不同路径下加载资源

1.从类路径下加载

ClassLoader.getSystemResourceAsStream(path);

2.从指定URL加载

new URL(url).openStream();

3.从指定文件加载

new FileInputStream(path);

public static final String CLASSPATH_PREFIX = "classpath:";public static final String URL_PREFIX = "url:";public static final String FILE_PREFIX = "file:";public static InputStream getInputStreamForPath(String resourcePath) throws IOException {        InputStream is;        if (resourcePath.startsWith(CLASSPATH_PREFIX)) {            is = loadFromClassPath(stripPrefix(resourcePath));        } else if (resourcePath.startsWith(URL_PREFIX)) {            is = loadFromUrl(stripPrefix(resourcePath));        } else if (resourcePath.startsWith(FILE_PREFIX)) {            is = loadFromFile(stripPrefix(resourcePath));        } else {            is = loadFromFile(resourcePath);        }        if (is == null) {            throw new IOException("Resource [" + resourcePath + "] could not be found.");        }        return is;}