简单的日志分类验证（logback+slf4j）xml形式的

一，如果使用maven项目那就依赖以下几个包：

<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-core</artifactId>
<version>1.1.3</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>1.1.3</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.12</version>
</dependency>二，建测试类：
package logger;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class LogDemo {
private static final Logger logger = LoggerFactory.getLogger(LogDemo.class);

public static void main(String[] args) {
logger.trace("最开始的日志记录！");
int num = 1;
logger.debug("能不能打印初始值！");
try {
int c ;
for(int i=1;i<3;i++){
c = num++;
logger.info("输出info的值："+c);
}
logger.warn("能不能输出warn信息！");
logger.error("能不能输出error信息！");
} catch (Exception e) {
logger.error("错误信息的打印！");
}
}
}
第三，加配置文件在这个我测试放置的位置：logback.properties内容是--

logback.path=logs/
logback.level=debug

logback.xml文件内容是--

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<property resource="logback.properties" />
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender" level="all">
<encoder>
<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
</encoder>
</appender>
<appender name="FILE-DEBUG" class="ch.qos.logback.core.rolling.RollingFileAppender">
<filter class="ch.qos.logback.classic.filter.LevelFilter">
<level>debug</level>
<OnMismatch>DENY</OnMismatch>
<OnMatch>ACCEPT</OnMatch>
</filter>
<File>${logback.path}/dsyncServer-debug.log</File>
<rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
<FileNamePattern>${logback.path}/dsyncServer-debug.log.%i.bak</FileNamePattern>
<MinIndex>1</MinIndex>
<MaxIndex>12</MaxIndex>
</rollingPolicy>

<triggeringPolicy
class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
<MaxFileSize>1MB</MaxFileSize>
</triggeringPolicy>
<layout class="ch.qos.logback.classic.PatternLayout">
<Pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</Pattern>
</layout>
</appender>
<appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
<filter class="ch.qos.logback.classic.filter.LevelFilter">
<level>info</level>
<OnMismatch>DENY</OnMismatch>
<OnMatch>ACCEPT</OnMatch>
</filter>
<File>${logback.path}/dsyncServer.log</File>
<rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
<FileNamePattern>${logback.path}/dsyncServer.log.%i.bak</FileNamePattern>
<MinIndex>1</MinIndex>
<MaxIndex>12</MaxIndex>
</rollingPolicy>

<triggeringPolicy
class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
<MaxFileSize>1MB</MaxFileSize>
</triggeringPolicy>
<layout class="ch.qos.logback.classic.PatternLayout">
<Pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</Pattern>
</layout>
</appender>

<appender name="FILE-ERROR" class="ch.qos.logback.core.rolling.RollingFileAppender">
<filter class="ch.qos.logback.classic.filter.LevelFilter">
<level>ERROR</level>
<OnMismatch>DENY</OnMismatch>
<OnMatch>ACCEPT</OnMatch>
</filter>

<File>${logback.path}/dsyncServer-err.log</File>
<rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
<FileNamePattern>${logback.path}/dsyncServer-err.log.%i.bak</FileNamePattern>
<MinIndex>1</MinIndex>
<MaxIndex>3</MaxIndex>
</rollingPolicy>
<triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
<MaxFileSize>1MB</MaxFileSize>
</triggeringPolicy>
<layout class="ch.qos.logback.classic.PatternLayout">
<Pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</Pattern>
</layout>
</appender>

<appender name="FILE-WARN" class="ch.qos.logback.core.rolling.RollingFileAppender">
<filter class="ch.qos.logback.classic.filter.LevelFilter">
<level>warn</level>
<OnMismatch>DENY</OnMismatch>
<OnMatch>ACCEPT</OnMatch>
</filter>

<File>${logback.path}/dsyncServer-warn.log</File>
<rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
<FileNamePattern>${logback.path}/dsyncServer-warn.log.%i.bak</FileNamePattern>
<MinIndex>1</MinIndex>
<MaxIndex>3</MaxIndex>
</rollingPolicy>
<triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
<MaxFileSize>1MB</MaxFileSize>
</triggeringPolicy>
<layout class="ch.qos.logback.classic.PatternLayout">
<Pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</Pattern>
</layout>
</appender>

<root>
<level value="${logback.level}" />
<appender-ref ref="STDOUT" />
<appender-ref ref="FILE" />
<appender-ref ref="FILE-ERROR" />
<appender-ref ref="FILE-WARN" />
<appender-ref ref="FILE-DEBUG" />
</root>

</configuration>

简单的测试成功