org.springframework.util.AntPathMatcher的使用

就像名字提示的那样，路径模式是使用了Apache Ant的样式路径，Apache Ant样式的路径有三种通配符匹配方法。

通配符	描述
?	匹配任何单字符
*	匹配0或者任意数量的字符
**	匹配0或者更多的目录

使用方法比较简单，如下：

public static void main(String[] args){
		AntPathMatcher matcher = new AntPathMatcher();
		System.out.println(matcher.match("/**", "/resources/css/base.css"));
		System.out.println(matcher.match("**", "test/test1/test/2/test.jsp"));
		System.out.println(matcher.match("**", "/test/test1/test/2/test.jsp/"));
	}

输出

true
true
false

贴上源码

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 = StringUtils.tokenizeToStringArray(pattern, this.pathSeparator, this.trimTokens, true);
		String[] pathDirs = StringUtils.tokenizeToStringArray(path, this.pathSeparator, this.trimTokens, true);

		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 patDir = pattDirs[pattIdxStart];
			if ("**".equals(patDir)) {
				break;
			}
			if (!matchStrings(patDir, 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) :
						!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 patDir = pattDirs[pattIdxEnd];
			if (patDir.equals("**")) {
				break;
			}
			if (!matchStrings(patDir, 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;
	}

版权声明：本文为博主原创文章，未经博主允许不得转载。