slf4j + Logback use

Others 2022-05-26 17:09:17 views: 0
Use logback to easily manage logs: http://blog.csdn.net/mydeman/article/details/6716925
Logback log usage details: http://www.cnblogs.com/davidwang456/p/4448011.html
Introduction to logback - configuration : http://sunney2010.iteye.com/blog/1404723
Detailed explanation of slf4j + Logback: http://donald-draper.iteye.com/admin/blogs/2332433
Required jar
slf4j-api.jar
logback-core.jar
logback -classic.jar
log4j-over-slf4j.jar
jcl104-over-slf4j.jar
janino.jar
test main class: 
package org;

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

public class testLogback {
	private static Logger log = LoggerFactory.getLogger(testSFL4J.class);
	   public static void main(String[] args) {
		   log.debug("=======test root=========");
		   log.info("========test daily level info=========");
		   log.warn("========test warn=========");
		   log.error("========test error=========");
  }
}

如果添加Log4j的相关jar包，则控制台输出为：
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/E:/lib/slf4j-log4j12-1.7.9.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/E:/lib/logback-classic-0.9.27.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]
[DEBUG] 2016-10-23 15:14:08,549 org.testLogback =======test root=========
[INFO ] 2016-10-23 15:14:08,549 org.testLogback ========test daily level info=========
[WARN ] 2016-10-23 15:14:08,549 org.testLogback ========test warn=========
[ERROR] 2016-10-23 15:14:08,549 org.testLogback =======test error==========
As can be seen from the above information, when there are multiple StaticLoggerBinder implementations, The default is Log4jLoggerFactory,
remove the related jar package of Log4j, and control the output:
15:24:53,431 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Could NOT find resource [logback.groovy]
15:24:53,432 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Could NOT find resource [logback-test.xml]
15:24:53,432 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Found resource [logback.xml] at [file:/F:/Myeclipse/Log/bin/logback.xml]
15:24:53,477 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - debug attribute not set
15:24:53,494 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.ConsoleAppender]
15:24:53,497 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [stdout]
15:24:53,506 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property
15:24:53,542 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.rolling.RollingFileAppender]
15:24:53,543 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [file—debug]
15:24:53,555 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy - No compression will be used
15:24:53,555 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy - Will use the pattern F:/logback/debug.%d{yyyy-MM-dd}.log for the active file
15:24:53,558 |-INFO in c.q.l.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy - The date pattern is 'yyyy-MM-dd' from file name pattern 'F:/logback/debug.%d{yyyy-MM-dd}.log'.
15:24:53,558 |-INFO in c.q.l.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy - Roll-over at midnight.
15:24:53,560 |-INFO in c.q.l.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy - Setting initial period to Sun Oct 23 15:24:53 CST 2016
15:24:53,560 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property
15:24:53,561 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[file—debug] - Active log file name: F:/logback/debug.2016-10-23.log
15:24:53,561 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[file—debug] - File property is set to [null]
15:24:53,564 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.rolling.RollingFileAppender]
15:24:53,564 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [file—error]
15:24:53,565 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy - No compression will be used
15:24:53,565 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy - Will use the pattern F:/logback/error.%d{yyyy-MM-dd}.log for the active file
