Web.xml配置详解之listener
来源:互联网 发布:加工中心手动编程自学 编辑:程序博客网 时间:2024/05/27 21:15
定义:
<listener>
<listen-class>com.myapp.MyListener</listen-class>
</listener>
- 作用
该元素用来注册一个监听器类。可以收到事件什么时候发生以及用什么作为响应的通知。事件监听程序在建立、修改和删除会话或servlet环境时得到通知。常与context-param联合使用。 - listen-class 指定监听类,该类继承ServletContextListener 包含初始化方法contextInitialized(ServletContextEvent event) 和 销毁方法contextDestoryed(ServletContextEvent event)
- 示例:初始化日志配置文件
<!--初始化日志配置文件 -->
<listener><listener-class>
com.myapp.LogbackConfigListener
</listener-class>
</listener>
<context-param>
<param-name>logbackConfigLocation</param-name>
<param-value>WEB-INF/logback.xml</param-value>
</context-param>
/**
*
*/
package com.myapp;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.classic.joran.JoranConfigurator;
import ch.qos.logback.core.joran.spi.JoranException;
/**
* @author louisliao
*
*/
public class LogbackConfigListener implements ServletContextListener {
private static final Logger logger = LoggerFactory.getLogger(LogbackConfigListener.class);
private static final String CONFIG_LOCATION = "logbackConfigLocation";
/* (non-Javadoc)
* @see javax.servlet.ServletContextListener#contextDestroyed(javax.servlet.ServletContextEvent)
*/
public void contextDestroyed(ServletContextEvent arg0) {
// TODO Auto-generated method stub
}
/* (non-Javadoc)
* @see javax.servlet.ServletContextListener#contextInitialized(javax.servlet.ServletContextEvent)
*/
public void contextInitialized(ServletContextEvent event) {
// TODO Auto-generated method stub
String logbackConfigLocation = event.getServletContext().getInitParameter(CONFIG_LOCATION);
String fn = event.getServletContext().getRealPath(logbackConfigLocation);
try {
LoggerContext loggerContext = (LoggerContext)LoggerFactory.getILoggerFactory();
loggerContext.reset();
JoranConfigurator joranConfigurator = new JoranConfigurator();
joranConfigurator.setContext(loggerContext);
joranConfigurator.doConfigure(fn);
logger.debug("loaded slf4j configure file from {}", fn);
}
catch (JoranException e) {
logger.error("can loading slf4j configure file from " + fn, e);
}
}
}
- Web.xml配置详解之listener
- Web.xml配置详解之listener
- Web.xml配置详解之listener
- Web.xml配置详解之listener
- Web.xml配置之listener
- Web.xml配置详解之context-param,listener
- web.xml配置详解之listener与context-param
- web.xml 配置-listener
- web.xml配置详解 context-param listener init-param
- web.xml Listener 监听器配置
- java中web.xml中的<listener> 详解
- web.xml listener、filter、servlet详解
- web.xml里listener、filter配置
- j2ee中web.xml中配置listener
- java web.xml 配置session listener
- Web.xml配置详解之context-param
- web.xml配置详解之filter
- SSH之web.xml配置详解
- iOS objc.io#19#与调试器共舞 - LLDB 的华尔兹
- 解决Could not find a storyboard named 'MainStoryBoard' in bundle NSBundle
- 不规则div之<div两垂直边向里凹陷>
- iOS技术网站汇总(持续更新ing)
- cocos2dx3.0 tiger机简单实例
- Web.xml配置详解之listener
- 编码转换工具网址
- Shell编程极简入门实践
- 豆瓣获取电影信息
- mysql数据库中添加新的字段
- 【iOS开发-26】利用协议代理实现导航控制器UINavigationController视图之间的正向传值和反向传值
- 字符编码
- hdu 5147 树状数组
- 对枚举值(Enum)进行位操作(AND & OR)