ApplicationContext和ServletContext

小鱼儿 2024-02-18 11:45 7阅读 0赞

import org.springframework.beans.BeansException;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.boot.context.event.ApplicationStartedEvent;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.ApplicationContextAware;
    import org.springframework.context.ApplicationListener;
    import org.springframework.context.ConfigurableApplicationContext;
    import org.springframework.stereotype.Component;
    
    import javax.servlet.ServletContext;
    
    @Component
    public class TestListener implements ApplicationContextAware,
            ApplicationListener<ApplicationStartedEvent>
    {
        
        private ApplicationContext applicationContext;
    
        @Autowired
        private ServletContext servletContext;
    
        @Override
        public void onApplicationEvent(ApplicationStartedEvent event)
        {
        
            //get the container who trigger the event
            ConfigurableApplicationContext c = event.getApplicationContext();
            if (c == applicationContext)
            {
        
                System.out.println(servletContext);
    			System.out.println(servletContext.getContextPath());
            }
            // add in cusomized process.
            System.out.println(servletContext);
            System.out.println(ctx);
        }
    
        // interface to inject method, and access to Spring container
        @Override
        public void setApplicationContext(ApplicationContext ctx) throws BeansException
        {
        
            this.ctx = ctx;
        }
    }

上述servletContext 包含很多信息，如：context-path等，如下图：  
![在这里插入图片描述][aa67864d1bba464fa5600222be4894d1.png]

[aa67864d1bba464fa5600222be4894d1.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/18/7258986fcc5c40fc97636853267d345d.png