparator( String pathSeparator) {
    		this.pathSeparator = (pathSeparator != null ? pathSeparator : DEFAULT_PATH_SEPARATOR);
    		this.pathSeparatorPatternCache = new PathSeparatorPatternCache(this.pathSeparator);
    	}
    
    	/**
    	 * Specify whether to perform pattern matching in a case-sensitive fashion.
    	 * <p>Default is {@code true}. Switch this to {@code false} for case-insensitive matching.
    	 * @since 4.2
    	 */
    	public void setCaseSensitive(boolean caseSensitive) {
    		this.caseSensitive = caseSensitive;
    	}
    
    	/**
    	 * Specify whether to trim tokenized paths and patterns.
    	 * <p>Default is {@code false}.
    	 */
    	public void setTrimTokens(boolean trimTokens) {
    		this.trimTokens = trimTokens;
    	}
    
    	/**
    	 * Specify whether to cache parsed pattern metadata for patterns passed
    	 * into this matcher's {@link #match} method. A value of {@code true}
    	 * activates an unlimited pattern cache; a value of {@code false} turns
    	 * the pattern cache off completely.
    	 * <p>Default is for the cache to be on, but with the variant to automatically
    	 * turn it off when encountering too many patterns to cache at runtime
    	 * (the threshold is 65536), assuming that arbitrary permutations of patterns
    	 * are coming in, with little chance for encountering a recurring pattern.
    	 * @since 4.0.1
    	 * @see #getStringMatcher(String)
    	 */
    	public void setCachePatterns(boolean cachePatterns) {
    		this.cachePatterns = cachePatterns;
    	}
    
    	private void deactivatePatternCache() {
    		this.cachePatterns = false;
    		this.tokenizedPatternCache.clear();
    		this.stringMatcherCache.clear();
    	}
    
    	public boolean isPattern(String path) {
    		return (path.indexOf('*') != -1 || path.indexOf('?') != -1);
    	}
    
    	public boolean match(String pattern, String path) {
    		return doMatch(pattern, path, true, null);
    	}
    
    	public boolean matchStart(String pattern, String path) {
    		return doMatch(pattern, path, false, null);
    	}
    
    	/**
    	 * Actually match the given {@code path} against the given {@code pattern}.
    	 * @param pattern the pattern to match against
    	 * @param path the path String to test
    	 * @param fullMatch whether a full pattern match is required (else a pattern match
    	 * as far as the given base path goes is sufficient)
    	 * @return {@code true} if the supplied {@code path} matched, {@code false} if it didn't
    	 */
    	protected boolean doMatch(String pattern, String path, boolean fullMatch,
    	 Map<String, String> uriTemplateVariables) {
    
    		if (path.startsWith(this.pathSeparator) != pattern.startsWith(this.pathSeparator)) {
    			return false;
    		}
    
    		String[] pattDirs = tokenizePattern(pattern);
    		if (fullMatch && this.caseSensitive && !isPotentialMatch(path, pattDirs)) {
    			return false;
    		}
    
    		String[] pathDirs = tokenizePath(path);
    
    		int pattIdxStart = 0;
    		int pattIdxEnd = pattDirs.length - 1;
    		int pathIdxStart = 0;
    		int pathIdxEnd = pathDirs.length - 1;
    
    		// Match all elements up to the first **
    		while (pattIdxStart <= pattIdxEnd && pathIdxStart <= pathIdxEnd) {
    			String pattDir = pattDirs[pattIdxStart];
    			if ("**".equals(pattDir)) {
    				break;
    			}
    			if (!matchStrings(pattDir, pathDirs[pathIdxStart], uriTemplateVariables)) {
    				return false;
    			}
    			pattIdxStart++;
    			pathIdxStart++;
    		}
    
