SpringBoot2.x整合Log4j

偏执的太偏执、 2022-05-12 09:52 272阅读 0赞

# SpringBoot2.x整合log4j #

在项目开发过程中，日志是必不可少的，此文将讲解SpringBoot2.x中log4j的整合。

1：引入依赖jar包

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 <td style="vertical-align:top;width:414.8pt;"> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;dependency&gt; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;artifactId&gt;spring-boot-starter-log4j&lt;/artifactId&gt; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;version&gt;1.3.8.RELEASE&lt;/version&gt; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;/dependency&gt; </td> 
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2：增加log4j.properties配置文件

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 <td style="vertical-align:top;width:414.8pt;"> # LOG4J配置 log4j.rootCategory=INFO, stdout, file &nbsp; # 控制台输出 log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.layout=org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern=%d{ yyyy-MM-dd HH:mm:ss,SSS} %5p %c{1}:%L - %m%n &nbsp; # root日志输出到文件 log4j.appender.file=org.apache.log4j.DailyRollingFileAppender log4j.appender.file.file=/logsdata/logs/springboot-log4j-all.log log4j.appender.file.DatePattern='.'yyyy-MM-dd log4j.appender.file.layout=org.apache.log4j.PatternLayout log4j.appender.file.layout.ConversionPattern=%d{ yyyy-MM-dd HH:mm:ss,SSS} %5p %c{1}:%L - %m%n &nbsp; # 按不同package进行输出 # com.micai包下的日志配置 log4j.category.com.micai=DEBUG, didifile # com.micai下的日志输出 log4j.appender.didifile=org.apache.log4j.DailyRollingFileAppender log4j.appender.didifile.file=/logsdata/logs/springboot-log4j-my.log log4j.appender.didifile.DatePattern='.'yyyy-MM-dd log4j.appender.didifile.layout=org.apache.log4j.PatternLayout log4j.appender.didifile.layout.ConversionPattern=%d{ yyyy-MM-dd HH:mm:ss,SSS} %5p %c{1}:%L ---- %m%n &nbsp; # ERROR级别输出到特定的日志文件中 log4j.logger.error=errorfile # error日志输出 log4j.appender.errorfile=org.apache.log4j.DailyRollingFileAppender log4j.appender.errorfile.file=/logsdata/logs/springboot-log4j-error.log log4j.appender.errorfile.DatePattern='.'yyyy-MM-dd log4j.appender.errorfile.Threshold = ERROR log4j.appender.errorfile.layout=org.apache.log4j.PatternLayout log4j.appender.errorfile.layout.ConversionPattern=%d{ yyyy-MM-dd HH:mm:ss,SSS} %5p %c{1}:%L - %m%n </td> 
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3：使用log4j

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 <td style="vertical-align:top;width:414.8pt;"> import java.util.List; &nbsp; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; &nbsp; import com.liujia.springdemo.entity.User; import com.liujia.springdemo.service.UserService; &nbsp; @RestController public class UserController { &nbsp; &nbsp;&nbsp;&nbsp;&nbsp; @Autowired &nbsp;&nbsp;&nbsp;&nbsp; private UserService userService; &nbsp;&nbsp;&nbsp;&nbsp; private Logger logger = LoggerFactory.getLogger(this.getClass()); &nbsp; &nbsp;&nbsp;&nbsp;&nbsp; @RequestMapping("/getallusers") &nbsp;&nbsp;&nbsp;&nbsp; public List&lt;User&gt; getAllUsers() { &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; logger.info("getallusers被调用了"); &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; return userService.getAll(); &nbsp;&nbsp;&nbsp;&nbsp; } } </td> 
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运行结果

![70][]

![70 1][]

日志详情截图

![70 2][]

![70 3][]

代码下载路径如下

[https://download.csdn.net/download/caoshangfeidie000/10670755][https_download.csdn.net_download_caoshangfeidie000_10670755]

[70]: /images/20220512/e022fdba30f242fcad6f486df67656e9.png
[70 1]: /images/20220512/480d65065b9e44c1a67b89945333e378.png
[70 2]: /images/20220512/23b87df76fe74fd0ab06a4d1928a3cb9.png
[70 3]: /images/20220512/8f862b6e06564b2fbf993377a7479522.png
[https_download.csdn.net_download_caoshangfeidie000_10670755]: https://download.csdn.net/download/caoshangfeidie000/10670755