Scala日志打印

基于scala-logging和logback的日志打印模板，其中logback是一个更高效/更优于log4j的日志打印框架，目前正逐渐替代log4j的位置，以下为实现日志打印的几个步骤：

1. 添加依赖

以maven为例：

<dependency>
    <groupId>com.typesafe.scala-logging</groupId>
    <artifactId>scala-logging_${scala.version}</artifactId>
    <version>3.5.0</version>
</dependency>
<dependency>
    <groupId>ch.qos.logback</groupId>
    <artifactId>logback-classic</artifactId>
    <version>1.2.3</version>
</dependency>

2. 添加配置文件

在resources目录下添加logback.xml文件，该文件就类似于log4j.properties

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <pattern>%d{HH:mm:ss.SSS} TKD [%thread] %-5level %logger{36} - %msg%n</pattern>
        </encoder>
    </appender>

    <appender name="FILE" class="ch.qos.logback.core.FileAppender">
        <file>/tmp/test.log</file>
        <append>true</append>
        <encoder>
            <pattern>%d{HH:mm:ss.SSS} TKD [%thread] %-5level %logger{36} - %msg%n</pattern>
        </encoder>
    </appender>

    <root level="INFO">
        <appender-ref ref="STDOUT"/>
        <appender-ref ref="FILE"/>
    </root>
    <logger name="scala.slick" level="INFO" />
</configuration>

具体配置自行修改

3. 代码操作

import com.typesafe.scalalogging.Logger

private[this] val logger = Logger(this.getClass)

logger.info("server ready ...... ")

打印效果：

23:16:05.668 TKD [main] INFO  c.z.p.monitorcenter.CEApplication$ - server ready ...... 
23:16:05.676 TKD [main] INFO  c.z.p.monitorcenter.CEApplication$ - RabbitMq Consumer Thread Start ......