public static ShenyuPluginLoader getInstance() {
        if (null == pluginLoader) {
            synchronized (ShenyuPluginLoader.class) {
                if (null == pluginLoader) {
                    pluginLoader = new ShenyuPluginLoader();
                }
            }
        }
        return pluginLoader;
    }
@Test
    public void testGetBean() {
        boolean exist = SpringBeanUtils.getInstance().existBean("dividePlugin");
        assertTrue(exist);
        Object dividePlugin = SpringBeanUtils.getInstance().getBean("dividePlugin");
        assertNotNull(dividePlugin);
    }