    		if (pathIdxStart > pathIdxEnd) {
    			// Path is exhausted, only match if rest of pattern is * or **'s
    			if (pattIdxStart > pattIdxEnd) {
    				return (pattern.endsWith(this.pathSeparator) == path.endsWith(this.pathSeparator));
    			}
    			if (!fullMatch) {
    				return true;
    			}
    			if (pattIdxStart == pattIdxEnd && pattDirs[pattIdxStart].equals("*") && path.endsWith(this.pathSeparator)) {
    				return true;
    			}
    			for (int i = pattIdxStart; i <= pattIdxEnd; i++) {
    				if (!pattDirs[i].equals("**")) {
    					return false;
    				}
    			}
    			return true;
    		}
    		else if (pattIdxStart > pattIdxEnd) {
    			// String not exhausted, but pattern is. Failure.
    			return false;
    		}
    		else if (!fullMatch && "**".equals(pattDirs[pattIdxStart])) {
    			// Path start definitely matches due to "**" part in pattern.
    			return true;
    		}
    
    		// up to last '**'
    		while (pattIdxStart <= pattIdxEnd && pathIdxStart <= pathIdxEnd) {
    			String pattDir = pattDirs[pattIdxEnd];
    			if (pattDir.equals("**")) {
    				break;
    			}
    			if (!matchStrings(pattDir, pathDirs[pathIdxEnd], uriTemplateVariables)) {
    				return false;
    			}
    			pattIdxEnd--;
    			pathIdxEnd--;
    		}
    		if (pathIdxStart > pathIdxEnd) {
    			// String is exhausted
    			for (int i = pattIdxStart; i <= pattIdxEnd; i++) {
    				if (!pattDirs[i].equals("**")) {
    					return false;
    				}
    			}
    			return true;
    		}
    
    		while (pattIdxStart != pattIdxEnd && pathIdxStart <= pathIdxEnd) {
    			int patIdxTmp = -1;
    			for (int i = pattIdxStart + 1; i <= pattIdxEnd; i++) {
    				if (pattDirs[i].equals("**")) {
    					patIdxTmp = i;
    					break;
    				}
    			}
    			if (patIdxTmp == pattIdxStart + 1) {
    				// '**/**' situation, so skip one
    				pattIdxStart++;
    				continue;
    			}
    			// Find the pattern between padIdxStart & padIdxTmp in str between
    			// strIdxStart & strIdxEnd
    			int patLength = (patIdxTmp - pattIdxStart - 1);
    			int strLength = (pathIdxEnd - pathIdxStart + 1);
    			int foundIdx = -1;
    
    			strLoop:
    			for (int i = 0; i <= strLength - patLength; i++) {
    				for (int j = 0; j < patLength; j++) {
    					String subPat = pattDirs[pattIdxStart + j + 1];
    					String subStr = pathDirs[pathIdxStart + i + j];
    					if (!matchStrings(subPat, subStr, uriTemplateVariables)) {
    						continue strLoop;
    					}
    				}
    				foundIdx = pathIdxStart + i;
    				break;
    			}
    
    			if (foundIdx == -1) {
    				return false;
    			}
    
    			pattIdxStart = patIdxTmp;
    			pathIdxStart = foundIdx + patLength;
    		}
    
    		for (int i = pattIdxStart; i <= pattIdxEnd; i++) {
    			if (!pattDirs[i].equals("**")) {
    				return false;
    			}
    		}
    
    		return true;
    	}
    
    	private boolean isPotentialMatch(String path, String[] pattDirs) {
    		if (!this.trimTokens) {
    			int pos = 0;
    			for (String pattDir : pattDirs) {
    				int skipped = skipSeparator(path, pos, this.pathSeparator);
    				pos += skipped;
    				skipped = skipSegment(path, pos, pattDir);
    				if (skipped < pattDir.length()) {
    					return (skipped > 0 || (pattDir.length() > 0 && isWildcardChar(pattDir.charAt(0))));
    				}
    				pos += skipped;
    			}
    		}
    		return true;
    	}
    
