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PathMatchingResourcePatternResolver

  根据包路径得到所有匹配的类路径

protected Set
   
     doFindAllClassPathResources(String path) throws IOException {		Set
    
      result = new LinkedHashSet<>(16);		ClassLoader cl = getClassLoader();		Enumeration
     
       resourceUrls = (cl != null ? cl.getResources(path) : ClassLoader.getSystemResources(path));		while (resourceUrls.hasMoreElements()) {			URL url = resourceUrls.nextElement();			result.add(convertClassLoaderURL(url));		}		if ("".equals(path)) {			// The above result is likely to be incomplete, i.e. only containing file system references.			// We need to have pointers to each of the jar files on the classpath as well...			addAllClassLoaderJarRoots(cl, result);		}		return result;	}
     
    
   

根据类路径，得到匹配的所有的class文件

protected void doRetrieveMatchingFiles(String fullPattern, File dir, Set
   
     result) throws IOException {		if (logger.isTraceEnabled()) {			logger.trace("Searching directory [" + dir.getAbsolutePath() +					"] for files matching pattern [" + fullPattern + "]");		}		for (File content : listDirectory(dir)) {			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);			}		}	}
   

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