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【笔记】Listener学习笔记
source link: https://feiju12138.github.io/2022/10/02/Listener%E5%AD%A6%E4%B9%A0%E7%AC%94%E8%AE%B0/
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JavaWeb中的Listener（监听器）学习笔记
定义一个Listener类
- 实现对应的接口，重写所有抽象方法，类上添加注解
@WebListener
| 对application对象的监听器接口 | 作用 |
|---|---|
ServletContextListener |
用于对servletContext对象创建、销毁的监听 |
ServletContextAttributeListener |
用于对servletContext对象中属性增删改的监听 |
| 对session对象的监听器接口 | 作用 |
|---|---|
HttpSessionListener |
用于对session对象创建、销毁的监听 |
HttpSessionAttributeListener |
用于对session对象中属性增删改的监听 |
HttpSessionBindingListener |
用于对session对象绑定、解绑的监听 |
HttpSessionActivationListener |
用于对session对象钝化、活化的监听 |
| 对request对象的监听器接口 | 作用 |
|---|---|
ServletRequestListener |
用于对request对象创建、销毁的监听 |
ServletRequestAttributeListener |
用于对request对象中属性的增删改的监听 |
@WebListener
public class MyListener implements ServletContextListener {
...
}
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