springboot整合log4j日志记录

1、在src/main/resources下面新建一个名为log4j.properties的文件：

### direct log messages to stdout ###
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n

### direct messages to file mylog.log ###
log4j.appender.file=org.apache.log4j.FileAppender
log4j.appender.file.File=c:/mylog.log
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n

### set log levels - for more verbose logging change 'info' to 'debug' ###

log4j.rootLogger=info, stdout

2.在pom文件中添加log4j依赖的jar包：

    <!-- springboot   整合log4j -->
	<dependency>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-log4j</artifactId>
		<version>1.3.8.RELEASE</version>
	</dependency>

3.在controller中我们可以引入日志，进行打印，

@Controller
public class JspController {
	
	private static final Logger logger = LoggerFactory.getLogger(JspController.class);
    //引入日志时需要导入的Jar是：import org.slf4j.Logger;和import org.slf4j.LoggerFactory;
	
	@RequestMapping("/jspIndex")
	public String jspIndex() {
		
		logger.info("springboot 整合Log4j");
		return "jspSpringboot";
	}

}

4.这样我们再去访问controller时就会在控制台打印log: