springboot日志 - HelloWorld开发者社区

原则：

代码中尽量使用slf4j门面

尽量采用注解方式@Slf4j节省代码量

springboot日志

步骤：

1.排除springboot默认日志（logback）

<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
        <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-logging</artifactId>
                </exclusion>
        </exclusions>
</dependency>

2.引入slf4j和log4j2的jar包

<dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-api</artifactId>
      <version>1.8.0-beta2</version>
</dependency>

<dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-log4j2</artifactId>
</dependency>

3.添加log4j2的配置文件log4j2-spring.xml

<?xml version="1.0" encoding="UTF-8"?>
<Configuration>
    <!--http://blog.csdn.net/u013066244/article/details/72461105-->
    <!--https://github.com/alibaba/druid/wiki/Druid中使用log4j2进行日志输出-->
    <Properties>
        <!-- 配置日志文件输出目录 -->
        <property name="LOG_HOME">/cwdata/logs</property>
        <property name="SERVER_NAME">first</property>
    </Properties>

    <Appenders>
        <!--这个输出控制台的配置-->
        <Console name="Console" target="SYSTEM_OUT">
            <PatternLayout pattern="%date{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %level [%class{36}.%M: %L] - %msg%n" />
        </Console>

        <!-- 按天第天备份一个日志 -->
        <RollingFile name="RollingFile" fileName="${LOG_HOME}/xxx-web.log"
                     filePattern="${LOG_HOME}/xxx-web%d{yyyy-MM-dd}_%i.log">
            <PatternLayout pattern="%date{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %level [%class{36}.%M: %L] - %msg%n" />
            <Policies>
                <!-- 每24小时更新一次 -->
                <TimeBasedTriggeringPolicy modulate="true" interval="1"/>
                <SizeBasedTriggeringPolicy size="300 MB"/>
            </Policies>
            <!-- 最多备份30个 -->
            <DefaultRolloverStrategy fileIndex="max" max="60" />
        </RollingFile>

        <!--文件会打印出所有信息，这个log每次运行程序会自动清空，由append属性决定，这个也挺有用的，适合临时测试用-->
        <!-- 
        <File name="Log_test" fileName="${LOG_HOME}/test.log" append="false">
            <PatternLayout pattern="%date{yyyy-MM-dd HH:mm:ss.SSS} %level [%class{36}.%M: %L] - %msg%n"/>
        </File>
         -->

    </Appenders>
    
    <Loggers>
        <Root level="info">
            <AppenderRef ref="Console" />
            <AppenderRef ref="RollingFile" />
            <!--<AppenderRef ref="AsyncMail"/>-->
        </Root>

        <!--<logger name="com.cloudwave.skm" level="error" additivity="false">-->
            <!--<AppenderRef ref="AsyncMail"/>-->
        <!--</logger>-->

        <logger name="org.springframework" level="info" additivity="false">
            <AppenderRef ref="Console" />
            <AppenderRef ref="RollingFile" />
        </logger>
        <logger name="org.mybatis" level="debug" additivity="false">
            <AppenderRef ref="Console" />
            <AppenderRef ref="RollingFile" />
        </logger>
        <logger name="org.mybatis.spring" level="info" additivity="false">
            <AppenderRef ref="Console" />
            <AppenderRef ref="RollingFile" />
        </logger>
        <logger name="java.sql.Connection" level="info" additivity="false">
            <AppenderRef ref="Console" />
            <AppenderRef ref="RollingFile" />
        </logger>
        <logger name="java.sql.Statement" level="info" additivity="false">
            <AppenderRef ref="Console" />
            <AppenderRef ref="RollingFile" />
        </logger>
        <logger name="java.sql.PreparedStatement" level="info" additivity="false">
            <AppenderRef ref="Console" />
            <AppenderRef ref="RollingFile" />
        </logger>
        <logger name="java.sql.ResultSet" level="info" additivity="false">
            <AppenderRef ref="Console" />
            <AppenderRef ref="RollingFile" />
        </logger>
        <logger name="com.cloudwave.skm.db.mapper" level="TRACE" additivity="false">
            <AppenderRef ref="Console" />
            <AppenderRef ref="RollingFile" />
        </logger>
        
        <logger name="org.codehaus.jackson" level="error" additivity="false">
            <AppenderRef ref="Console" />
            <AppenderRef ref="RollingFile" />
        </logger>
        
        <!--记录druid-sql的记录-->
        <logger name="druid.sql.Statement" level="debug" additivity="false">
            <AppenderRef ref="Console" />
            <appender-ref ref="RollingFile"/>
        </logger>
        <logger name="druid.sql.Statement" level="debug" additivity="false">
            <AppenderRef ref="Console" />
            <appender-ref ref="RollingFile"/>
        </logger>
        
         <!--log4j2 自带过滤日志-->
        <Logger name="org.apache.catalina.startup.DigesterFactory" level="error" />
        <Logger name="org.apache.catalina.util.LifecycleBase" level="error" />
        <Logger name="org.apache.coyote.http11.Http11NioProtocol" level="warn" />
        <logger name="org.apache.sshd.common.util.SecurityUtils" level="warn"/>
        <Logger name="org.apache.tomcat.util.net.NioSelectorPool" level="warn" />
        <Logger name="org.crsh.plugin" level="warn" />
        <logger name="org.crsh.ssh" level="warn"/>
        <Logger name="org.eclipse.jetty.util.component.AbstractLifeCycle" level="error" />
        <Logger name="org.hibernate.validator.internal.util.Version" level="warn" />
        <logger name="org.springframework.boot.actuate.autoconfigure.CrshAutoConfiguration" level="warn"/>
        <logger name="org.springframework.boot.actuate.endpoint.jmx" level="warn"/>
        <logger name="org.thymeleaf" level="warn"/>
    </Loggers>
</Configuration>

4.在application.yml中配置日志属性

# 日志配置
logging:
# 指定日志配置文件位置
  config: classpath:log4j2-spring.xml
# 设置具体打印策略
  level:
    com.xx: info
    org.springframework: WARN
    org.spring.springboot.dao: debug

5.代码中使用

maven添加lombok插件依赖，在任意类中加上@Slf4j注解，然后使用log.info()打印日志

springboot日志