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log4j.rootLogger=DEBUG,console,file
log4j.appender.console=org.apache.log4j.ConsoleAppender
log4j.appender.console.layout=org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern=[%p]%d{yyy-MM-dd hh:mm:ss} %F - %m%n
log4j.appender.file=org.apache.log4j.FileAppender
log4j.appender.file.File=log.txt
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=[%p]%d %F - %m%n
public class LogDemo {
private static Logger logger = Logger.getLogger(LogDemo.class);
public static void main(String[] args) {
// System.out.println("This is println message.");
// 记录debug级别的信息
logger.debug("This is debug message.");
// 记录info级别的信息
logger.info("This is info message.");
// 记录error级别的信息
logger.error("This is error message.");
}
}