Log4j深入研究 Log4j为单个类写单个日志文件 Log4j为包写文件

 log4j配置文件:

log4j.rootLogger=DEBUG,CONSOLE,FILE#优先级从高到低分别是ERROR、WARN、INFO、DEBUG#这里推荐选择二种，分别为ERROR:仅仅只记录错误名和位置；DEBUG：记录所有错误的详细信息#在生产配置下，请关闭应用于控制台CONSOLE选项，仅启用FILE及可log4j.addivity.org.apache=true# 应用于控制台log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppenderlog4j.appender.CONSOLE.Threshold=DEBUGlog4j.appender.CONSOLE.Target=System.outlog4j.appender.CONSOLE.Encoding=GBKlog4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayoutlog4j.appender.CONSOLE.layout.ConversionPattern=%d(line-%L)- %m%n#应用于文件log4j.appender.FILE=org.apache.log4j.RollingFileAppenderlog4j.appender.FILE.File=D:\webGame\game.loglog4j.appender.FILE.MaxFileSize=1MBlog4j.appender.FILE.MaxBackupIndex=100log4j.appender.FILE.Encoding=GBKlog4j.appender.FILE.layout=org.apache.log4j.PatternLayoutlog4j.appender.FILE.layout.ConversionPattern=%d [%t] %-5p %c(line-%L) %-4r %x - %m%n#这里为子日志文件配置log4j.logger.com.webgame.msg.manage.SendMsgStartup=DEBUG,CONSOLE1,FILE1log4j.addivity.org.apache=false#log4j.additivity.com.webgame.msg.manage.SendMsgStartup=false 这里如果设置为true,刚会把相关的日志文件,也写入到主日志文件里.log4j.additivity.com.webgame.msg.manage.SendMsgStartup=false# 应用于控制台 log4j.appender.CONSOLE1=org.apache.log4j.ConsoleAppenderlog4j.appender.CONSOLE1.Threshold=DEBUGlog4j.appender.CONSOLE1.Target=System.outlog4j.appender.CONSOLE1.Encoding=GBKlog4j.appender.CONSOLE1.layout=org.apache.log4j.PatternLayoutlog4j.appender.CONSOLE1.layout.ConversionPattern=%d(line-%L)- %m%n#应用于文件log4j.appender.FILE1=org.apache.log4j.RollingFileAppenderlog4j.appender.FILE1.Threshold=DEBUGlog4j.appender.FILE1.File=D:\webGame\blcs.msg.loglog4j.appender.FILE1.MaxFileSize=10MBlog4j.appender.FILE1.MaxBackupIndex=100log4j.appender.FILE1.Encoding=GBKlog4j.appender.FILE1.layout=org.apache.log4j.PatternLayoutlog4j.appender.FILE1.layout.ConversionPattern=%d [%t] %-5p %c(line-%L) %-4r %x - %m%n

 在红色的地方,就是配置说明,相关的配置会单独的写到blcs.msg.log 里.而不会写入到主日志文件里. 经过以上配置,SendMsgStartup 类里的所有日志信息都会写到一个文件里.

+++++++第一种++++++++++++++第一种++++++++++++++第一种++++++++++++++第一种+++++++

 

针对于第一种文件的配置,很郁闷的是,这个类里所有的日志都会写到blcs.msg.log 里.而实际上,可能一个些类我不想写到一个文件里.于是我改了一下配置. +++++++第二种++++++++++++第二种++++++++++++第二种++++++++++++第二种+++++

 

 

package com.webgame.msg.manage;import java.net.URL;import javax.servlet.ServletConfig;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import org.apache.log4j.Logger;import org.apache.log4j.PropertyConfigurator;import com.webgame.test.TestLog4j;public class SendMsgStartup extends HttpServlet {private final Logger logger = Logger.getLogger(SendMsgStartup.class);public void init(ServletConfig servletConfig) throws ServletException {try {super.init(servletConfig);logger.info("第一个info测试，测试加载的哪个文件");String BLCX_XML_CONFIG_FILEPATH = TestLog4j.class.getResource("/")+"xml/games/blcx.log4j.properties";//与第一种不同的地方URL url = new URL(BLCX_XML_CONFIG_FILEPATH);PropertyConfigurator.configure(url);Logger logger1 = Logger.getLogger(SendMsgStartup.class);for (int i = 0; i < 10; i++) {logger1.debug("debugdebugdebugdebugdebugdebugdebugdebugdebugdebugdebugdebugdebugdebugdebugdebugdebugdebugdebug");logger1.error("errorerrorerrorerrorerrorerrorerrorerrorerrorerrorerrorerrorerrorerrorerrorerrorerrorerrorerror");logger1.info("infoinfoinfoinfoinfoinfoinfoinfoinfoinfoinfoinfoinfoinfoinfoinfoinfoinfoinfoinfoinfoinfoinfoinfo");}logger.info("第一个info测试结束，测试加载的哪个文件");} catch (Exception e) {e.printStackTrace();}}}

