Spring log功能的加强

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       Spring 对 log4j 提供了很好的支持，并提供了 Log4jConfigListener 用于 log4j 标准配置文件的初始化和 2 个比较有意义的自身功能加强实现（ log4j 配置信息定时读取并更新，日志文件路径动态配置）。

1、 具体配置

1） web.xml 文件添加下述内容

<!— 设置 web 应用的 key ，通常为应用名称，在同一应用服务器下若部署了多个应用，那么此配置必须唯一 --> < context-param >        < param-name > webAppRootKey </ param-name >        < param-value > web-app </ param-value >     </ context-param >     <!— 设置 log4j.properties 的路径 -->     < context-param >        < param-name > log4jConfigLocation </ param-name >        < param-value > classpath:log4j.properties </ param-value >     </ context-param >     <!— 设置刷新时间间隔 -->     < context-param >        < param-name > log4jRefreshInterval </ param-name >        < param-value > 10000 </ param-value >     </ context-param >

 

2） log4j.properties 配置

log4j.rootLogger= debug,stdout   log4j.logger.org= info,orgLog #log4j.appender.stdout config log4j.appender.stdout= org.apache.log4j.ConsoleAppender log4j.appender.stdout.layout= org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern= %d %p [%c] - %m%n   #tomcatLogFile config log4j.appender.orgLog = org.apache.log4j.DailyRollingFileAppender log4j.appender.orgLog.File= ${web-app} /logs/org_ log4j.appender.orgLog.DatePattern= yyyy-MM-dd'.log' log4j.appender.orgLog.layout= org.apache.log4j.PatternLayout log4j.appender.orgLog.layout.ConversionPattern= %d{yyyy-MM-dd HH : mm:ss} %p [%c] - %m%n

注意此处的 log4j.appender.tomcatLog.File= ${web-app} /logs/org_, 系统会将所有 org 开头的 class 的日志输出到当前 web 应用的 logs 目录下，文件名为 org_, 每天产生一个日志文件。

2、  日志功能加强

通常日志写入分两类：操作日志和错误日志，比如操作日志文件为 process_ 开头，错误日志文件以 error_ 开头，此时就需要我们写个 LogManager 加以处理。

1）  LogManager

package com.marcus.common; import org.apache.log4j.Logger;   /**   *   * <p> Logger 的封装，定义了 ErrorLogger,ProcessLogger 等 </p>   * @author marcus   * @version $Id: LogManager.java,v 0.1 2010- 5- 28 下午 04:57:38 Exp $   */ public class LogManager {     /**       * 获取错误 Logger       * @param logUrl       * @return Logger       */     public static Logger getErrorLog(Object logUrl ){        //logUrl is class        if (logUrl instanceof Class ){            return Logger.getLogger ( "error." +((Class )logUrl ).getName());        }        else if (logUrl instanceof String)        {            return Logger.getLogger ( "error." +logUrl );        }         else            return Logger.getRootLogger ();     }         /**       * 获取操作 Logger       * @param logUrl       * @return Logger       */     public static Logger getProcessLog(Object logUrl){        //logUrl is class        if (logUrl instanceof Class ){            return Logger.getLogger ( "process." +((Class )logUrl).getName());        }        else if (logUrl instanceof String)        {            return Logger.getLogger ( "process." +logUrl);        }        else            return Logger.getRootLogger ();     } }

 

2）  log4j.properties 配置修改，见红色部分

log4j.rootLogger= debug,stdout   log4j.logger.org= info,orgLog log4j.logger.error= info,errorLog log4j.logger.process= info,processLog #log4j.appender.stdout config log4j.appender.stdout= org.apache.log4j.ConsoleAppender log4j.appender.stdout.layout= org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern= %d %p [%c] - %m%n   #tomcatLogFile config log4j.appender.orgLog = org.apache.log4j.DailyRollingFileAppender log4j.appender.orgLog.File= ${web-app} /logs/org_ log4j.appender.orgLog.DatePattern= yyyy-MM-dd'.log' log4j.appender.orgLog.layout= org.apache.log4j.PatternLayout log4j.appender.orgLog.layout.ConversionPattern= %d{yyyy-MM-dd HH : mm:ss} %p [%c] - %m%n #error log config log4j.appender.errorLog= org.apache.log4j.DailyRollingFileAppender log4j.appender.errorLog.File= ${web-app} /logs/error_ log4j.appender.errorLog.DatePattern= yyyy-MM-dd'.log' log4j.appender.errorLog.layout= org.apache.log4j.PatternLayout log4j.appender.errorLog.layout.ConversionPattern= %d{yyyy-MM-dd HH : mm:ss} %p [%c] - %m%n   #process log config log4j.appender.processLog= org.apache.log4j.DailyRollingFileAppender log4j.appender.processLog.File= ${web-app} /logs/process_ log4j.appender.processLog.DatePattern= yyyy-MM-dd'.log' log4j.appender.processLog.layout= org.apache.log4j.PatternLayout log4j.appender.processLog.layout.ConversionPattern= %d{yyyy-MM-dd HH : mm:ss} %p [%c] - %m%n

3）  添加 process 、 error 日志处理

package com.marcus.common;   import org.apache.log4j.Logger; import com.whhercp.common.LogManager;   public class LoggerDemo {     private Logger processLog = LogManager.getProcessLog (LesDemoServiceImpl. class );     private Logger errorLog = LogManager.getErrorLog (LesDemoServiceImpl. class );     public void writeLog(){        try {            processLog .info( "do action ..." );//write process log            //write your action code here        } catch (Exception e){            errorLog .error(e.getMessage()); //write error log        }     } }