Spring Boot的listener(监听器)简单使用实例详解

监听器（listener）的注册方法和 servlet 一样，有两种方式：代码注册或者注解注册

1.代码注册方式

通过代码方式注入过滤器

 @bean
  public servletlistenerregistrationbean servletlistenerregistrationbean(){
    servletlistenerregistrationbean servletlistenerregistrationbean = new servletlistenerregistrationbean();
    servletlistenerregistrationbean.setlistener(new indexlistener());
    return servletlistenerregistrationbean;
  }

indexlistener.java类：

package com.example.listener;
import javax.servlet.servletcontextevent;
import javax.servlet.servletcontextlistener;
public class indexlistener implements servletcontextlistener{
  @override
  public void contextdestroyed(servletcontextevent arg0) {
    system.out.println("indexlistener contextdestroyed method");
  }
  @override
  public void contextinitialized(servletcontextevent arg0) {
    system.out.println("indexlistener contextinitialized method");
  }
}

2.注解方式

通过注解方式注入过滤器

indexlistener2.java类

package com.example.listener;
import javax.servlet.servletcontextevent;
import javax.servlet.servletcontextlistener;
import javax.servlet.annotation.weblistener;
@weblistener
public class indexlistener2 implements servletcontextlistener{
  @override
  public void contextdestroyed(servletcontextevent arg0) {
    system.out.println("indexlistener2 contextdestroyed method");
  }
  @override
  public void contextinitialized(servletcontextevent arg0) {
    system.out.println("indexlistener2 contextinitialized method");
  }
}

把注解加到入口处启动即可

@springbootapplication
@servletcomponentscan
public class springbootsimpleapplication {
  public static void main(string[] args) {
    springapplication.run(springbootsimpleapplication.class, args);
  }
}

以上所述是小编给大家介绍的spring boot的listener(监听器)简单使用实例详解，希望对大家有所帮助