技術標籤：javaideplsqlchromexampp

@Component(value = "student")
public class Student {

    static {
        Class st = com.example.demo12.classs.Student.class;
        Component component = (Component) st.getAnnotation(Component.class);
        System.out.println("開始===========" + component.value());
        //獲取 foo 這個代理例項所持有的 InvocationHandler
        InvocationHandler h = Proxy.getInvocationHandler(component);
        Map memberValues = null;
        try {
            // 獲取 AnnotationInvocationHandler 的 memberValues 欄位
            Field hField = h.getClass().getDeclaredField("memberValues");
            // 因為這個欄位事 private final 修飾，所以要開啟許可權
            hField.setAccessible(true);
            // 獲取 memberValues
            memberValues = (Map) hField.get(h);
        } catch (NoSuchFieldException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
        // 修改 value 屬性值
        memberValues.put("value", "teacher");
        // 獲取 foo 的 value 屬性值
        String value = component.value();
        System.out.println("結束===========" + value);
    }

    private String name;
    private int 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;
    }

    /**
     * 
     * @param args
     */
    public static void main(String[] args) {

    }