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🔖 log4j 示例
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‎codes/javalib/log/log4j-demo/pom.xml‎

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<?xml version="1.0"?>
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<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
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xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
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<modelVersion>4.0.0</modelVersion>
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<!-- [Part 1] BASIC SETTINGS BEGIN -->
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<!-- MAVEN COORDINATE BEGIN -->
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<groupId>io.github.dunwu</groupId>
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<artifactId>javalib-log-log4j</artifactId>
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<version>1.0.0</version>
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<packaging>jar</packaging>
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<!-- MAVEN COORDINATE END -->
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<!-- RELATIONSHIP SETTINGS BEGIN -->
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<dependencies>
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<!-- log start -->
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<dependency>
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<groupId>org.slf4j</groupId>
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<artifactId>slf4j-api</artifactId>
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<version>1.7.25</version>
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</dependency>
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<dependency>
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<groupId>org.slf4j</groupId>
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<artifactId>slf4j-log4j12</artifactId>
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<version>1.7.25</version>
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</dependency>
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<dependency>
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<groupId>log4j</groupId>
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<artifactId>log4j</artifactId>
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<version>1.2.17</version>
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</dependency>
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<!-- log end -->
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>4.12</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<!-- RELATIONSHIP SETTINGS END -->
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<!-- PROPERTIES BEGIN -->
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<java.version>1.8</java.version>
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<maven.compiler.source>${java.version}</maven.compiler.source>
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<maven.compiler.target>${java.version}</maven.compiler.target>
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<logback.version>1.2.3</logback.version>
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</properties>
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<!-- PROPERTIES END -->
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<!-- [Part 1] BASIC SETTINGS END -->
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<!-- [Part 2] BUILD SETTINGS BEGIN -->
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<build>
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<resources>
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<resource>
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<filtering>true</filtering>
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<directory>src/main/resources</directory>
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</resource>
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</resources>
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</build>
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<!-- [Part 2] BUILD SETTINGS END -->
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<!-- [Part 3] PROJECT INFO BEGIN -->
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<name>${project.artifactId}</name>
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<description>log4j 示例</description>
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<!-- [Part 3] PROJECT INFO END -->
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</project>

‎codes/javalib/log/log4j-demo/src/main/java/io/github/dunwu/javalib/log/Log4jDemo.java‎

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package io.github.dunwu.javalib.log;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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/**
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* log4j 示例
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* @author Zhang Peng
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* @date 2018/3/29
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* @see <a href="http://logging.apache.org/log4j/1.2/">log4j 官网</a>
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*/
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public class Log4jDemo {
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private static final Logger logger = LoggerFactory.getLogger(Log4jDemo.class);
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public static void main(String[] args) {
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for (int i = 0; i < 10; i++) {
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logger.trace("NO.{} 这是一条 {} 日志记录", i, "trace");
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logger.debug("NO.{} 这是一条 {} 日志记录", i, "debug");
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logger.info("NO.{} 这是一条 {} 日志记录", i, "info");
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logger.warn("NO.{} 这是一条 {} 日志记录", i, "warn");
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logger.error("NO.{} 这是一条 {} 日志记录", i, "error");
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}
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}
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}

