SSM环境下配置log4j输出sql和异常到控制台和本地日志文件中

1.引入日志依赖包

 <!--解决Spring使用slf4j输出日志与log4j冲突的问题-->
 <dependency>
     <groupId>org.slf4j</groupId>
     <artifactId>slf4j-log4j12</artifactId>
     <version>1.6.6</version>
 </dependency>
 <!-- log4j的包 -->
 <dependency>
     <groupId>org.slf4j</groupId>
     <artifactId>slf4j-api</artifactId>
     <version>1.6.6</version>
 </dependency>
 <dependency>
     <groupId>log4j</groupId>
     <artifactId>log4j</artifactId>
     <version>1.2.16</version>
 </dependency>  

2.web.xml中的配置

<!-- log4j 配置 -->
<context-param>
  <param-name>log4jConfigLocation</param-name>
  <param-value>classpath:log4j.properties</param-value>
  <!-- <param-value>/WEB-INF/log4j.xml</param-value> -->
</context-param>
<listener>
   <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
</listener>

3.log4j.properties

log4j.rootLogger=INFO,Console,File

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 = \r\n\u7EA7\u522B\:%p\r\n\u4FE1\u606F\:%m\r\n\u4F4D\u7F6E\:%l\r\n\u65F6\u95F4\:%d\r\n\u7C7B\u76EE\:%c\r\n\u7EBF\u7A0B\:%t\r\n  

#cn.bs.nl.mapper映射目录路径
log4j.logger.cn.bs.nl.mapper=DEBUG

log4j.appender.File=org.apache.log4j.RollingFileAppender
log4j.appender.File.File=logs/ssm.log

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}][%c]%m%n

参考链接：

http://blog.csdn.net/github_32658299/article/details/54288923

https://www.cnblogs.com/zyw-205520/p/5416412.html

https://www.cnblogs.com/wangzhuxing/p/7753420.html