java日誌管理（到markdown效果更佳）

#java日誌管理

***

###1.

##### (1) log4j 的maven依賴

```

<dependency>

<groupid>org.slf4j/<groupid>

<artifactid>slf4j-api/<artifactid>

<version>1.7.2/<version>

<dependency>

<groupid>org.slf4j/<groupid>

<artifactid>slf4j-log4j12/<artifactid>

<version>1.7.2/<version>

<dependency>

<groupid>log4j/<groupid>

<artifactid>log4j/<artifactid>

<version>1.2.17/<version>

```

##### (2)配置文件用log4j2.properties

```

#log4j.logger.org.springframework=DEBUG

################################################################################

#OFF,systemOut,logFile,logDailyFile,logRollingFile,logMail,logDB,ALL

log4j.rootLogger =ALL,systemOut,logFile,logDailyFile,logRollingFile,logMail,logDB

#輸出到控制檯

log4j.appender.systemOut = org.apache.log4j.ConsoleAppender

log4j.appender.systemOut.layout = org.apache.log4j.PatternLayout

log4j.appender.systemOut.layout.ConversionPattern = [%-5p][%-22d{yyyy/MM/dd HH:mm:ssS}][%l]%n%m%n

log4j.appender.systemOut.Threshold = DEBUG

log4j.appender.systemOut.ImmediateFlush = TRUE

log4j.appender.systemOut.Target = System.out

#輸出到文件

log4j.appender.logFile = org.apache.log4j.FileAppender

log4j.appender.logFile.layout = org.apache.log4j.PatternLayout

log4j.appender.logFile.layout.ConversionPattern = [%-5p][%-22d{yyyy/MM/dd HH:mm:ssS}][%l]%n%m%n

log4j.appender.logFile.Threshold = DEBUG

log4j.appender.logFile.ImmediateFlush = TRUE

log4j.appender.logFile.Append = TRUE

log4j.appender.logFile.File = ../Struts2/WebRoot/log/File/log4j_Struts.log

log4j.appender.logFile.Encoding = UTF-8

#按DatePattern輸出到文件

log4j.appender.logDailyFile = org.apache.log4j.DailyRollingFileAppender

log4j.appender.logDailyFile.layout = org.apache.log4j.PatternLayout

log4j.appender.logDailyFile.layout.ConversionPattern = [%-5p][%-22d{yyyy/MM/dd HH:mm:ssS}][%l]%n%m%n

log4j.appender.logDailyFile.Threshold = DEBUG

log4j.appender.logDailyFile.ImmediateFlush = TRUE

log4j.appender.logDailyFile.Append = TRUE

log4j.appender.logDailyFile.File = ../Struts2/WebRoot/log/DailyFile/log4j_Struts

log4j.appender.logDailyFile.DatePattern = '.'yyyy-MM-dd-HH-mm'.log'

log4j.appender.logDailyFile.Encoding = UTF-8

#設定文件大小輸出到文件

log4j.appender.logRollingFile = org.apache.log4j.RollingFileAppender

log4j.appender.logRollingFile.layout = org.apache.log4j.PatternLayout

log4j.appender.logRollingFile.layout.ConversionPattern = [%-5p][%-22d{yyyy/MM/dd HH:mm:ssS}][%l]%n%m%n

log4j.appender.logRollingFile.Threshold = DEBUG

log4j.appender.logRollingFile.ImmediateFlush = TRUE

log4j.appender.logRollingFile.Append = TRUE

log4j.appender.logRollingFile.File = ../Struts2/WebRoot/log/RollingFile/log4j_Struts.log

log4j.appender.logRollingFile.MaxFileSize = 1MB

log4j.appender.logRollingFile.MaxBackupIndex = 10

log4j.appender.logRollingFile.Encoding = UTF-8

#用Email發送日誌

log4j.appender.logMail = org.apache.log4j.net.SMTPAppender

log4j.appender.logMail.layout = org.apache.log4j.HTMLLayout

log4j.appender.logMail.layout.LocationInfo = TRUE

log4j.appender.logMail.layout.Title = Struts2 Mail LogFile

log4j.appender.logMail.Threshold = DEBUG

log4j.appender.logMail.SMTPDebug = FALSE

log4j.appender.logMail.SMTPHost = SMTP.163.com

log4j.appender.logMail.From = [email protected]

log4j.appender.logMail.To = [email protected]

#log4j.appender.logMail.Cc = [email protected]

#log4j.appender.logMail.Bcc = [email protected]

log4j.appender.logMail.SMTPUsername = xly3000

log4j.appender.logMail.SMTPPassword = 1234567

log4j.appender.logMail.Subject = Log4j Log Messages

#log4j.appender.logMail.BufferSize = 1024

#log4j.appender.logMail.SMTPAuth = TRUE

#將日誌登錄到MySQL數據庫

log4j.appender.logDB = org.apache.log4j.jdbc.JDBCAppender

log4j.appender.logDB.layout = org.apache.log4j.PatternLayout

log4j.appender.logDB.Driver = com.mysql.jdbc.Driver

log4j.appender.logDB.URL = jdbc:mysql://127.0.0.1:3306/db

log4j.appender.logDB.User = root

log4j.appender.logDB.Password = 123456

log4j.appender.logDB.Sql = INSERT INTOT_log4j(project_name,create_date,level,category,file_name,thread_name,line,all_category,message)values('xxx','%d{yyyy-MM-ddHH:mm:ss}','%p','%c','%F','%t','%L','%l','%m')

