import org.springframework.security.access.expression.ExpressionUtils; //导入依赖的package包/类
@Override
public Mono<Boolean> decide(Authentication authentication, ServerWebExchange object, Flux<ConfigAttribute> configAttributes) {
	ConfigAttribute attribute = configAttributes.blockFirst();
	EvaluationContext context = handler.createEvaluationContext(authentication, object);
	Expression expression = handler.getExpressionParser().parseExpression(attribute.getAttribute());
	return Mono.just(ExpressionUtils.evaluateAsBoolean(expression, context));
}
 

import org.springframework.security.access.expression.ExpressionUtils; //导入依赖的package包/类
@Override
public boolean evaluateExpression(final String spel) {
    final org.springframework.expression.ExpressionParser parser = SECURITY_EXPRESSION_HANDLER
            .getExpressionParser();
    final org.springframework.expression.Expression exp = parser.parseExpression(spel, PARSER_CONTEXT);
    final HttpServletRequest request = RequestCycles.getContainerRequest();
    final HttpServletResponse response = RequestCycles.getContainerResponse();
    final Authentication authentication = getAuthentication();
    final FilterInvocation invocation = new FilterInvocation(request, response, FILTER_CHAIN);
    final org.springframework.expression.EvaluationContext ctx = SECURITY_EXPRESSION_HANDLER
            .createEvaluationContext(authentication, invocation);
    return ExpressionUtils.evaluateAsBoolean(exp, ctx);
}
 

import org.springframework.security.access.expression.ExpressionUtils; //导入依赖的package包/类
public boolean evaluateAsBoolean(String authorizeExpressionString){
       Expression authorizeExpression = parser.parseExpression(authorizeExpressionString);
       return ExpressionUtils.evaluateAsBoolean(authorizeExpression, ctx);
}