resource\log4j.properties:

# Global logging configuration 开发时候建议使用 debug
# 优先级由高到低:OFF>FATAL>ERROR>WARN>INFO>DEBUG>ALL
log4j.rootLogger=debug, stdout 
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss} [ %t:%r ] - [ %p ] %l %m%n

trait IceTra {
  protected final val log : Logger= LoggerFactory.getLogger(this.getClass())


}

<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-api</artifactId>
    <version>1.7.5</version>
</dependency>
<dependency>
    <groupId>ch.qos.logback</groupId>
    <artifactId>logback-core</artifactId>
    <version>1.2.3</version>
</dependency>
<dependency>
    <groupId>ch.qos.logback</groupId>
    <artifactId>logback-classic</artifactId>
    <version>1.2.3</version>
</dependency>