public class PatternSample {
static public void main(String[] args) throws Exception {
Logger rootLogger = (Logger) LoggerFactory.getLogger("root");
LoggerContext loggerContext = rootLogger.getLoggerContext();
loggerContext.reset();
PatternLayoutEncoder encoder = new PatternLayoutEncoder();
encoder.setContext(loggerContext);
encoder.setPattern("%-5level [%thread]: %message%n");
encoder.start();