springboot 日志篇

日志：
Spring默认日志系统是slf4j + logback
logback官方文档

(1)log4j接口的使用方式

public class Foo {
  static final Logger logger = LoggerFactory.getLogger(Foo.class);

  public void doIt() {
    logger.debug("Did it again!");
  }
}

或者可以使用lombok的@Slf4j注释

日志配置方法

1.使用application.yml文件

logging:
  pattern:
    console: "%d-%msg%n"
  file:
    path: ./sell_log
  level: error

2.使用logback-spring.xml

<?xml version="1.0" encoding="UTF-8"?>
<configuration name="consoleLog" class="ch.qos.logback.core.ConsoleAppender">
    <appender name="consoleLog" class="ch.qos.logback.core.ConsoleAppender">
        <Layout class="ch.qos.logback.classic.PatternLayout">
            <pattern>
                %d - %msg%n
            </pattern>
        </Layout>
    </appender>

    <appender name="fileInfoLog" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <!--  日志过滤   -->
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>INFO</level>
            <onMatch>ACCEPT</onMatch>
        </filter>
        <encoder>
            <pattern>
                %msg%n
            </pattern>
        </encoder>
        <!--  滚动策略   -->
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>./log/info.%d.log</fileNamePattern>
        </rollingPolicy>
    </appender>

    <root level="info">
        <appender-ref ref="consoleLog"/>
        <appender-ref ref="fileInfoLog"/>
    </root>
</configuration>