    	private int skipSegment(String path, int pos, String prefix) {
    		int skipped = 0;
    		for (int i = 0; i < prefix.length(); i++) {
    			char c = prefix.charAt(i);
    			if (isWildcardChar(c)) {
    				return skipped;
    			}
    			int currPos = pos + skipped;
    			if (currPos >= path.length()) {
    				return 0;
    			}
    			if (c == path.charAt(currPos)) {
    				skipped++;
    			}
    		}
    		return skipped;
    	}
    
    	private int skipSeparator(String path, int pos, String separator) {
    		int skipped = 0;
    		while (path.startsWith(separator, pos + skipped)) {
    			skipped += separator.length();
    		}
    		return skipped;
    	}
    
    	private boolean isWildcardChar(char c) {
    		for (char candidate : WILDCARD_CHARS) {
    			if (c == candidate) {
    				return true;
    			}
    		}
    		return false;
    	}
    
    	/**
    	 * Tokenize the given path pattern into parts, based on this matcher's settings.
    	 * <p>Performs caching based on {@link #setCachePatterns}, delegating to
    	 * {@link #tokenizePath(String)} for the actual tokenization algorithm.
    	 * @param pattern the pattern to tokenize
    	 * @return the tokenized pattern parts
    	 */
    	protected String[] tokenizePattern(String pattern) {
    		String[] tokenized = null;
    		Boolean cachePatterns = this.cachePatterns;
    		if (cachePatterns == null || cachePatterns.booleanValue()) {
    			tokenized = this.tokenizedPatternCache.get(pattern);
    		}
    		if (tokenized == null) {
    			tokenized = tokenizePath(pattern);
    			if (cachePatterns == null && this.tokenizedPatternCache.size() >= CACHE_TURNOFF_THRESHOLD) {
    				// Try to adapt to the runtime situation that we're encountering:
    				// There are obviously too many different patterns coming in here...
    				// So let's turn off the cache since the patterns are unlikely to be reoccurring.
    				deactivatePatternCache();
    				return tokenized;
    			}
    			if (cachePatterns == null || cachePatterns.booleanValue()) {
    				this.tokenizedPatternCache.put(pattern, tokenized);
    			}
    		}
    		return tokenized;
    	}
    
    	/**
    	 * Tokenize the given path String into parts, based on this matcher's settings.
    	 * @param path the path to tokenize
    	 * @return the tokenized path parts
    	 */
    	protected String[] tokenizePath(String path) {
    		return StringUtils.tokenizeToStringArray(path, this.pathSeparator, this.trimTokens, true);
    	}
    
    	/**
    	 * Test whether or not a string matches against a pattern.
    	 * @param pattern the pattern to match against (never {@code null})
    	 * @param str the String which must be matched against the pattern (never {@code null})
    	 * @return {@code true} if the string matches against the pattern, or {@code false} otherwise
    	 */
    	private boolean matchStrings(String pattern, String str,
    	 Map<String, String> uriTemplateVariables) {
    
    		return getStringMatcher(pattern).matchStrings(str, uriTemplateVariables);
    	}
    
    	/**
    	 * Build or retrieve an {@link AntPathStringMatcher} for the given pattern.
    	 * <p>The default implementation checks this AntPathMatcher's internal cache
    	 * (see {@link #setCachePatterns}), creating a new AntPathStringMatcher instance
    	 * if no cached copy is found.
    	 * <p>When encountering too many patterns to cache at runtime (the threshold is 65536),
    	 * it turns the default cache off, assuming that arbitrary permutations of patterns
    	 * are coming in, with little chance for encountering a recurring pattern.
    	 * <p>This method may be overridden to implement a custom cache strategy.
    	 * @param pattern the pattern to match against (never {@code null})
    	 * @return a corresponding AntPathStringMatcher (never {@code null})
    	 * @see #setCachePatterns
    	 */
    	protected AntPathStringMatcher getStringMatcher(String pattern) {
    		AntPathStringMatcher matcher = null;
    		Boolean cachePatterns = this.cachePatterns;
    		if (cachePatterns == null || cachePatterns.booleanValue()) {
    			matcher = this.stringMatcherCache.get(pattern);
    		}
    		if (matcher == null) {
    			matcher = new AntPathStringMatcher(pattern, this.caseSensitive);
    			if (cachePatterns == null && this.stringMatcherCache.size() >= CACHE_TURNOFF_THRESHOLD) {
    				// Try to adapt to the runtime situation that we're encountering:
    				// There are obviously too many different patterns coming in here...
    				// So let's turn off the cache since the patterns are unlikely to be reoccurring.
    				deactivatePatternCache();
    				return matcher;
    			}
    			if (cachePatterns == null || cachePatterns.booleanValue()) {
    				this.stringMatcherCache.put(pattern, matcher);
    			}
    		}
    		return matcher;
    	}
    
