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
进入此路径logs文件夹下的webapps文件夹下有三个文件。
Snipaste_2018-11-11_20-14-35.png
在浏览器输入连接http://localhost:8080/o2o/superadmin/listarea
Snipaste_2018-11-11_20-17-08.png
查看控制台输出
Snipaste_2018-11-11_20-18-48.png
在之前文件夹下自动生成相应的文件
Snipaste_2018-11-11_20-20-35.png
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