Spring EL表达式

一、

二、

使用范例：

    public static void main(String[] args) {
//        while(true) {
//            long totalMemory = Runtime.getRuntime().totalMemory() / 1024 / 1024;
//            long maxMemory = Runtime.getRuntime().maxMemory() / 1024 / 1024;
//            System.out.println(totalMemory + "M");
//            System.out.println(maxMemory + "M");
//        }
        EvaluationContext context = new StandardEvaluationContext();
        ExpressionParser parser = new SpelExpressionParser();
        Person person = new Person("Tom", 18);
        context.setVariable("person", person);
        String v = parser.parseExpression("他的名字为#{#person.name}", new TemplateParserContext()).getValue(context, String.class); // 他的名字为Tom
        System.out.println(v);
    }

    static class Person {
        private String name;
        private int age;

        public Person(String name, int age) {
            super();
            this.name = name;
            this.age = age;
        }

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }

        public int getAge() {
            return age;
        }

        public void setAge(int age) {
            this.age = age;
        }
    }