public int loadBeanDefinitions(String location) throws BeanDefinitionStoreException ...{   
    ResourceLoader resourceLoader = getResourceLoader();   
    if (resourceLoader == null) ...{   
      throw new BeanDefinitionStoreException(   
          "Cannot import bean definitions from location [" + location + "]:
            no ResourceLoader available");   
    }   
  
    if (resourceLoader instanceof ResourcePatternResolver) ...{   
      // Resource pattern matching available.   
      try ...{   
<span style="color:red;">   
//根据配置文件读取相应配置   
        Resource[] resources = ((ResourcePatternResolver) resourceLoader).
          getResources(location);   
</span>   
        int loadCount = loadBeanDefinitions(resources);   
        if (logger.isDebugEnabled()) ...{   
          logger.debug("Loaded " + loadCount + " bean definitions from location 
            pattern [" + location + "]");   
        }   
        return loadCount;   
      }   
      catch (IOException ex) ...{   
        throw new BeanDefinitionStoreException(   
            "Could not resolve bean definition resource pattern [" + location + "]", ex);   
      }   
    }   
    else ...{   
      // Can only load single resources by absolute URL.   
      Resource resource = resourceLoader.getResource(location);   
      int loadCount = loadBeanDefinitions(resource);   
      if (logger.isDebugEnabled()) ...{   
        logger.debug("Loaded " + loadCount + " bean definitions from location 
             [" + location + "]");   
      }   
      return loadCount;   
    }   
  }  

    这个是其中一个ResourceLoader的实现 
    ==>PathMatchingResourcePatternResolver.getResources(String locationPattern);

public Resource[] getResources(String locationPattern) throws IOException ...{   
    Assert.notNull(locationPattern, "Location pattern must not be null");   
    if (locationPattern.startsWith(CLASSPATH_ALL_URL_PREFIX)) ...{   
      // a class path resource (multiple resources for same name possible)   
<span style="color:red;">   
      if (getPathMatcher().isPattern(locationPattern.substring(
            CLASSPATH_ALL_URL_PREFIX.length()))) ...{   
        // a class path resource pattern   
        return findPathMatchingResources(locationPattern);   
      }   
      else ...{   
        // all class path resources with the given name   
        return findAllClassPathResources(locationPattern.substring(
                CLASSPATH_ALL_URL_PREFIX.length()));   
      }   
</span>   
    }   
    else ...{   
      // Only look for a pattern after a prefix here   
      // (to not get fooled by a pattern symbol in a strange prefix).   
      int prefixEnd = locationPattern.indexOf(":") + 1;   
      if (getPathMatcher().isPattern(locationPattern.substring(prefixEnd))) ...{   
        // a file pattern   
        return findPathMatchingResources(locationPattern);   
      }   
      else ...{   
        // a single resource with the given name   
        return new Resource[] ...{getResourceLoader().getResource(locationPattern)};   
      }   
    }   
  }