‎codes/javalib/log/log4j-demo/src/main/resources/log4j.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
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<log4j:configuration xmlns:log4j='http://jakarta.apache.org/log4j/'>
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<appender name="TRACE-APPENDER" class="org.apache.log4j.DailyRollingFileAppender">
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<param name="File" value="/home/log/javalib-log4j-trace.log"/>
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<param name="Append" value="true"/>
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<!-- 每天重新生成日志文件 -->
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<param name="DatePattern" value="'.'yyyy-MM-dd'.log'"/>
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<layout class="org.apache.log4j.PatternLayout">
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<param name="ConversionPattern"
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value="%d{yyyy-MM-dd HH:mm:ss,SSS\} [%-5p] [%t] %c{36\}.%M - %m%n"/>
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</layout>
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<filter class="org.apache.log4j.varia.LevelRangeFilter">
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<param name="levelMin" value="TRACE"/>
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<param name="levelMax" value="TRACE"/>
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<param name="AcceptOnMatch" value="true"/>
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</filter>
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</appender>
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<appender name="DEBUG-APPENDER" class="org.apache.log4j.DailyRollingFileAppender">
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<param name="File" value="/home/log/javalib-log4j-debug.log"/>
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<param name="Append" value="true"/>
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<!-- 每天重新生成日志文件 -->
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<param name="DatePattern" value="'.'yyyy-MM-dd'.log'"/>
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<layout class="org.apache.log4j.PatternLayout">
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<param name="ConversionPattern"
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value="%d{yyyy-MM-dd HH:mm:ss,SSS\} [%-5p] [%t] %c{36\}.%M - %m%n"/>
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</layout>
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<filter class="org.apache.log4j.varia.LevelRangeFilter">
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<param name="levelMin" value="DEBUG"/>
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<param name="levelMax" value="DEBUG"/>
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<param name="AcceptOnMatch" value="true"/>
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</filter>
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</appender>
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<appender name="INFO-APPENDER" class="org.apache.log4j.DailyRollingFileAppender">
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<param name="File" value="/home/log/javalib-log4j-info.log"/>
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<param name="Append" value="true"/>
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<!-- 每天重新生成日志文件 -->
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<param name="DatePattern" value="'.'yyyy-MM-dd'.log'"/>
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<layout class="org.apache.log4j.PatternLayout">
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<param name="ConversionPattern"
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value="%d{yyyy-MM-dd HH:mm:ss,SSS\} [%-5p] [%t] %c{36\}.%M - %m%n"/>
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</layout>
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<filter class="org.apache.log4j.varia.LevelRangeFilter">
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<param name="levelMin" value="INFO"/>
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<param name="levelMax" value="INFO"/>
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<param name="AcceptOnMatch" value="true"/>
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</filter>
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</appender>
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<appender name="WARN-APPENDER" class="org.apache.log4j.DailyRollingFileAppender">
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<param name="File" value="/home/log/javalib-log4j-warn.log"/>
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<param name="Append" value="true"/>
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<!-- 每天重新生成日志文件 -->
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<param name="DatePattern" value="'.'yyyy-MM-dd'.log'"/>
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<layout class="org.apache.log4j.PatternLayout">
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<param name="ConversionPattern"
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value="%d{yyyy-MM-dd HH:mm:ss,SSS\} [%-5p] [%t] %c{36\}.%M - %m%n"/>
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</layout>
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<filter class="org.apache.log4j.varia.LevelRangeFilter">
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<param name="levelMin" value="WARN"/>
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<param name="levelMax" value="WARN"/>
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<param name="AcceptOnMatch" value="true"/>
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</filter>
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</appender>
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<appender name="ERROR-APPENDER" class="org.apache.log4j.DailyRollingFileAppender">
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<param name="File" value="/home/log/javalib-log4j-error.log"/>
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<param name="Append" value="true"/>
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<!-- 每天重新生成日志文件 -->
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<param name="DatePattern" value="'.'yyyy-MM-dd'.log'"/>
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<layout class="org.apache.log4j.PatternLayout">
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<param name="ConversionPattern"
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value="%d{yyyy-MM-dd HH:mm:ss,SSS\} [%-5p] [%t] %c{36\}.%M - %m%n"/>
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</layout>
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<filter class="org.apache.log4j.varia.LevelRangeFilter">
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<param name="levelMin" value="ERROR"/>
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<param name="levelMax" value="ERROR"/>
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<param name="AcceptOnMatch" value="true"/>
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</filter>
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</appender>
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<appender name="CONSOLE-APPENDER" class="org.apache.log4j.ConsoleAppender">
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<layout class="org.apache.log4j.PatternLayout">
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<param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss,SSS\} [%-5p] [%t] %c{36\}.%M - %m%n"/>
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</layout>
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<!--过滤器设置输出的级别-->
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<filter class="org.apache.log4j.varia.LevelRangeFilter">
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<param name="levelMin" value="trace"/>
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<param name="levelMax" value="error"/>
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<param name="AcceptOnMatch" value="true"/>
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</filter>
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</appender>
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<appender name="ALL-APPENDER" class="org.apache.log4j.DailyRollingFileAppender">
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<param name="File" value="/home/log/javalib-log4j-all.log"/>
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<param name="Append" value="true"/>
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<!-- 每天重新生成日志文件 -->
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<param name="DatePattern" value="'.'yyyy-MM-dd'.log'"/>
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<layout class="org.apache.log4j.PatternLayout">
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<param name="ConversionPattern"
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value="%d{yyyy-MM-dd HH:mm:ss,SSS\} [%-5p] [%t] %c{36\}.%M - %m%n"/>
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</layout>
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<filter class="org.apache.log4j.varia.LevelRangeFilter">
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<param name="levelMin" value="TRACE"/>
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<param name="levelMax" value="ERROR"/>
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<param name="AcceptOnMatch" value="true"/>
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</filter>
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</appender>
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<root>
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<level value="ALL"/>
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<appender-ref ref="CONSOLE-APPENDER"/>
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<appender-ref ref="ALL-APPENDER"/>
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<appender-ref ref="TRACE-APPENDER"/>
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<appender-ref ref="DEBUG-APPENDER"/>
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<appender-ref ref="INFO-APPENDER"/>
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<appender-ref ref="WARN-APPENDER"/>
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<appender-ref ref="ERROR-APPENDER"/>
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</root>
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</log4j:configuration>

‎codes/javalib/log/pom.xml‎

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<!-- RELATIONSHIP SETTINGS BEGIN -->
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<modules>
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<module>logback-demo</module>
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<module>log4j-demo</module>
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</modules>
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<!-- RELATIONSHIP SETTINGS END -->
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