```

***

###2.

##### (1) log4j 2的maven依賴

```

<dependency>

<groupid>org.slf4j/<groupid>

<artifactid>slf4j-api/<artifactid>

<version>1.7.25/<version>

<dependency>

<groupid>org.apache.logging.log4j/<groupid>

<artifactid>log4j-core/<artifactid>

<version>2.7/<version>

<dependency>

<groupid>org.apache.logging.log4j/<groupid>

<artifactid>log4j-api/<artifactid>

<version>2.7/<version>

<dependency>

<groupid>org.apache.logging.log4j/<groupid>

<artifactid>log4j-slf4j-impl/<artifactid>

<version>2.7/<version>

```

##### (2)配置文件用log4j2.properties

```

status = warn

name = PropertiesConfig

property.dir=/Users/xxx/tmp/ //配置文件存放目錄

property.filename=temp //配置文件名稱

property.pattern=%d [%p] %C{1.}:%L - %m%n //輸出日誌的格式

filter.threshold.type = ThresholdFilter //

filter.threshold.level = debug //

appender.console.type = Console //

appender.console.name = STDOUT //

appender.console.layout.type = PatternLayout //

appender.console.layout.pattern = ${pattern} //輸出日誌的格式

appender.rolling.type = RollingRandomAccessFile //

appender.rolling.name = RollingRandomAccessFile //

appender.rolling.fileName = ${dir}${filename}.log //

appender.rolling.filePattern = ${dir}${filename}-%d{yyyy-MM-dd}.%i.log.zip //

appender.rolling.layout.type = PatternLayout //

appender.rolling.layout.pattern = ${pattern} //

appender.rolling.policies.type = Policies //

appender.rolling.policies.time.type = TimeBasedTriggeringPolicy //基於時間進行日誌的切割

appender.rolling.policies.size.type = SizeBasedTriggeringPolicy //基於文件大小進行日誌的切割

appender.rolling.policies.size.size = 200MB // 文件大小限制為200M

＃配置strategy用來刪除過多的日誌歸檔文件

appender.rolling.strategy.type = DefaultRolloverStrategy //

appender.rolling.strategy.max = 100 //指定計數的最大文件數，一旦計數達到最大值，過舊的文件就會被刪除，注意：不要認為max參數是需要保留的日誌文件的最大數目。

appender.rolling.strategy.delete.type = Delete //

appender.rolling.strategy.delete.basePath = ${dir} //目錄掃描開始路徑

appender.rolling.strategy.delete.maxDepth = 2 //掃描的最大目錄深度。0表示basePath指定的文件自身。Integer.MAX_VALUE表示掃描所有的目錄層。默認值為1，表示僅掃描basePath下的文件

appender.rolling.strategy.delete.condition.type = IfLastModified //判斷文件的修改時間是否早於指定的duration

appender.rolling.strategy.delete.condition.age = 31D //

rootLogger.level = info //

rootLogger.appenderRef.console.ref = STDOUT //

rootLogger.appenderRef.rolling.ref = RollingRandomAccessFile //

```

***

###3.

以上兩個版本的配置,都是實用了slf4j,也是程序的發展趨勢,這種以接口為模版的日誌實現方式儘可能的降低了偶和性,建議使用log4j2, log4j已經被升級到了log4j2,兩個的配置略有不同,但是都支持properties,xml的格式,兩個的配置文件只需要放到對應的resource目錄下即可,工程會自動加載相應文件名的日誌文件。log4j的官方文檔已經很少了,並且官方也極力推薦log4j2版本的日誌實現,性能有了很大的提升,自動重新加載配置,Java 8 Lambda支持,自定義日誌級別,更多詳情請參考[log4j2的官方地址](http://logging.apache.org/log4j/2.x/)