slf4j + log4j 須要的依賴

正確的依賴

 <!-- slf4j 依賴包 -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.25</version>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.7.25</version>
        </dependency>

 

#這個是本身項目中使用的一個配置，方便拿來直接使用。簡單的配置，若是想要添加詳細配置須要去找資料，看一下log4j的具體參數配，這裏暫時沒有。

log4j.rootLogger=info,consoleLog,logfile

# Console output...
log4j.appender.consoleLog=org.apache.log4j.ConsoleAppender
log4j.appender.consoleLog.layout=org.apache.log4j.PatternLayout
log4j.appender.consoleLog.layout.ConversionPattern=[%p]-%-d{HH:mm:ss}-%c{1} - %m%n

# file output...error one day
log4j.appender.logfile=org.apache.log4j.DailyRollingFileAppender
log4j.appender.logfile.DatePattern='.'yyyy-MM-dd'.log'
log4j.appender.logfile.File=${catalina.base}/jfinal_mac.log
log4j.appender.logfile.Threshold = error
log4j.appender.logfile.layout=org.apache.log4j.PatternLayout
log4j.appender.logfile.layout.ConversionPattern= [%p]-%-d{HH:mm:ss}-%c{1} - %m%n

# file output...info every hour
log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.DatePattern='.'yyyy-MM-dd-HH'.log'
log4j.appender.D.File = ${catalina.base}/logs/jfinal_mac.txt
log4j.appender.D.Append = true
log4j.appender.D.Threshold = info
log4j.appender.D.layout = org.apache.log4j.PatternLayout
log4j.appender.D.layout.ConversionPattern = [%p]-%-d{HH\:mm\:ss}-%c{1} - %m%n 

 

 

如下在配置時候出現的問題：

可能有的依賴版本不一樣，致使直接默認使用的式log4j2.xml  或  log4j2.json   

啓動是出現過問題：  

ERROR StatusLogger No log4j2 configuration file found. Using default configuration: logging only errors to the console. Set system property 'log4j2.debug' to show Log4j2 internal initialization logging.

使用的依賴是一下的：

<!-- slf4j 依賴包 --><dependency>    <groupId>org.slf4j</groupId>    <artifactId>slf4j-api</artifactId>    <version>1.7.25</version></dependency><dependency>    <groupId>org.apache.logging.log4j</groupId>    <artifactId>log4j-slf4j-impl</artifactId>    <version>2.9.1</version></dependency><dependency>    <groupId>org.apache.logging.log4j</groupId>    <artifactId>log4j-api</artifactId>    <version>2.9.1</version></dependency><dependency>    <groupId>org.apache.logging.log4j</groupId>    <artifactId>log4j-core</artifactId>    <version>2.9.1</version></dependency>不太清楚這幾個依賴怎麼搭配，記錄一下，最上邊的是可使用的，複製直接使用就能夠了。