SLF4J

它不是一個真正的日誌實現，是一個抽象層，執行後臺使用任意一個日誌類庫，只需要更換依賴包和配置檔案。

LogBack + slf4j

1. 依賴：

   1.         <dependency>
                  <groupId>org.slf4j</groupId>
                  <artifactId>slf4j-api</artifactId>
                  <version>1.7.12</version>
              </dependency>
              <dependency>
                  <groupId>org.slf4j</groupId>
                  <artifactId>jcl-over-slf4j</artifactId>
                  <version>1.7.12</version>
              </dependency>
              <dependency>
                  <groupId>ch.qos.logback</groupId>
                  <artifactId>logback-core</artifactId>
                  <version>1.1.3</version>
              </dependency>
              <dependency>
                  <groupId>ch.qos.logback</groupId>
                  <artifactId>logback-classic</artifactId>
                  <version>1.1.3</version>
              </dependency>
       
      

      
      
      
2. logback.xml

   1. <?xml version="1.0" encoding="UTF-8"?>
      <configuration>
          <appender name="stdout" class="ch.qos.logback.core.ConsoleAppender">
              <encoder  class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
                  <pattern>%d{yyyy/MM/dd-HH:mm:ss.SSS} %level [%thread] %class:%line>>%msg%n</pattern>
              </encoder >
          </appender>
      
          <appender name="file" class="ch.qos.logback.core.FileAppender">
              <!--<file>D:/logs/dis.log</file>-->
              <file>/home/work/monkey_dispatcher/tomcat/logs/dispatcher.log</file>
              <encoder>
                  <pattern>%date %level [%thread] %logger{10} [%file:%line] %msg%n</pattern>
              </encoder>
          </appender>
      
          <appender name="rollingFile" class="ch.qos.logback.core.rolling.RollingFileAppender">
              <file>/home/work/monkey_dispatcher/tomcat/logs/</file>
              <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
                  <fileNamePattern>%d{yyyy-MM-dd}.log</fileNamePattern>
              </rollingPolicy>
              <encoder>
                  <pattern>%date %level [%thread] %logger{10} [%file:%line] %msg%n</pattern>
              </encoder>
          </appender>
      
          <!--<logger name="com.controller" level="INFO"></logger>-->
      
          <root level="debug">
              <appender-ref ref="stdout" />
              <appender-ref ref="file" />
              <appender-ref ref="rollingFile" />
          </root>
      
      </configuration>
       
      

      
      
      
3. java程式碼： 

   1. import org.slf4j.Logger;
      import org.slf4j.LoggerFactory;
      
      public class LogbackDemo {
      	private static Logger log = LoggerFactory.getLogger(LogbackDemo.class);
      	public static void main(String[] args) {
      		log.trace("trace");
      		log.debug("debug");
      		log.info("info");
      		log.warn("warn");
      		log.error("error");
      	}
      }