Log4j rootLogger根配置

1. rootLogger根配置

语法：
log4j.rootLogger = [ level ] , appenderName, appenderName, …
实际：
log4j.rootLogger=DEBUG, Console ,File
将debug层级及以上的信息输出到console和file

package com.open1111;
import org.apache.log4j.Logger;
public class Test {
    private static Logger logger = Logger.getLogger(Test.class);
    public static void main(String[] args) {
        logger.debug("调试debug信息");
    }
}

log4j.rootLogger=DEBUG, Console ,File

#Console  
log4j.appender.Console=org.apache.log4j.ConsoleAppender  
log4j.appender.Console.layout=org.apache.log4j.PatternLayout  
log4j.appender.Console.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n

#File
log4j.appender.File = org.apache.log4j.FileAppender
log4j.appender.File.File = E://log4j-test-log.log
log4j.appender.File.layout = org.apache.log4j.PatternLayout
log4j.appender.File.layout.ConversionPattern =%d [%t] %-5p [%c] - %m%n

运行结果:
1. console打印
2018-12-11 22:01:42,948 [main] DEBUG [com.open1111.Test] - 调试debug信息

2. log4j-test-log.log文件显示
2018-12-11 22:01:42,948 [main] DEBUG [com.open1111.Test] - 调试debug信息