详解spring boot容器加载完后执行特定操作

有时候我们需要在spring boot容器启动并加载完后，开一些线程或者一些程序来干某些事情。这时候我们需要配置contextrefreshedevent事件来实现我们要做的事情

1、applicationstartup类

public class applicationstartup implements applicationlistener<contextrefreshedevent>{
  public void onapplicationevent(contextrefreshedevent event)
   {
    //在容器加载完毕后获取dao层来操作数据库
    ossvideorepository ossvideorepository = (ossvideorepository)event.getapplicationcontext().getbean(ossvideorepository.class);
    //在容器加载完毕后获取配置文件中的配置
    serverconfig serverconfig = (serverconfig)event.getapplicationcontext().getbean(serverconfig.class);
    
    serverfilescanner filescanner = new serverfilescanner(
        ossvideorepository, serverconfig.getscanpath());
    //在容器加载完毕后启动线程
    thread thread = new thread(filescanner);
    thread.start();
   }
}

2、serverconfig 类

@component
@configurationproperties(prefix = "server")
public class serverconfig {
  private string aliyunossendpoint;
  private string aliyunossaccesskeyid;
  private string aliyunossaccesskeysecret;
  private string aliyunossbucketname;
  private string scanpath;

  public string getaliyunossendpoint() {
    return aliyunossendpoint;
  }

  public void setaliyunossendpoint(string aliyunossendpoint) {
    this.aliyunossendpoint = aliyunossendpoint;
  }

  public string getaliyunossaccesskeyid() {
    return aliyunossaccesskeyid;
  }

  public void setaliyunossaccesskeyid(string aliyunossaccesskeyid) {
    this.aliyunossaccesskeyid = aliyunossaccesskeyid;
  }

  public string getaliyunossaccesskeysecret() {
    return aliyunossaccesskeysecret;
  }

  public void setaliyunossaccesskeysecret(string aliyunossaccesskeysecret) {
    this.aliyunossaccesskeysecret = aliyunossaccesskeysecret;
  }

  public string getaliyunossbucketname() {
    return aliyunossbucketname;
  }

  public void setaliyunossbucketname(string aliyunossbucketname) {
    this.aliyunossbucketname = aliyunossbucketname;
  }

  public string getscanpath() {
    return scanpath;
  }

  public void setscanpath(string scanpath) {
    this.scanpath = scanpath;
  }

}

ps：还有一些spring内置的事件

1、 contextrefreshedevent：applicationcontext容器初始化或者刷新时触发该事件。
2、 contextstartedevent：当使用configurableapplicationcontext接口的start()方法启动applicationcontext容器时触发该事件。
3、 contextclosedevent：当使用configurableapplicationcontext接口的close()方法关闭applicationcontext容器时触发该事件。
4、 contextstopedevent: 当使用configurableapplicationcontext接口的stop()方法停止applicationcontext容器时触发该事件。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。