logback日志介绍

主要模块

• logback-access
• logback-classic
• logback-core
  主要标签
• logger:主要用于存放日志对象。
• appender:用于指定日志输出的目的地。(控制台、文件等)
• layout:格式化日志信息的输出。
  logBack的配置

• 新建logback.xml文件

  
  
  Snipaste_2018-11-11_19-36-22.png

<?xml version="1.0" encoding="utf-8"?>
<!-- scan="true":当配置文件发生改变,将重新加载 
     scanPeriod="60 seconds":每分钟自动扫描是否配置是否改变
     debug="false":如果为true,将打印logback内部的日志信息-->
<configuration scan="true" scanPeriod="60 seconds" debug="false">
    <!--定义参数常量 -->
    <!-- 日志级别：TRACE < DUBUG < INFO < WARN < ERROR -->
    <!--logger.trace("msg") logger.debug... -->
    <property name="log.level" value="debug" />
    <!-- 保留多长时间 -->
    <property name="log.maxHistory" value="30" />
    <!-- 日志存储的根路径 -->
    <property name="log.filePath" value="${catalina.base}/logs/webapps" />
    <!-- 日志展现的格式   格式：时间、线程、级别、类的信息、信息、换行 -->
    <property name="log.pattern"
        value="%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%n" />
    <!--控制台设置 -->
    <appender name="consoleAppender" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <pattern>${log.pattern}</pattern>
        </encoder>
    </appender>
    <!--DEBUG -->
    <appender name="debugAppender"
        class="ch.qos.logback.core.rolling.RollingFileAppender">
        <!--文件路径 -->
        <file>${log.filePath}/debug.log</file>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!--文件名称 -->
            <fileNamePattern>${log.filePath}/debug/debug.%d{yyyy-MM-dd}.log.gz
            </fileNamePattern>
            <!-- 文件最大保存历史数量(30天),若超出,第一天的日志将被删除 -->
            <maxHistory>${log.maxHistory}</maxHistory>
        </rollingPolicy>
        <encoder>
            <pattern>${log.pattern}</pattern>
        </encoder>
        <!-- 只记录level为DEBUG的日志 -->
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>DEBUG</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
    </appender>

    <!--INFO -->
    <appender name="infoAppender"
        class="ch.qos.logback.core.rolling.RollingFileAppender">
        <!--文件路径 -->
        <file>${log.filePath}/info.log</file>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!--文件名称 -->
            <fileNamePattern>${log.filePath}/info/info.%d{yyyy-MM-dd}.log.gz
            </fileNamePattern>
            <!-- 文件最大保存历史数量(30天) -->
            <maxHistory>${log.maxHistory}</maxHistory>
        </rollingPolicy>
        <encoder>
            <pattern>${log.pattern}</pattern>
        </encoder>
        <!-- 只记录level为INFO的日志 -->
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>INFO</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
    </appender>

    <!--ERROR -->
    <appender name="errorAppender"
        class="ch.qos.logback.core.rolling.RollingFileAppender">
        <!--文件路径 -->
        <file>${log.filePath}/error.log</file>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!--文件名称 -->
            <fileNamePattern>${log.filePath}/error/error.%d{yyyy-MM-dd}.log.gz
            </fileNamePattern>
            <!-- 文件最大保存历史数量(30天) -->
            <maxHistory>${log.maxHistory}</maxHistory>
        </rollingPolicy>
        <encoder>
            <pattern>${log.pattern}</pattern>
        </encoder>
        <!-- 只记录level为ERROR的日志 -->
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>ERROR</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
    </appender>

    <!-- 1.如果没有指定logger的level,则默认为root的level 
         2.当additivity="true"时,logger会将父类root下的appender-ref也放到logger下
         3.一个类只能定义一个logger,不能同时定义root,除非  additivity="true" ,logger会默认继承root
        -->
    <logger name="com.kings.o2o" level="${log.level}" additivity="true">
        <appender-ref ref="debugAppender" />
        <appender-ref ref="infoAppender" />
        <appender-ref ref="errorAppender" />
    </logger>

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

验证配置

修改com.kings.o2o.web.superadmin路径下的AreaController.java

package com.kings.o2o.web.superadmin;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import com.kings.o2o.entity.Area;
import com.kings.o2o.service.AreaService;

@Controller
@RequestMapping("/superadmin")
public class AreaController {

    Logger logger = LoggerFactory.getLogger(AreaController.class);
    @Autowired
    private AreaService areaService;
    @RequestMapping(value = "/listarea",method = RequestMethod.GET)
    @ResponseBody
    private Map<String,Object> listArea(){
        logger.info("===start===");
        long startTime = System.currentTimeMillis();
        Map<String, Object> modelMap = new HashMap<String,Object>();
        List<Area> list = new ArrayList<Area>();
        try {
            list = areaService.getAreaList();
            modelMap.put("rows", list);
            modelMap.put("total", list.size());
        }catch(Exception e){
            e.printStackTrace();
            modelMap.put("success", false);
            modelMap.put("errMsg", e.toString());
        }

        logger.error("test error!");
        long endTime = System.currentTimeMillis();
        logger.debug("costTime:[{}ms]",endTime-startTime);
        logger.info("===end===");
        return modelMap;
    }

}

运行tomcat服务器，在控制台找到CATALINA_BASE路径

Snipaste_2018-11-11_20-06-37.png

Snipaste_2018-11-11_20-14-35.png

Snipaste_2018-11-11_20-17-08.png

Snipaste_2018-11-11_20-18-48.png

Snipaste_2018-11-11_20-20-35.png