Spring源码学习-含有通配符路径解析（上）

核心提示：* with prepended root directory path * @param dir the current directory * @param result the Set of matching File instances to add to * @throws IOException if

* with prepended root directory path
* @param dir the current directory
* @param result the Set of matching File instances to add to
* @throws IOException if directory contents could not be retrieved
*/
protected void doRetrieveMatchingFiles(String fullPattern, File dir, Set<File> result) throws IOException {
if (logger.isDebugEnabled()) {
logger.debug("Searching directory [" + dir.getAbsolutePath() +
"] for files matching pattern [" + fullPattern + "]");
}
File[] dirContents = dir.listFiles();
if (dirContents == null) {
if (logger.isWarnEnabled()) {
logger.warn("Could not retrieve contents of directory [" + dir.getAbsolutePath() + "]");
}
return;
}
for (File content : dirContents) {
String currPath = StringUtils.replace(content.getAbsolutePath(), File.separator, "/");
if (content.isDirectory() && getPathMatcher().matchStart(fullPattern, currPath + "/")) {
if (!content.canRead()) {
if (logger.isDebugEnabled()) {
logger.debug("Skipping subdirectory [" + dir.getAbsolutePath() +
"] because the application is not allowed to read the directory");
}
}
else {
doRetrieveMatchingFiles(fullPattern, content, result);
}
}
if (getPathMatcher().match(fullPattern, currPath)) {
result.add(content);
}
}
}
主要的匹配工作，是从doRetrieveMatchingFiles 方法开始的。前面的都是简单的封装过渡，在retrieveMatchingFiles中判断了下根路径是否存在、是否是文件夹、是否可读。否则都直接返回空集合。都满足了以后才进入，doRetrieveMatchingFiles 方法。在该方法中，

首先，列出该文件夹下的所有文件。
然后，遍历所有文件，如果仍是文件夹，递归调用doRetrieveMatchingFiles方法。如果不是，则调用getPathMatcher().match(fullPattern, currPath)进行文件名的最后匹配，将满足条件放入结果集。

该match方法，实际是调用了AntPathMatcher的doMatch方法，
/**
* Actually match the given <code>path</code> against the given <code>pattern</code>.
* @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</code> if the supplied <code>path</code> matched, <code>false</code> 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 = StringUtils.tokenizeToStringArray(pattern, this.pathSeparator);
String[] pathDirs = StringUtils.tokenizeToStringArray(path, this.pathSeparator);