SpringBoot中使用log4j进行日志管理

布满荆棘的人生 2023-10-18 16:26 83阅读 0赞

## 场景 ##

SpringBoot项目中使用log4j进行日志管理。

## 实现 ##

1.因为SpringBoot默认是使用logback，所以要修改pom.xml 过滤掉自带的spring-boot-starter-logging,然后添加spring-boot-starter-log4j依赖包。

<dependency>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter</artifactId>
          <exclusions>
           <exclusion>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-logging</artifactId>
           </exclusion>
          </exclusions>
      </dependency>  
      <dependency>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-starter-log4j</artifactId>
           <version>1.3.8.RELEASE</version>
      </dependency>

2.在项目的src/main/resources下新建log4j.prpperties文件

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70][]

代码如下

### set log levels ###   
    log4j.rootLogger = INFO,DEBUG, console, infoFile, errorFile ,debugfile,mail
    LocationInfo=true   
     
    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{yyyy-MM-dd HH:mm:ss,SSS}]-[%p]:%m   %x %n
     
    log4j.appender.infoFile = org.apache.log4j.DailyRollingFileAppender 
    log4j.appender.infoFile.Threshold = INFO 
    log4j.appender.infoFile.File = D:/logs/log.log
    log4j.appender.infoFile.DatePattern = '.'yyyy-MM-dd'.log' 
    log4j.appender.infoFile.Append=true
    log4j.appender.infoFile.layout = org.apache.log4j.PatternLayout 
    log4j.appender.infoFile.layout.ConversionPattern =[%d{yyyy-MM-dd HH:mm:ss,SSS}]-[%p]:%m  %x %n
     
    log4j.appender.errorFile = org.apache.log4j.DailyRollingFileAppender 
    log4j.appender.errorFile.Threshold = ERROR 
    log4j.appender.errorFile.File = D:/logs/error.log 
    log4j.appender.errorFile.DatePattern = '.'yyyy-MM-dd'.log' 
    log4j.appender.errorFile.Append=true 
    log4j.appender.errorFile.layout = org.apache.log4j.PatternLayout 
    log4j.appender.errorFile.layout.ConversionPattern =[%d{yyyy-MM-dd HH:mm:ss,SSS}]-[%p]:%m  %x %n
    
    log4j.appender.debugfile = org.apache.log4j.DailyRollingFileAppender 
    log4j.appender.debugfile.Threshold = DEBUG 
    log4j.appender.debugfile.File = D:/logs/debug.log 
    log4j.appender.debugfile.DatePattern = '.'yyyy-MM-dd'.log' 
    log4j.appender.debugfile.Append=true 
    log4j.appender.debugfile.layout = org.apache.log4j.PatternLayout 
    log4j.appender.debugfile.layout.ConversionPattern =[%d{yyyy-MM-dd HH:mm:ss,SSS}]-[%p]:%m  %x %n

3.在controller下新建TestLog4jController.java

package com.example.demo.controller;
    
    import org.apache.log4j.Logger;
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.ResponseBody;
    
    @Controller
    @EnableAutoConfiguration
    public class TestLog4jController {
     
     private static Logger log = Logger.getLogger(TestLog4jController.class);
     @ResponseBody
     @RequestMapping("/testsLog4j")
     public String tests() {
      log.debug("debug日志");
      log.info("info日志");
      log.warn("warn日志");
      log.error("error日志");
      return "testsLog4j";
     }
     
     public static void main(String[] args) {
      SpringApplication.run(TestLog4jController.class, args);
     }
    }

导包时要注意不要导错包

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 1][]

4.运行结果

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 2][]

打开浏览器输入：

[http://localhost:8080/testsLog4j][http_localhost_8080_testsLog4j]

![20190329215721725.jpg][]

控制台输出

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 3][]

5.找到配置的日志文件的输出目录

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 4][]

## 源码下载 ##

[https://download.csdn.net/download/badao\_liumang\_qizhi/11070183][https_download.csdn.net_download_badao_liumang_qizhi_11070183]

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[http_localhost_8080_testsLog4j]: http://localhost:8080/testsLog4j
[20190329215721725.jpg]: https://img-blog.csdnimg.cn/20190329215721725.jpg
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[https_download.csdn.net_download_badao_liumang_qizhi_11070183]: https://download.csdn.net/download/badao_liumang_qizhi/11070183