固定套路--->log4j日志运用-Maven

1、pom.xml导包

<dependencies>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
    </dependencies>

2、需要手动在java/resources下创建，配置文件名为log4j.properties

### set log levels ###
log4j.rootLogger = DEBUG,Console,File

###  输出到控制台  ###
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.Target=System.out
log4j.appender.Console.layout=org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=[%d{yy/MM/dd HH:mm:ss:SSS}]-%l:%m%n

### 输出到日志文件 ###
log4j.appender.File=org.apache.log4j.RollingFileAppender
log4j.appender.File.File=${project}src\main\resources\app.log
log4j.appender.File.MaxFileSize=10MB
log4j.appender.File.Threshold=ALL
log4j.appender.File.layout=org.apache.log4j.PatternLayout
log4j.appender.File.layout.ConversionPattern=[%p][%d{yyyy-MM-dd HH:mm:ss,SSS}][%c]%m%n

3、Mybatis-config.xml 配置Settings

<settings>
        <setting name="logImpl" value="LOG4J"/>
    </settings>

settings在properties，typeAlias之间

4、在JAVA.class文件下导包，并声明

import org.apache.log4j.Logger;
public class test {
    static Logger logger=Logger.getLogger(test.class);
     public void log4j(){
        logger.info("info:-------");
        logger.debug("debug:-------");
    }
}