SpringBoot学习笔记：整合sl4j+log4j

Posted 2022-12-06 听风者-better

1.添加log4j依赖

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
    <!-- 排除自带的logback依赖 -->
    <exclusions>
        <exclusion>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-logging</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<!-- Spring Boot log4j依赖 -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-log4j</artifactId>
    <version>1.3.8.RELEASE</version>
</dependency>

2.创建log4j.properties文件

#配置日志根Logger
log4j.rootLogger=INFO,stdout,file,errorLog

#输出到控制台的配置
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%dyyyy-MM-dd HH:mm:ss %-5p %c1:%L - %m%n

#输出到文件的配置
log4j.appender.file=org.apache.log4j.DailyRollingFileAppender
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.DatePattern='.'yyyy-MM-dd-HH-mm
log4j.appender.file.layout.ConversionPattern=%dyyyy-MM-dd HH:mm:ss,SSS %5p %c1:%L - %m%n
log4j.appender.file.file=/logs/springboot.log

# ERROR级别输出到特定的日志文件中
log4j.logger.error=errorLog
# error日志输出
log4j.appender.errorLog=org.apache.log4j.DailyRollingFileAppender
log4j.appender.errorLog.file=/logs/springboot-error.log
log4j.appender.errorLog.DatePattern='.'yyyy-MM-dd
log4j.appender.errorLog.Threshold = ERROR
log4j.appender.errorLog.layout=org.apache.log4j.PatternLayout
log4j.appender.errorLog.layout.ConversionPattern=%dyyyy-MM-dd HH:mm:ss,SSS %5p %c1:%L - %m%n

3.创建测试方法

package com.twy.springbootsl4j.controller;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @ClassName TestController
 * @Description
 * @author twy
 * @date 2020-05-11 22:14
 */
@RestController
public class TestController 

    private Logger logger = LoggerFactory.getLogger(TestController.class);

    @GetMapping("/test")
    public void test()
        logger.info("sl4j info");
        logger.warn("sl4j warn");
        logger.debug("sl4j debug");
        logger.error("sl4j error");
    

4.测试结果

生成对应的日志文件：

全部日志文件：

错误日志文件：