判断项目中是否有slf4j的实现类

/**
     * 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();
        }
    }