 

独立出配置文件:blcx.log4j.properties

#log4j.rootLogger=DEBUG,CONSOLE,FILE#优先级从高到低分别是ERROR、WARN、INFO、DEBUG#这里推荐选择二种，分别为ERROR:仅仅只记录错误名和位置；DEBUG：记录所有错误的详细信息#在生产配置下，请关闭应用于控制台CONSOLE选项，仅启用FILE及可log4j.logger.com.webgame.msg.manage.SendMsgStartup=DEBUG,CONSOLE1,FILE1log4j.addivity.org.apache=falselog4j.additivity.com.webgame.msg.manage.SendMsgStartup=false# 应用于控制台log4j.appender.CONSOLE1=org.apache.log4j.ConsoleAppenderlog4j.appender.CONSOLE1.Threshold=DEBUGlog4j.appender.CONSOLE1.Target=System.outlog4j.appender.CONSOLE1.Encoding=GBKlog4j.appender.CONSOLE1.layout=org.apache.log4j.PatternLayoutlog4j.appender.CONSOLE1.layout.ConversionPattern=%d(line-%L)- %m%n#应用于文件log4j.appender.FILE1=org.apache.log4j.RollingFileAppenderlog4j.appender.FILE1.Threshold=DEBUGlog4j.appender.FILE1.File=D:\webGame\blcs.msg.loglog4j.appender.FILE1.MaxFileSize=10MBlog4j.appender.FILE1.MaxBackupIndex=100log4j.appender.FILE1.Encoding=GBKlog4j.appender.FILE1.layout=org.apache.log4j.PatternLayoutlog4j.appender.FILE1.layout.ConversionPattern=%d [%t] %-5p %c(line-%L) %-4r %x - %m%n

 +++++++第二种++++++++++++第二种++++++++++++第二种++++++++++++第二种+++++ 类文件改成以下:

package com.webgame.msg.manage;import java.net.URL;import javax.servlet.ServletConfig;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import org.apache.log4j.Logger;import org.apache.log4j.PropertyConfigurator;import com.webgame.test.TestLog4j;public class SendMsgStartup extends HttpServlet {private final Logger logger = Logger.getLogger(SendMsgStartup.class);public void init(ServletConfig servletConfig) throws ServletException {try {super.init(servletConfig);logger.info("第一个info测试，测试加载的哪个文件");String BLCX_XML_CONFIG_FILEPATH = TestLog4j.class.getResource("/")+"xml/games/blcx.log4j.properties";URL url = new URL(BLCX_XML_CONFIG_FILEPATH);PropertyConfigurator.configure(url);Logger logger1 = Logger.getLogger(SendMsgStartup.class);for (int i = 0; i < 10; i++) {logger1.debug("debugdebugdebugdebugdebugdebugdebugdebugdebugdebugdebugdebugdebugdebugdebugdebugdebugdebugdebug");logger1.error("errorerrorerrorerrorerrorerrorerrorerrorerrorerrorerrorerrorerrorerrorerrorerrorerrorerrorerror");logger1.info("infoinfoinfoinfoinfoinfoinfoinfoinfoinfoinfoinfoinfoinfoinfoinfoinfoinfoinfoinfoinfoinfoinfoinfo");}logger.info("第一个info测试结束，测试加载的哪个文件");} catch (Exception e) {e.printStackTrace();}}}

 

#给指定类设定等级和目的地

log4j.logger.包名.类名=debug,A1

 

#每天建立一个日志文件，格式为‘文件名-yyyy-MM-dd.log’

log4j.appender.A2=org.apache.log4j.DailyRollingFileAppender
log4j.appender.A2.file=c:/ccsLog
log4j.appender.A2.DatePattern='-'yyyy-MM-dd'.log'

 

#设定输出格式

log4j.appender.A2.layout=org.apache.log4j.PatternLayout   
log4j.appender.A2.layout.ConversionPattern=[%d{yy/MM/dd HH:mm:ss:SSS}][%C-%M] %m%n

 

 

 

private static Logger logger = Logger.getLogger(类名.class);//在指定类下建立logger