網上的資料眼花繚亂 , 因爲太詳細所以懶得看,下面我就說最簡單的方式,也是項目中常常使用的方式!
1)下載jar包
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
2)新建 log4j.xml
src/main/resources/log4j.xml 內容如下:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
<appender name="console" class="org.apache.log4j.ConsoleAppender">
<param name="Target" value="System.out" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="[CateringLog] %d{yyyy-MM-dd HH:mm:ss,SSS} %-5p %c - %m%n" />
</layout>
</appender>
<appender class="org.apache.log4j.RollingFileAppender" name="file">
<param name="File" value="d:/companyProject/logs/catering.log" />
<param name="Append" value="true" />
<param name="MaxFileSize" value="1024KB" />
<param name="MaxBackupIndex" value="5" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="[CateringLog] %d{yyyy-MM-dd HH:mm:ss,SSS} %-5p %c - %m%n" />
</layout>
</appender>
<root>
<priority value="debug" />
<appender-ref ref="console" />
<appender-ref ref="file" />
</root>
<!--通過<logger></logger>的定義可以將各個包中的類日誌輸出到不同的日誌文件中-->
<logger name="org.springframework">
<level value="ERROR" />
</logger>
<logger name="org.mybatis.spring">
<level value="ERROR" />
</logger>
<logger name="net.sf.ehcache">
<level value="ERROR" />
</logger>
<logger name="com.mchange.v2">
<level value="ERROR" />
</logger>
<logger name="java.sql">
<level value="debug" />
</logger>
</log4j:configuration>
3)啓動web 程序 或者 啓動單元測試,你就能在 d:companyProject/catering.logs 日誌 , 同時控制檯也會輸出你要的sql信息