slf4j logback创建日志

来源：互联网发布：python 3程序开发指南编辑：程序博客网时间：2024/04/30 23:55

1. 首先准备相关jar包，如下：

slf4j-api-1.7.2.jar,logback-classic-1.0.9.jar,logback-core-1.0.9.jar

2. 在src 文件路径下，存放logback.xml文件，具体内容如下：

<?xml version="1.0" encoding="UTF-8"?><configuration debug="true"><!-- 应用名称 --><property name="APP_NAME" value="logtest" /><!--日志文件的保存路径,首先查找系统属性-Dlog.dir,如果存在就使用其；否则，在当前目录下创建名为logs目录做日志存放的目录 --><property name="LOG_HOME" value="${log.dir:-logs}/${APP_NAME}" /><!-- 日志输出格式 --><property name="ENCODER_PATTERN"value="%d{yyyy-MM-dd  HH:mm:ss.SSS} [%thread] %-5level %logger{80} - %msg%n" /><contextName>${APP_NAME}</contextName><!-- 控制台日志：输出全部日志到控制台 --><appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender"><encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder"><Pattern>${ENCODER_PATTERN}</Pattern></encoder></appender><!-- 文件日志：输出全部日志到文件 --><appender name="FILE"class="ch.qos.logback.core.rolling.RollingFileAppender"><rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"><fileNamePattern>${LOG_HOME}/output.%d{yyyy-MM-dd}.log</fileNamePattern><maxHistory>7</maxHistory></rollingPolicy><encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder"><pattern>${ENCODER_PATTERN}</pattern></encoder></appender><!-- 错误日志：用于将错误日志输出到独立文件 --><appender name="ERROR_FILE"class="ch.qos.logback.core.rolling.RollingFileAppender"><rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"><fileNamePattern>${LOG_HOME}/error.%d{yyyy-MM-dd}.log</fileNamePattern><maxHistory>7</maxHistory></rollingPolicy><encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder"><pattern>${ENCODER_PATTERN}</pattern></encoder><filter class="ch.qos.logback.classic.filter.ThresholdFilter"><level>WARN</level></filter></appender><!-- 独立输出的同步日志 --><appender name="SYNC_FILE"  class="ch.qos.logback.core.rolling.RollingFileAppender"><rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"><fileNamePattern>${LOG_HOME}/sync.%d{yyyy-MM-dd}.log</fileNamePattern><maxHistory>7</maxHistory></rollingPolicy><encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder"><pattern>${ENCODER_PATTERN}</pattern></encoder></appender><logger name="log.sync" level="DEBUG" addtivity="true"><appender-ref ref="SYNC_FILE" /></logger><root><level value="DEBUG" /><appender-ref ref="STDOUT" /><appender-ref ref="FILE" /><appender-ref ref="ERROR_FILE" /></root></configuration>

3. 测试日志代码即可。

package test;import org.slf4j.Logger;import org.slf4j.LoggerFactory;public class Slf4jTest {//private final static Logger log = LoggerFactory.getLogger(Slf4jTest.class);private final static Logger log1 = LoggerFactory.getLogger("log.sync");public static void main(String[] args) {try {log1.error("this is an error test.");log1.info("{} is {}.",new Object[]{"a","b"});System.out.println("OK.");} catch (Exception e) {e.printStackTrace();}}}

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