logback日志接入

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1.首先引入logback的jar包

2.用maven生成的工程，logback在maven下的坐标如下：

<!-- 日志相关 begin-->  <dependency>      <groupId>org.slf4j</groupId>      <artifactId>slf4j-api</artifactId>  </dependency>  <dependency>      <groupId>ch.qos.logback</groupId>      <artifactId>logback-classic</artifactId>  </dependency>  <dependency>      <groupId>ch.qos.logback</groupId>      <artifactId>logback-core</artifactId>  </dependency>  <dependency>      <groupId>org.slf4j</groupId>      <artifactId>log4j-over-slf4j</artifactId>  </dependency>  <dependency>      <groupId>org.slf4j</groupId>      <artifactId>jcl-over-slf4j</artifactId>  </dependency>  <dependency>      <groupId>org.logback-extensions</groupId>      <artifactId>logback-ext-spring</artifactId>  </dependency>  <!-- 日志相关 end -->

3.写logback的配置文件，xml配置方式

<?xml version="1.0" encoding="UTF-8"?><configuration>    <!--定义日志文件的存储地址 勿在 LogBack 的配置中使用相对路径-->      <property name="LOG_HOME" value="e:/log" />      <!-- 控制台输出 -->       <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">       <!-- 日志输出编码 -->         <Encoding>UTF-8</Encoding>           <layout class="ch.qos.logback.classic.PatternLayout">                <!--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>           </layout>       </appender>       <!-- 按照每天生成日志文件 -->       <appender name="FILE"  class="ch.qos.logback.core.rolling.RollingFileAppender">           <Encoding>UTF-8</Encoding>           <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">            <!--日志文件输出的文件名-->            <FileNamePattern>${LOG_HOME}/myApp.log.%d{yyyy-MM-dd}.log</FileNamePattern>               <MaxHistory>30</MaxHistory>        </rollingPolicy>           <layout class="ch.qos.logback.classic.PatternLayout">              <!--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>          </layout>         <!--日志文件最大的大小-->       <triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">         <MaxFileSize>10MB</MaxFileSize>       </triggeringPolicy>    </appender>    <!-- show parameters for hibernate sql 专为 Hibernate 定制 -->      <logger name="org.hibernate.type.descriptor.sql.BasicBinder"  level="TRACE" />      <logger name="org.hibernate.type.descriptor.sql.BasicExtractor"  level="DEBUG" />      <logger name="org.hibernate.SQL" level="DEBUG" />      <logger name="org.hibernate.engine.QueryParameters" level="DEBUG" />      <logger name="org.hibernate.engine.query.HQLQueryPlan" level="DEBUG" />      <!-- 日志输出级别 -->    <root level="INFO">           <appender-ref ref="STDOUT" />         <appender-ref ref="FILE" />       </root>      <!--日志异步到数据库 -->  </configuration>

4.写测试类

package com.log;import org.slf4j.Logger;import org.slf4j.LoggerFactory;/** * 类TestLog.java的实现描述： * @author ...  */public class TestLog {    private final static Logger logger = LoggerFactory.getLogger(TestLog.class);    public static void main(String[] args){        TestLog log = new TestLog();        for(int i = 0 ;i< 10;i++){            log.print();        }    }    public void print(){        logger.info("info");        logger.warn("warn");        logger.error("erro");    }}

5.此时可以看到打印的日志了

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