利用【监听器】动态加载Log4j配置文件

转自：https://veromca273.iteye.com/blog/1889304

1 创建监听器:

public class LogListener implements ServletContextListener
{
    private Log log = LogFactoryImpl.getFactory().getLog(LogListener.class);
    @Override
    public void contextDestroyed(ServletContextEvent arg0)
    {
        if (log.isDebugEnable())
        {
            log.debug("销毁LogListener....");
        }
    }

    @Override
    public void contextInitialized(ServletContextEvent arg0)
    {
        // 配置log4j
        String filePath = "src/conf/log4j.xml";
        DOMConfigurator.configure(filePath);
        if (log.isDebugEnable())
        {
            log.debug("初始化Web日志成功....");
        }
    }

2 修改web.xml 注册监听器

<listener>
    <listener-class>com.log.LogListener</listener-class>
</listener>