    	/**
    	 * Given a pattern and a full path, determine the pattern-mapped part. <p>For example: <ul>
    	 * <li>'{@code /docs/cvs/commit.html}' and '{@code /docs/cvs/commit.html} -> ''</li>
    	 * <li>'{@code /docs/*}' and '{@code /docs/cvs/commit} -> '{@code cvs/commit}'</li>
    	 * <li>'{@code /docs/cvs/*.html}' and '{@code /docs/cvs/commit.html} -> '{@code commit.html}'</li>
    	 * <li>'{@code /docs/**}' and '{@code /docs/cvs/commit} -> '{@code cvs/commit}'</li>
    	 * <li>'{@code /docs/**\/*.html}' and '{@code /docs/cvs/commit.html} -> '{@code cvs/commit.html}'</li>
    	 * <li>'{@code /*.html}' and '{@code /docs/cvs/commit.html} -> '{@code docs/cvs/commit.html}'</li>
    	 * <li>'{@code *.html}' and '{@code /docs/cvs/commit.html} -> '{@code /docs/cvs/commit.html}'</li>
    	 * <li>'{@code *}' and '{@code /docs/cvs/commit.html} -> '{@code /docs/cvs/commit.html}'</li> </ul>
    	 * <p>Assumes that {@link #match} returns {@code true} for '{@code pattern}' and '{@code path}', but
    	 * does <strong>not</strong> enforce this.
    	 */
    	public String extractPathWithinPattern(String pattern, String path) {
    		String[] patternParts = StringUtils.tokenizeToStringArray(pattern, this.pathSeparator, this.trimTokens, true);
    		String[] pathParts = StringUtils.tokenizeToStringArray(path, this.pathSeparator, this.trimTokens, true);
    		StringBuilder builder = new StringBuilder();
    		boolean pathStarted = false;
    
    		for (int segment = 0; segment < patternParts.length; segment++) {
    			String patternPart = patternParts[segment];
    			if (patternPart.indexOf('*') > -1 || patternPart.indexOf('?') > -1) {
    				for (; segment < pathParts.length; segment++) {
    					if (pathStarted || (segment == 0 && !pattern.startsWith(this.pathSeparator))) {
    						builder.append(this.pathSeparator);
    					}
    					builder.append(pathParts[segment]);
    					pathStarted = true;
    				}
    			}
    		}
    
    		return builder.toString();
    	}
    
    	
    	public Map<String, String> extractUriTemplateVariables(String pattern, String path) {
    		Map<String, String> variables = new LinkedHashMap<>();
    		boolean result = doMatch(pattern, path, true, variables);
    		if (!result) {
    			throw new IllegalStateException("Pattern \"" + pattern + "\" is not a match for \"" + path + "\"");
    		}
    		return variables;
    	}
    