15:24:53,566 |-INFO in c.q.l.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy - The date pattern is 'yyyy-MM-dd' from file name pattern 'F:/logback/error.%d{yyyy-MM-dd}.log'.
15:24:53,566 |-INFO in c.q.l.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy - Roll-over at midnight.
15:24:53,566 |-INFO in c.q.l.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy - Setting initial period to Sun Oct 23 15:24:53 CST 2016
15:24:53,566 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property
15:24:53,566 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[file—error] - Active log file name: F:/logback/error.2016-10-23.log
15:24:53,566 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[file—error] - File property is set to [null]
15:24:53,566 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.rolling.RollingFileAppender]
15:24:53,566 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [file-str]
15:24:53,568 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [ch.qos.logback.classic.boolex.JaninoEventEvaluator] for [evaluator] property
15:24:53,910 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy - No compression will be used
15:24:53,910 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy - Will use the pattern F:/logback/contains.%d{yyyy-MM-dd}.log for the active file
15:24:53,910 |-INFO in c.q.l.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy - The date pattern is 'yyyy-MM-dd' from file name pattern 'F:/logback/contains.%d{yyyy-MM-dd}.log'.
15:24:53,910 |-INFO in c.q.l.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy - Roll-over at midnight.
15:24:53,910 |-INFO in c.q.l.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy - Setting initial period to Sun Oct 23 15:24:53 CST 2016
15:24:53,910 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property
15:24:53,911 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[file-str] - Active log file name: F:/logback/contains.2016-10-23.log
15:24:53,911 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[file-str] - File property is set to [null]
15:24:53,912 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.classic.db.DBAppender]
15:24:53,963 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [db]
15:24:53,968 |-INFO in ch.qos.logback.classic.joran.action.LevelAction - java.sql.Connection level set to DEBUG
15:24:53,968 |-INFO in ch.qos.logback.classic.joran.action.LevelAction - java.sql.Statement level set to DEBUG
15:24:53,968 |-INFO in ch.qos.logback.classic.joran.action.LevelAction - com.ibatis level set to DEBUG
15:24:53,968 |-INFO in ch.qos.logback.classic.joran.action.LevelAction - com.ibatis.common.jdbc.SimpleDataSource level set to DEBUG
15:24:53,968 |-INFO in ch.qos.logback.classic.joran.action.LevelAction - com.ibatis.common.jdbc.ScriptRunner level set to DEBUG
15:24:53,968 |-INFO in ch.qos.logback.classic.joran.action.LevelAction - com.ibatis.sqlmap.engine.impl.SqlMapClientDelegate level set to DEBUG
15:24:53,968 |-INFO in ch.qos.logback.classic.joran.action.LevelAction - com.danga.MemCached level set to INFO
15:24:53,968 |-INFO in ch.qos.logback.classic.joran.action.LevelAction - org.springframework.test level set to DEBUG
15:24:53,968 |-INFO in ch.qos.logback.classic.joran.action.LevelAction - org.apache.struts2 level set to DEBUG
15:24:53,968 |-INFO in ch.qos.logback.classic.joran.action.RootLoggerAction - Setting level of ROOT logger to DEBUG
15:24:53,968 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [stdout] to Logger[ROOT]
15:24:53,970 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [file—debug] to Logger[ROOT]
15:24:53,970 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [file—error] to Logger[ROOT]
15:24:53,970 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [file-str] to Logger[ROOT]
15:24:53,970 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [db] to Logger[ROOT]

