个人笔记——日志

日志笔记汇集

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Log4j Or Logback

打印日志类

private final Logger logger = LoggerFactory.getLogger(Example.class);

相关依赖包

      <dependency>            <groupId>org.slf4j</groupId>            <artifactId>slf4j-api</artifactId>            <version>${slf4j.version}</version>        </dependency>        <dependency>            <groupId>log4j</groupId>            <artifactId>log4j</artifactId>            <version>${log4j.version}</version>        </dependency>        <!-- logback相关Jar -->        <dependency>            <groupId>ch.qos.logback</groupId>            <artifactId>logback-core</artifactId>            <version>${logback.version}</version>        </dependency>        <dependency>            <groupId>ch.qos.logback</groupId>            <artifactId>logback-classic</artifactId>            <version>${logback.version}</version>        </dependency>

slf4j 日志标准（可直接导入slf4j），log4j具体执行项目
log4j 和 logback（SpringBoot默认就是用的这个记录） 同一创始人开发的不同开源项目。 log4j参考资料

配置文件（log4j.properties）

og4j.rootCategory=INFO, stdout , R   log4j.appender.stdout=org.apache.log4j.ConsoleAppender   log4j.appender.stdout.layout=org.apache.log4j.PatternLayout   log4j.appender.stdout.layout.ConversionPattern=[QC] %p [%t] %C.%M(%L) | %m%n   log4j.appender.R=org.apache.log4j.DailyRollingFileAppender   log4j.appender.R.File=D:\\Tomcat 5.5\\logs\\qc.log   log4j.appender.R.layout=org.apache.log4j.PatternLayout   1log4j.appender.R.layout.ConversionPattern=%d-[TS] %p %t %c - %m%n   log4j.logger.com.neusoft=DEBUG   log4j.logger.com.opensymphony.oscache=ERROR   log4j.logger.net.sf.navigator=ERROR   log4j.logger.org.apache.commons=ERROR   log4j.logger.org.apache.struts=WARN   log4j.logger.org.displaytag=ERROR   log4j.logger.org.springframework=DEBUG   log4j.logger.com.ibatis.db=WARN   log4j.logger.org.apache.velocity=FATAL   log4j.logger.com.canoo.webtest=WARN   log4j.logger.org.hibernate.ps.PreparedStatementCache=WARN   log4j.logger.org.hibernate=DEBUG   log4j.logger.org.logicalcobwebs=WARN  log4j.rootCategory=INFO, stdout , Rlog4j.appender.stdout=org.apache.log4j.ConsoleAppenderlog4j.appender.stdout.layout=org.apache.log4j.PatternLayoutlog4j.appender.stdout.layout.ConversionPattern=[QC] %p [%t] %C.%M(%L) | %m%nlog4j.appender.R=org.apache.log4j.DailyRollingFileAppenderlog4j.appender.R.File=D:\\Tomcat 5.5\\logs\\qc.log log4j.appender.R.layout=org.apache.log4j.PatternLayout1log4j.appender.R.layout.ConversionPattern=%d-[TS] %p %t %c - %m%nlog4j.logger.com.neusoft=DEBUGlog4j.logger.com.opensymphony.oscache=ERRORlog4j.logger.net.sf.navigator=ERRORlog4j.logger.org.apache.commons=ERRORlog4j.logger.org.apache.struts=WARNlog4j.logger.org.displaytag=ERRORlog4j.logger.org.springframework=DEBUGlog4j.logger.com.ibatis.db=WARNlog4j.logger.org.apache.velocity=FATALlog4j.logger.com.canoo.webtest=WARNlog4j.logger.org.hibernate.ps.PreparedStatementCache=WARNlog4j.logger.org.hibernate=DEBUGlog4j.logger.org.logicalcobwebs=WARN

如果用的是logback配置文件（logback.xml）

<?xml version="1.0" encoding="UTF-8"?><configuration debug="false" scan="true" scanPeriod="60 seconds">    <!--全局属性变量定义 -->    <property name="project_name" value="具体项目名"/>    <property name="log_dir" value="${CATALINA_HOME}/logs/具体项目名"/>    <property name="log_pattern" value="%date [%thread] %level %L %logger:%msg%n"/>    <property name="log_encoding" value="UTF-8"/>    <property name="log_file" value="${log_dir}/${project_name}.%d{yyyy-MM-dd}.%i.log"/>    <property name="error_file" value="${log_dir}/error/${project_name}.%d{yyyy-MM-dd}.log"/>    <property name="max_file_size" value="50MB"/>    <!-- 控制台输出 -->    <appender name="console" class="ch.qos.logback.core.ConsoleAppender">        <encoding>${log_encoding}</encoding>        <filter class="ch.qos.logback.classic.filter.LevelFilter">            <level>DEBUG</level>            <onMatch>ACCEPT</onMatch>            <onMismatch>NEUTRAL</onMismatch>        </filter>        <encoder>            <pattern>${log_pattern}</pattern>        </encoder>    </appender>    <!--日志文件 -->    <appender name="log_file" class="ch.qos.logback.core.rolling.RollingFileAppender">        <encoding>${log_encoding}</encoding>        <filter class="ch.qos.logback.classic.filter.LevelFilter">            <level>DEBUG</level>            <onMatch>ACCEPT</onMatch>            <onMismatch>NEUTRAL</onMismatch>        </filter>        <filter class="ch.qos.logback.classic.filter.LevelFilter">            <level>INFO</level>            <onMatch>ACCEPT</onMatch>            <onMismatch>NEUTRAL</onMismatch>        </filter>        <filter class="ch.qos.logback.classic.filter.LevelFilter">            <level>ERROR</level>            <onMatch>ACCEPT</onMatch>            <onMismatch>DENY</onMismatch>        </filter>        <filter class="ch.qos.logback.classic.filter.LevelFilter">            <level>WARN</level>            <onMatch>ACCEPT</onMatch>            <onMismatch>DENY</onMismatch>        </filter>        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">            <FileNamePattern>${log_file}</FileNamePattern>            <MaxHistory>30</MaxHistory>            <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">                <maxFileSize>${max_file_size}</maxFileSize>            </timeBasedFileNamingAndTriggeringPolicy>        </rollingPolicy>        <encoder>            <pattern>${log_pattern}</pattern>        </encoder>    </appender>    <!-- 错误日志文件 -->    <appender name="error_file" class="ch.qos.logback.core.rolling.RollingFileAppender">        <encoding>${log_encoding}</encoding>        <filter class="ch.qos.logback.classic.filter.LevelFilter">            <level>ERROR</level>            <onMatch>ACCEPT</onMatch>            <onMismatch>DENY</onMismatch>        </filter>        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">            <FileNamePattern>${error_file}</FileNamePattern>            <MaxHistory>30</MaxHistory>        </rollingPolicy>        <encoder>            <pattern>${log_pattern}</pattern>        </encoder>    </appender>    <!-- 下面配置一些第三方包的日志过滤级别，用于避免刷屏 -->    <logger name="org.springframework" level="DEBUG"/>    <logger name="org.apache" level="WARN"/>    <logger name="org.mongodb" level="WARN"/>    <logger name="org.mybatis" level="DEBUG" />    <logger name="java.sql" level="DEBUG" />    <logger name="java.sql" level="DEBUG" />    <logger name="com.jxust.peng" level="DEBUG"/>    <logger name="com.alicloud.openservices.tablestore" level="WARN"/>    <!--根目录级别设置 -->    <root>        <appender-ref ref="console"/>        <appender-ref ref="log_file"/>        <appender-ref ref="error_file"/>    </root></configuration>

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