/**

     * 判断项目中是否有slf4j的实现类

     */

    @org.junit.Test

    public void test() {

        try {

            Enumeration<URL> resources = ClassLoader.getSystemResources("org/slf4j/impl/StaticLoggerBinder.class");

            while (resources.hasMoreElements()) {

                URL url = resources.nextElement();

                System.out.println(url.toString());

            }

        } catch (IOException e) {

            e.printStackTrace();

        }

    }