有時候我們需要在spring boot容器啟動并加載完后，開一些線程或者一些程序來干某些事情。這時候我們需要配置ContextRefreshedEvent事件來實現我們要做的事情
1、ApplicationStartup類
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public class ApplicationStartup implements ApplicationListener<ContextRefreshedEvent>{ public void onApplicationEvent(ContextRefreshedEvent event) { //在容器加載完畢后獲取dao層來操作數據庫 OSSVideoRepository ossVideoRepository = (OSSVideoRepository)event.getApplicationContext().getBean(OSSVideoRepository.class); //在容器加載完畢后獲取配置文件中的配置 ServerConfig serverConfig = (ServerConfig)event.getApplicationContext().getBean(ServerConfig.class); ServerFileScanner fileScanner = new ServerFileScanner( ossVideoRepository, serverConfig.getScanpath()); //在容器加載完畢后啟動線程 Thread thread = new Thread(fileScanner); thread.start(); }} |
2、ServerConfig 類
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@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：還有一些spring內置的事件
1、 ContextRefreshedEvent：ApplicationContext容器初始化或者刷新時觸發該事件。
2、 ContextStartedEvent：當使用ConfigurableApplicationContext接口的start()方法啟動ApplicationContext容器時觸發該事件。
3、 ContextClosedEvent：當使用ConfigurableApplicationContext接口的close()方法關閉ApplicationContext容器時觸發該事件。
4、 ContextStopedEvent: 當使用ConfigurableApplicationContext接口的stop()方法停止ApplicationContext容器時觸發該事件。
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持服務器之家。
原文鏈接：https://www.jianshu.com/p/01f7a971a4b9
