使用BeanUtils检索字段值

PropertyUtils.getSimpleProperty(...)

public class BeanUtilTest {
    public static void main(String[] args) throws ... {
        MyBean bean = new MyBean();

        Field field = bean.getClass().getDeclaredField(\"bar\");
        field.setAccessible(true);
        System.out.println(field.get(bean));
    }

    public static class MyBean {
        private final String bar = \"foo\";
    }
}