核心：EL表达式解析器

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.core.LocalVariableTableParameterNameDiscoverer;
import org.springframework.expression.EvaluationContext;
import org.springframework.expression.ExpressionParser;
import org.springframework.expression.spel.standard.SpelExpressionParser;
import org.springframework.expression.spel.support.StandardEvaluationContext;

/**
 * 用于Method自定义注解的的EL表达式解析器
 * <p>
 * Created by surpass.wei@gmail.com on 2021/4/8.
 */
public class AnnotationElParser {
    private static final ExpressionParser spelExpressionParser = new SpelExpressionParser();
    private static final LocalVariableTableParameterNameDiscoverer discoverer = new LocalVariableTableParameterNameDiscoverer();

    /**
     * EL表达式解析
     *
     * @param clazz     返回值类型
     * @param joinPoint 切面连接点
     * @param elStr     EL表达式
     * @return 解析结果
     */
    public static <T> T parse(Class<T> clazz, JoinPoint joinPoint, String elStr) {
        Object[] args = joinPoint.getArgs();
        String[] params = discoverer.getParameterNames(((MethodSignature) joinPoint.getSignature()).getMethod());
        EvaluationContext context = new StandardEvaluationContext();
        for (int len = 0; len < (params != null ? params.length : 0); len++) {
            context.setVariable(params[len], args[len]);
        }
        return spelExpressionParser.parseExpression(elStr).getValue(context, clazz);
    }
}

使用案例

String name = AnnotationElParser.parse(String.class, joinPoint, "#user.name");
ArrayList<String> imgList = AnnotationElParser.parse(ArrayList.class, joinPoint, "#imgList");