    	/**
    	 * Combine two patterns into a new pattern.
    	 * <p>This implementation simply concatenates the two patterns, unless
    	 * the first pattern contains a file extension match (e.g., {@code *.html}).
    	 * In that case, the second pattern will be merged into the first. Otherwise,
    	 * an {@code IllegalArgumentException} will be thrown.
    	 * <h3>Examples</h3>
    	 * <table border="1">
    	 * <tr><th>Pattern 1</th><th>Pattern 2</th><th>Result</th></tr>
    	 * <tr><td>{@code null}</td><td>{@code null}</td><td> </td></tr>
    	 * <tr><td>/hotels</td><td>{@code null}</td><td>/hotels</td></tr>
    	 * <tr><td>{@code null}</td><td>/hotels</td><td>/hotels</td></tr>
    	 * <tr><td>/hotels</td><td>/bookings</td><td>/hotels/bookings</td></tr>
    	 * <tr><td>/hotels</td><td>bookings</td><td>/hotels/bookings</td></tr>
    	 * <tr><td>/hotels/*</td><td>/bookings</td><td>/hotels/bookings</td></tr>
    	 * <tr><td>/hotels/**</td><td>/bookings</td><td>/hotels/**/bookings</td></tr>
    	 * <tr><td>/hotels</td><td>{hotel}</td><td>/hotels/{hotel}</td></tr>
    	 * <tr><td>/hotels/*</td><td>{hotel}</td><td>/hotels/{hotel}</td></tr>
    	 * <tr><td>/hotels/**</td><td>{hotel}</td><td>/hotels/**/{hotel}</td></tr>
    	 * <tr><td>/*.html</td><td>/hotels.html</td><td>/hotels.html</td></tr>
    	 * <tr><td>/*.html</td><td>/hotels</td><td>/hotels.html</td></tr>
    	 * <tr><td>/*.html</td><td>/*.txt</td><td>{@code IllegalArgumentException}</td></tr>
    	 * </table>
    	 * @param pattern1 the first pattern
    	 * @param pattern2 the second pattern
    	 * @return the combination of the two patterns
    	 * @throws IllegalArgumentException if the two patterns cannot be combined
    	 */
    	
    	public String combine(String pattern1, String pattern2) {
    		if (!StringUtils.hasText(pattern1) && !StringUtils.hasText(pattern2)) {
    			return "";
    		}
    		if (!StringUtils.hasText(pattern1)) {
    			return pattern2;
    		}
    		if (!StringUtils.hasText(pattern2)) {
    			return pattern1;
    		}
    
    		boolean pattern1ContainsUriVar = (pattern1.indexOf('{') != -1);
    		if (!pattern1.equals(pattern2) && !pattern1ContainsUriVar && match(pattern1, pattern2)) {
    			// /* + /hotel -> /hotel ; "/*.*" + "/*.html" -> /*.html
    			// However /user + /user -> /usr/user ; /{foo} + /bar -> /{foo}/bar
    			return pattern2;
    		}
    
    		// /hotels/* + /booking -> /hotels/booking
    		// /hotels/* + booking -> /hotels/booking
    		if (pattern1.endsWith(this.pathSeparatorPatternCache.getEndsOnWildCard())) {
    			return concat(pattern1.substring(0, pattern1.length() - 2), pattern2);
    		}
    
    		// /hotels/** + /booking -> /hotels/**/booking
    		// /hotels/** + booking -> /hotels/**/booking
    		if (pattern1.endsWith(this.pathSeparatorPatternCache.getEndsOnDoubleWildCard())) {
    			return concat(pattern1, pattern2);
    		}
    
    		int starDotPos1 = pattern1.indexOf("*.");
    		if (pattern1ContainsUriVar || starDotPos1 == -1 || this.pathSeparator.equals(".")) {
    			// simply concatenate the two patterns
    			return concat(pattern1, pattern2);
    		}
    
