本篇内容主要讲解“log4j的操作方法”，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习“log4j的操作方法”吧!
1 log4j的配置文件
2 log4j的调用
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1 log4j.properties
### 设置org.zblog域对应的级别DEBUG、INFO、WARN、ERROR和FATAL和输出地A1，A2，A3 ##
log4j.category.org.consoleLog=ERROR,A1
log4j.category.org.fileLog=WARN,A3
##指定采用文本方式输出
log4j.appender.A1=org.apache.log4j.ConsoleAppender
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} [%p] %m%n %c
##指定采用文本方式输出
log4j.appender.A3=org.apache.log4j.RollingFileAppender
log4j.appender.A1.Threshold=INFO
log4j.appender.A3.File=./log/INFORMATION.log
### 文件大小##
log4j.appender.A3.MaxFileSize=1024KB
### 文件个数##
log4j.appender.A3.MaxBackupIndex=3
log4j.appender.A3.Append=true
log4j.appender.A3.layout=org.apache.log4j.PatternLayout
log4j.appender.A3.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} [%p] %m%n %c
2 log4j的调用
public class Log4jPrinter {
// 文件输出的log
private Logger fileLog4j = null;
// 在控制台输出的log
private Logger consoleLog4j = null;
private static Log4jPrinter instance = null;
private Log4jPrinter(){
PropertyConfigurator.configure("./log4j.properties");
consoleLog4j = Logger.getLogger("org.consoleLog");
fileLog4j = Logger.getLogger("org.fileLog");
}
public static synchronized Log4jPrinter getLog4jPrinter(){
if(instance == null){
instance = new Log4jPrinter();
}
return instance;
}
public void debug(String logInfo,Throwable ex){
fileLog4j.debug(logInfo,ex);
}
public void info(String logInfo,Throwable ex){
fileLog4j.info(logInfo,ex);
}
public void error(String logInfo,Throwable ex){
consoleLog4j.error(logInfo,ex);
fileLog4j.error(logInfo,ex);
}
public void warn(String logInfo,Throwable ex){
fileLog4j.warn(logInfo,ex);
}
public void debug(Throwable ex){
fileLog4j.debug(ex);
}
public void info(Throwable ex){
fileLog4j.info(ex);
}
public void error(Throwable ex){
fileLog4j.error(ex);
consoleLog4j.error(ex);
}
public void warn(Throwable ex){
fileLog4j.warn(ex);
}
public static void main(String[] args){
Log4jPrinter log4j = Log4jPrinter.getLog4jPrinter();
try{
log4j.info("test....",null);
Integer.parseInt("sss");
}catch(Exception ex){
log4j.error(ex.getMessage(),ex);
}
}
}
到此，相信大家对“log4j的操作方法”有了更深的了解，不妨来实际操作一番吧！这里是编程网网站，更多相关内容可以进入相关频道进行查询，关注我们，继续学习！
