CGLib动态代理

文章字数：75,阅读全文大约需要1分钟

• 创建一个类

public class UserServiceImpl {
    public void add() {
        System.out.println("添加了一个用户");
    }
}

• 代理类

public class UserServiceCGlib implements MethodInterceptor {
    private Object target;
    
    public UserServiceCGlib(Object target) {
        this.target = target;
    }
    
    public Object getProxyInstance() {
        // 工具类
        Enhancer enhancer = new Enhancer();
        // 设置父类
        enhancer.setSuperclass(target.getClass());
        // 设置回调函数
        enhancer.setCallback(this);
        // 创建代理
        return enhancer.create();
    }
    
    @Override
    public Object intercept(Object o, Method method, Object[] objects, MethodProxy methodProxy) throws Throwable {
        System.out.println("before");
        Object result = methodProxy.invokerSuper(o, object);
        System.out.println("after");
        return result;
    }
}

• 使用

UserServiceCGlib serviceCGlib = new UserServiceCGlib(new UserServiceImpl());
UserServiceImpl userService = (UserServiceImpl)serviceCGlib.getProxyIntance();
userService.addUser();

---