spring中使用logback日志组件替换log4j

Logback比log4j的强大之处，请到logback的主页去看，我就不啰嗦了，你懂、或者不懂，logback就在那里，无比强大，傲视绝伦。

复制log4j-over-slf4j.jar,logback-classic.jar,logback-core.jar,jcl-over-slf4j.jar到lib目录，删除原有的log4j.jar。

 

创建一个新类

 package com.boaotech.util;
 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 Kiven Lee
  * @version 1.0
  */
 public class LogbackConfigListener implements ServletContextListener {
     private static final Logger logger = LoggerFactory.getLogger(LogbackConfigListener.class);

     private static final String CONFIG_LOCATION = "logbackConfigLocation";
     @Override
     public void contextInitialized(ServletContextEvent event) {
         //从web.xml中加载指定文件名的日志配置文件
         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);
         }
     }
     @Override
     public void contextDestroyed(ServletContextEvent event) {
     }
 }

在web.xml中加入

 <!--初始化日志配置文件 -->
  <listener>
      <listener-class>
          com.boaotech.util.LogbackConfigListener
      </listener-class>
  </listener>
  <context-param>
      <param-name>logbackConfigLocation</param-name>
      <param-value>WEB-INF/logback.xml</param-value>
  </context-param>

最后，在WEB-INF下新建logback.xml配置，配置请参考logback帮助手册。

经过这样的配置后，应用中所有使用log4j,common-logger的jar，均可正常通过logback实现日志输出。