    		String ext1 = pattern1.substring(starDotPos1 + 1);
    		int dotPos2 = pattern2.indexOf('.');
    		String file2 = (dotPos2 == -1 ? pattern2 : pattern2.substring(0, dotPos2));
    		String ext2 = (dotPos2 == -1 ? "" : pattern2.substring(dotPos2));
    		boolean ext1All = (ext1.equals(".*") || ext1.isEmpty());
    		boolean ext2All = (ext2.equals(".*") || ext2.isEmpty());
    		if (!ext1All && !ext2All) {
    			throw new IllegalArgumentException("Cannot combine patterns: " + pattern1 + " vs " + pattern2);
    		}
    		String ext = (ext1All ? ext2 : ext1);
    		return file2 + ext;
    	}
    
    	private String concat(String path1, String path2) {
    		boolean path1EndsWithSeparator = path1.endsWith(this.pathSeparator);
    		boolean path2StartsWithSeparator = path2.startsWith(this.pathSeparator);
    
    		if (path1EndsWithSeparator && path2StartsWithSeparator) {
    			return path1 + path2.substring(1);
    		}
    		else if (path1EndsWithSeparator || path2StartsWithSeparator) {
    			return path1 + path2;
    		}
    		else {
    			return path1 + this.pathSeparator + path2;
    		}
    	}
    
    	/**
    	 * Given a full path, returns a {@link Comparator} suitable for sorting patterns in order of
    	 * explicitness.
    	 * <p>This{@code Comparator} will {@linkplain java.util.List#sort(Comparator) sort}
    	 * a list so that more specific patterns (without uri templates or wild cards) come before
    	 * generic patterns. So given a list with the following patterns:
    	 * <ol>
    	 * <li>{@code /hotels/new}</li>
    	 * <li>{@code /hotels/{hotel}}</li> <li>{@code /hotels/*}</li>
    	 * </ol>
    	 * the returned comparator will sort this list so that the order will be as indicated.
    	 * <p>The full path given as parameter is used to test for exact matches. So when the given path
    	 * is {@code /hotels/2}, the pattern {@code /hotels/2} will be sorted before {@code /hotels/1}.
    	 * @param path the full path to use for comparison
    	 * @return a comparator capable of sorting patterns in order of explicitness
    	 */
    	
    	public Comparator<String> getPatternComparator(String path) {
    		return new AntPatternComparator(path);
    	}
    
    
    	/**
    	 * Tests whether or not a string matches against a pattern via a {@link Pattern}.
    	 * <p>The pattern may contain special characters: '*' means zero or more characters; '?' means one and
    	 * only one character; '{' and '}' indicate a URI template pattern. For example <tt>/users/{user}</tt>.
    	 */
    	protected static class AntPathStringMatcher {
    
    		private static final Pattern GLOB_PATTERN = Pattern.compile("\\?|\\*|\\{((?:\\{[^/]+?\\}|[^/{}]|\\\\[{}])+?)\\}");
    
    		private static final String DEFAULT_VARIABLE_PATTERN = "(.*)";
    
    		private final Pattern pattern;
    
    		private final List<String> variableNames = new LinkedList<>();
    
    		public AntPathStringMatcher(String pattern) {
    			this(pattern, true);
    		}
    
    		public AntPathStringMatcher(String pattern, boolean caseSensitive) {
    			StringBuilder patternBuilder = new StringBuilder();
    			Matcher matcher = GLOB_PATTERN.matcher(pattern);
    			int end = 0;
    			while (matcher.find()) {
    				patternBuilder.append(quote(pattern, end, matcher.start()));
    				String match = matcher.group();
    				if ("?".equals(match)) {
    					patternBuilder.append('.');
    				}
    				else if ("*".equals(match)) {
    					patternBuilder.append(".*");
    				}
    				else if (match.startsWith("{") && match.endsWith("}")) {
    					int colonIdx = match.indexOf(':');
    					if (colonIdx == -1) {
    						patternBuilder.append(DEFAULT_VARIABLE_PATTERN);
    						this.variableNames.add(matcher.group(1));
    					}
    					else {
    						String variablePattern = match.substring(colonIdx + 1, match.length() - 1);
    						patternBuilder.append('(');
    						patternBuilder.append(variablePattern);
    						patternBuilder.append(')');
    						String variableName = match.substring(1, colonIdx);
    						this.variableNames.add(variableName);
    					}
    				}
    				end = matcher.end();
    			}
    			patternBuilder.append(quote(pattern, end, pattern.length()));
    			this.pattern = (caseSensitive ? Pattern.compile(patternBuilder.toString()) :
    					Pattern.compile(patternBuilder.toString(), Pattern.CASE_INSENSITIVE));
    		}
    
    		private String quote(String s, int start, int end) {
    			if (start == end) {
    				return "";
    			}
    			return Pattern.quote(s.substring(start, end));
    		}
    
