log4j框架搭建

<!-- 日志处理 -->
<dependency>
   <groupId>commons-logging</groupId>
   <artifactId>commons-logging</artifactId>
</dependency>
<dependency>
   <groupId>org.slf4j</groupId>
   <artifactId>slf4j-log4j12</artifactId>
</dependency>

log4j.properties

log4j.rootLogger = debug,stdout,fout
 
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
 
log4j.appender.stdout.Target = System.out
log4j.appender.stdout.Threshold = debug
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d [%-5p]%l %m%n
 
log4j.appender.fout = org.apache.log4j.DailyRollingFileAppender
log4j.appender.fout.File = log/log.log
 
log4j.appender.fout.DatePattern=yyyy-MM-dd'.log'
log4j.appender.fout.Append = true
log4j.appender.fout.Threshold = DEBUG
log4j.appender.fout.layout = org.apache.log4j.PatternLayout
log4j.appender.fout.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}[%-5p]%l %m%n

web.xml中配置监听器并引入配置文件

<!--log4j配置文件开始-->
<context-param>
   <param-name>log4jConfigLocation</param-name>
   <param-value>classpath:config/log4j.properties</param-value>
</context-param>
<listener>
   <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
</listener>

通常我们将日志定义在BaseController，BaseService中，由所有的子类去使用。

protected final Logger log =LoggerFactory.getLogger(this.getClass());

使用

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@Component
public class DataResolve implements ApplicationRunner {
Logger log = LoggerFactory.getLogger(DataResolve.class);
while (true) {
try {
} catch (CntenException e) {
log.info("redis connect fail!");
}
}
}