ClassPathResource不能正常获取文件资源

Resource resource = new ClassPathResource("data/test/txt");  
String path = resource.getFile().getPath());

Caused by: java.io.FileNotFoundException: class path resource [application.yml] 
cannot be resolved to absolute file path because it does not reside in the file system: 

public static File getFile(URL resourceUrl, String description) throws FileNotFoundException {
    Assert.notNull(resourceUrl, "Resource URL must not be null");
    if (!"file".equals(resourceUrl.getProtocol())) {
        throw new FileNotFoundException(description + " cannot be resolved to absolute file path because it does not reside in the file system: " + resourceUrl);
    } else {
        try {
            return new File(toURI(resourceUrl).getSchemeSpecificPart());
        } catch (URISyntaxException var3) {
            return new File(resourceUrl.getFile());
        }
    }
}