    		/**
    		 * Main entry point.
    		 * @return {@code true} if the string matches against the pattern, or {@code false} otherwise.
    		 */
    		public boolean matchStrings(String str,  Map<String, String> uriTemplateVariables) {
    			Matcher matcher = this.pattern.matcher(str);
    			if (matcher.matches()) {
    				if (uriTemplateVariables != null) {
    					// SPR-8455
    					if (this.variableNames.size() != matcher.groupCount()) {
    						throw new IllegalArgumentException("The number of capturing groups in the pattern segment " +
    								this.pattern + " does not match the number of URI template variables it defines, " +
    								"which can occur if capturing groups are used in a URI template regex. " +
    								"Use non-capturing groups instead.");
    					}
    					for (int i = 1; i <= matcher.groupCount(); i++) {
    						String name = this.variableNames.get(i - 1);
    						String value = matcher.group(i);
    						uriTemplateVariables.put(name, value);
    					}
    				}
    				return true;
    			}
    			else {
    				return false;
    			}
    		}
    	}
    
    
    	/**
    	 * The default {@link Comparator} implementation returned by
    	 * {@link #getPatternComparator(String)}.
    	 * <p>In order, the most "generic" pattern is determined by the following:
    	 * <ul>
    	 * <li>if it's null or a capture all pattern (i.e. it is equal to "/**")</li>
    	 * <li>if the other pattern is an actual match</li>
    	 * <li>if it's a catch-all pattern (i.e. it ends with "**"</li>
    	 * <li>if it's got more "*" than the other pattern</li>
    	 * <li>if it's got more "{foo}" than the other pattern</li>
    	 * <li>if it's shorter than the other pattern</li>
    	 * </ul>
    	 */
    	protected static class AntPatternComparator implements Comparator<String> {
    
    		private final String path;
    
    		public AntPatternComparator(String path) {
    			this.path = path;
    		}
    
    		/**
    		 * Compare two patterns to determine which should match first, i.e. which
    		 * is the most specific regarding the current path.
    		 * @return a negative integer, zero, or a positive integer as pattern1 is
    		 * more specific, equally specific, or less specific than pattern2.
    		 */
    		
    		public int compare(String pattern1, String pattern2) {
    			PatternInfo info1 = new PatternInfo(pattern1);
    			PatternInfo info2 = new PatternInfo(pattern2);
    
    			if (info1.isLeastSpecific() && info2.isLeastSpecific()) {
    				return 0;
    			}
    			else if (info1.isLeastSpecific()) {
    				return 1;
    			}
    			else if (info2.isLeastSpecific()) {
    				return -1;
    			}
    
    			boolean pattern1EqualsPath = pattern1.equals(this.path);
    			boolean pattern2EqualsPath = pattern2.equals(this.path);
    			if (pattern1EqualsPath && pattern2EqualsPath) {
    				return 0;
    			}
    			else if (pattern1EqualsPath) {
    				return -1;
    			}
    			else if (pattern2EqualsPath) {
    				return 1;
    			}
    
    			if (info1.isPrefixPattern() && info2.getDoubleWildcards() == 0) {
    				return 1;
    			}
    			else if (info2.isPrefixPattern() && info1.getDoubleWildcards() == 0) {
    				return -1;
    			}
    
    			if (info1.getTotalCount() != info2.getTotalCount()) {
    				return info1.getTotalCount() - info2.getTotalCount();
    			}
    
