AppClassLoader和WebAppClasssLoader的坑

private void loadXmlResource() {
        // Spring may not know the real resource name so we check a flag
        // to prevent loading again a resource twice
        // this flag is set at XMLMapperBuilder#bindMapperForNamespace
        if (!configuration.isResourceLoaded("namespace:" + type.getName())) {
            String xmlResource = type.getName().replace(‘.‘, ‘/‘) + ".xml";
            InputStream inputStream = null;
            try {
                System.out.println("ClassLoader: " + type.getClassLoader());
                inputStream = Resources.getResourceAsStream(
                    type.getClassLoader(), xmlResource);
            } catch (IOException e) {
                // ignore, resource is not required
            }
            if (inputStream != null) {
                XMLMapperBuilder xmlParser = new XMLMapperBuilder(inputStream,
                    assistant.getConfiguration(), xmlResource,
                    configuration.getSqlFragments(), type.getName());
                xmlParser.parse();
            }
        }
    }