@Override
    public Expression createExpression(String expression) {
        org.springframework.expression.Expression defaultExpression = parser.parseExpression(expression);
        EvaluationContext evaluationContext = ((SpelExpression)defaultExpression).getEvaluationContext();
        ((StandardEvaluationContext)evaluationContext).setBeanResolver(new AppContextBeanResolver());
        return new SpringELExpression(defaultExpression);
    }
@Test
    public void testCreateExpression() {
        SpringELExpressionFactory factory = new SpringELExpressionFactory(null);
        Assertions.assertNotNull(factory.createExpression("'Hello World'.concat('!')"));
    }