虚拟log4j配置（用于测试）

Question

是否可以通过简单的方式从Java代码配置log4j-结果我希望将所有日志都写入stdout？

Answer 1

static Logger logger = Logger.getLogger(NewMain1.class);

public static void main(String[] args) {
    BasicConfigurator.configure();

    logger.info("out");
}

Answer 2

Log4j has a ConsoleAppender to redirect the logs to console. Here is a sample config:

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n

Answer 3

Logger root = Logger.getRootLogger();
root.addAppender(new ConsoleAppender(
    new PatternLayout(PatternLayout.TTCC_CONVERSION_PATTERN)));