    			if (info1.getLength() != info2.getLength()) {
    				return info2.getLength() - info1.getLength();
    			}
    
    			if (info1.getSingleWildcards() < info2.getSingleWildcards()) {
    				return -1;
    			}
    			else if (info2.getSingleWildcards() < info1.getSingleWildcards()) {
    				return 1;
    			}
    
    			if (info1.getUriVars() < info2.getUriVars()) {
    				return -1;
    			}
    			else if (info2.getUriVars() < info1.getUriVars()) {
    				return 1;
    			}
    
    			return 0;
    		}
    
    
    		/**
    		 * Value class that holds information about the pattern, e.g. number of
    		 * occurrences of "*", "**", and "{" pattern elements.
    		 */
    		private static class PatternInfo {
    
    	
    			private final String pattern;
    
    			private int uriVars;
    
    			private int singleWildcards;
    
    			private int doubleWildcards;
    
    			private boolean catchAllPattern;
    
    			private boolean prefixPattern;
    
    	
    			private Integer length;
    
    			public PatternInfo(String pattern) {
    				this.pattern = pattern;
    				if (this.pattern != null) {
    					initCounters();
    					this.catchAllPattern = this.pattern.equals("/**");
    					this.prefixPattern = !this.catchAllPattern && this.pattern.endsWith("/**");
    				}
    				if (this.uriVars == 0) {
    					this.length = (this.pattern != null ? this.pattern.length() : 0);
    				}
    			}
    
    			protected void initCounters() {
    				int pos = 0;
    				if (this.pattern != null) {
    					while (pos < this.pattern.length()) {
    						if (this.pattern.charAt(pos) == '{') {
    							this.uriVars++;
    							pos++;
    						}
    						else if (this.pattern.charAt(pos) == '*') {
    							if (pos + 1 < this.pattern.length() && this.pattern.charAt(pos + 1) == '*') {
    								this.doubleWildcards++;
    								pos += 2;
    							}
    							else if (pos > 0 && !this.pattern.substring(pos - 1).equals(".*")) {
    								this.singleWildcards++;
    								pos++;
    							}
    							else {
    								pos++;
    							}
    						}
    						else {
    							pos++;
    						}
    					}
    				}
    			}
    
    			public int getUriVars() {
    				return this.uriVars;
    			}
    
    			public int getSingleWildcards() {
    				return this.singleWildcards;
    			}
    
    			public int getDoubleWildcards() {
    				return this.doubleWildcards;
    			}
    
    			public boolean isLeastSpecific() {
    				return (this.pattern == null || this.catchAllPattern);
    			}
    
    			public boolean isPrefixPattern() {
    				return this.prefixPattern;
    			}
    
    			public int getTotalCount() {
    				return this.uriVars + this.singleWildcards + (2 * this.doubleWildcards);
    			}
    
    			/**
    			 * Returns the length of the given pattern, where template variables are considered to be 1 long.
    			 */
    			public int getLength() {
    				if (this.length == null) {
    					this.length = (this.pattern != null ?
    							VARIABLE_PATTERN.matcher(this.pattern).replaceAll("#").length() : 0);
    				}
    				return this.length;
    			}
    		}
    	}
    
    
    	/**
    	 * A simple cache for patterns that depend on the configured path separator.
    	 */
    	private static class PathSeparatorPatternCache {
    
    		private final String endsOnWildCard;
    
    		private final String endsOnDoubleWildCard;
    
    		public PathSeparatorPatternCache(String pathSeparator) {
    			this.endsOnWildCard = pathSeparator + "*";
    			this.endsOnDoubleWildCard = pathSeparator + "**";
    		}
    
    		public String getEndsOnWildCard() {
    			return this.endsOnWildCard;
    		}
    
    		public String getEndsOnDoubleWildCard() {
    			return this.endsOnDoubleWildCard;
    		}
    	}
    
    }

我们有时候不用spring框架 但是想要这种校验ant的风格 可以直接拿过来用