2016-10-23 15:24:53,976 [main] DEBUG org.testLogback - =======test root=========
2016-10-23 15:24:53,979 [main] INFO  org.testLogback - ========test daily level info=========
2016-10-23 15:24:53,979 [main] WARN org.testLogback - =======test warn=========
2016-10-23 15:24:53,979 [main] ERROR org.testLogback - ========test error=========

Go to the F drive logback folder, you can see the relevant log file
contains.2016-10-23.log
debug.2016 -10-23.log
2016-10-23 15:24:53,976 [main] DEBUG org.testLogback - =======test root==========
error.2016-10-23. log
2016-10-23 15:24:53,979 [main] ERROR org.testLogback - =======test error==========
My logback.xml file is as follows: 
<?xml version="1.0" encoding="UTF-8"?>
 <configuration>
     <!-- console output -->
     <appender name="stdout" class="ch.qos.logback.core.ConsoleAppender">
         <encoder>
             <pattern>%date [%thread] %-5level %logger{80} - %msg%n</pattern>
         </encoder>
     </appender>
 
     <!-- Time rolling output level is DEBUG log -->
     <appender name="file—debug"
         class="ch.qos.logback.core.rolling.RollingFileAppender">
         <filter class="ch.qos.logback.classic.filter.LevelFilter">
             <level>DEBUG</level>
             <onMatch>ACCEPT</onMatch>
             <onMismatch>DENY </onMismatch>
         </filter>
         <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
             <FileNamePattern>F:/logback/debug.%d{yyyy-MM-dd}.log</FileNamePattern>
             <MaxHistory>30</MaxHistory>
         </rollingPolicy>
         <encoder>
             <pattern>%date [%thread] %-5level %logger{80} - %msg%n</pattern>
             <charset>UTF-8</charset>
         </encoder>
     </appender>
 
     <!-- Time scrolling output level is ERROR log -->
     <appender name="file—error"
         class="ch.qos.logback.core.rolling.RollingFileAppender">
         <filter class="ch.qos.logback.classic.filter.LevelFilter">
             <level>ERROR</level>
             <onMatch>ACCEPT</onMatch>
             <onMismatch>DENY </onMismatch>
         </filter>
         <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
             <FileNamePattern>F:/logback/error.%d{yyyy-MM-dd}.log</FileNamePattern>
             <MaxHistory>30</MaxHistory>
         </rollingPolicy>
         <encoder>
             <pattern>%date [%thread] %-5level %logger{80} - %msg%n</pattern>
             <charset>UTF-8</charset>
         </encoder>
     </appender>
 
     <!-- Specific filter logs containing a string -->
     <appender name="file-str"
         class="ch.qos.logback.core.rolling.RollingFileAppender">
         <filter class="ch.qos.logback.core.filter.EvaluatorFilter">
             <evaluator>
                 <expression>message.contains("str")</expression>
             </evaluator>
             <onMatch>ACCEPT</onMatch>
             <onMismatch>DENY</onMismatch>
         </filter>
         <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
             <FileNamePattern>F:/logback/contains.%d{yyyy-MM-dd}.log
             </FileNamePattern>
             <MaxHistory>30</MaxHistory>
         </rollingPolicy>
         <encoder>
             <pattern>%date [%thread] %-5level %logger{80} - %msg%n</pattern>
         </encoder>
     </appender>
 
     <!-- database output -->
     <appender name="db" class="ch.qos.logback.classic.db.DBAppender">
         <connectionSource
             class="ch.qos.logback.core.db.DriverManagerConnectionSource">
             <driverClass>com.mysql.jdbc.Driver</driverClass>
             <url>jdbc:mysql://localhost:3306/test</url>
             <user>root</user>
             <password>123456</password>
         </connectionSource>
     </appender>
 
     <logger name="java.sql.Connection">
         <level value="DEBUG" />
     </logger>
     <logger name="java.sql.Statement">
         <level value="DEBUG" />
     </logger>
     <logger name="com.ibatis">
         <level value="DEBUG" />
     </logger>
     <logger name="com.ibatis.common.jdbc.SimpleDataSource">
         <level value="DEBUG" />
     </logger>
     <logger name="com.ibatis.common.jdbc.ScriptRunner">
         <level value="DEBUG" />
     </logger>
     <logger name="com.ibatis.sqlmap.engine.impl.SqlMapClientDelegate">
         <level value="DEBUG" />
     </logger>
     <logger name="com.danga.MemCached">
         <level value="INFO" />
     </logger>
     <logger name="org.springframework.test">
         <level value="DEBUG" />
     </logger>
     <logger name="org.apache.struts2">
         <level value="DEBUG" />
     </logger>
     <root level="DEBUG">
         <appender-ref ref="stdout" />
         <appender-ref ref="file—debug" />
         <appender-ref ref="file—error" />
         <appender-ref ref="file-str" />
         <appender-ref ref="db" />
     </root>
</configuration>

Summary:
From the above test, it can be seen that logback logs can be output to different files according to the type of the log, instead of log4j to output logs greater than or equal to the Appender log level.



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