logback使用详解

log4j替换成logback

移除相关依赖

<dependency>
 <groupId>log4j</groupId>
 <artifactId>log4j</artifactId>
</dependency>
<dependency>
 <groupId>org.slf4j</groupId>
 <artifactId>slf4j-log4j12</artifactId>
</dependency>

添加logback依赖

<!-- logback日志配置开始 -->
<dependency>
 <groupId>ch.qos.logback</groupId>
 <artifactId>logback-core</artifactId>
</dependency>
<dependency>
 <groupId>ch.qos.logback</groupId>
 <artifactId>logback-access</artifactId>
</dependency>
<dependency>
 <groupId>ch.qos.logback</groupId>
 <artifactId>logback-classic</artifactId>
</dependency>
<dependency>
 <groupId>org.slf4j</groupId>
 <artifactId>log4j-over-slf4j</artifactId>
</dependency>
<!-- logback日志配置结束 -->

spring中使用logback日志组件替换log4j

import javax.servlet.ServletContextEvent;  
import javax.servlet.ServletContextListener;  
import org.slf4j.Logger;  
import org.slf4j.LoggerFactory;  
import ch.qos.logback.classic.LoggerContext;  
import ch.qos.logback.classic.joran.JoranConfigurator;  
import ch.qos.logback.core.joran.spi.JoranException;  
/** 
 * @author Kiven Lee 
 * @version 1.0 
 */  
public class LogbackConfigListener implements ServletContextListener {  
    private static final Logger logger = LoggerFactory.getLogger(LogbackConfigListener.class);  
     
    private static final String CONFIG_LOCATION = "logbackConfigLocation";  
    @Override  
    public void contextInitialized(ServletContextEvent event) {  
        //从web.xml中加载指定文件名的日志配置文件  
        String logbackConfigLocation = event.getServletContext().getInitParameter(CONFIG_LOCATION);  
        String fn = event.getServletContext().getRealPath(logbackConfigLocation);  
        try {  
            LoggerContext loggerContext = (LoggerContext)LoggerFactory.getILoggerFactory();  
            loggerContext.reset();  
            JoranConfigurator joranConfigurator = new JoranConfigurator();  
            joranConfigurator.setContext(loggerContext);  
            joranConfigurator.doConfigure(fn);  
            logger.debug("loaded slf4j configure file from {}", fn);  
        }  
        catch (JoranException e) {  
            logger.error("can loading slf4j configure file from " + fn, e);  
        }  
    }  
    @Override  
    public void contextDestroyed(ServletContextEvent event) {  
    }  
}  

在web.xml中加入

<!--初始化日志配置文件 -->  
 <listener>  
     <listener-class>  
         com.boaotech.util.LogbackConfigListener  
     </listener-class>  
 </listener>  
 <context-param>  
     <param-name>logbackConfigLocation</param-name>  
     <param-value>WEB-INF/logback.xml</param-value>  
 </context-param>  

logback配置文件两份

logback配置一

<?xml version="1.0" encoding="UTF-8"?>
<configuration debug="false">
    <!--定义日志文件的存储地址 勿在 LogBack 的配置中使用相对路径-->
    <!-- 控制台输出 -->
    <appender name="console" class="ch.qos.logback.core.ConsoleAppender">
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <!--格式化输出：%d表示日期，%thread表示线程名，%-5level：级别从左显示5个字符宽度%msg：日志消息，%n是换行符-->
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg  %n</pattern>
        </encoder>
    </appender>
    <!-- 按照每天生成日志文件 -->
    <appender name="logFile"  class="ch.qos.logback.core.rolling.RollingFileAppender">
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!--日志文件输出的文件名-->
            <FileNamePattern>log/runtime.log.%d{yyyy-MM-dd}.log</FileNamePattern>
            <!--日志文件保留天数-->
            <MaxHistory>30</MaxHistory>
        </rollingPolicy>
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <!--格式化输出：%d表示日期，%thread表示线程名，%-5level：级别从左显示5个字符宽度%msg：日志消息，%n是换行符-->
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%n</pattern>
        </encoder>
        <!--日志文件最大的大小-->
        <triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
            <MaxFileSize>10MB</MaxFileSize>
        </triggeringPolicy>
    </appender>

    <!-- 日志输出级别 -->
    <root level="INFO">
        <appender-ref ref="console" />
        <appender-ref ref="logFile" />
    </root>

    <logger name="com.crecgec" level="DEBUG" additivity="false">
        <appender-ref ref="console"/>
        <appender-ref ref="logFile" />
    </logger>

    <root level="error">
        <appender-ref ref="console"/>
        <appender-ref ref="logFile" />
    </root>

</configuration>

logback配置二

<?xml version="1.0" encoding="UTF-8" ?>

<configuration>

    <appender name="consoleLog" class="ch.qos.logback.core.ConsoleAppender">
        <layout class="ch.qos.logback.classic.PatternLayout">
            <pattern>
                %date{yyyy-MM-dd HH:mm:ss.SSS} %-5level[%thread]%logger{56}.%method:%L -%msg%n
            </pattern>
        </layout>
    </appender>

    <appender name="fileInfoLog" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>ERROR</level>
            <onMatch>DENY</onMatch>
            <onMismatch>ACCEPT</onMismatch>
        </filter>
        <encoder>
            <pattern>
                %date{yyyy-MM-dd HH:mm:ss.SSS} %-5level[%thread]%logger{56}.%method:%L -%msg%n
            </pattern>
        </encoder>
        <!--滚动策略-->
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!--路径-->
            <fileNamePattern>D:/log/logbackInfo.%d.log</fileNamePattern>
        </rollingPolicy>
    </appender>

    <appender name="fileErrorLog" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
            <level>ERROR</level>
        </filter>
        <encoder>
            <pattern>
                %date{yyyy-MM-dd HH:mm:ss.SSS} %-5level[%thread]%logger{56}.%method:%L -%msg%n
            </pattern>
        </encoder>
        <!--滚动策略-->
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!--路径-->
            <fileNamePattern>D:/log/logbackError.%d.log</fileNamePattern>
        </rollingPolicy>
    </appender>

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