log4j警告之log4j:WARN No appenders could be found for logger(org.apache.ibatis.logging.LogFactory).

ゞ浴缸里的玫瑰 2024-04-07 14:22 63阅读 0赞

## **1、看是否在pom.xml中加载依赖** ##

## **2、已经加载依赖时，就配置log4j的配置，可以配置log4j.xml和log4j.properties** ##

**注意：两个文件只要有其中一个就可以了**

log4j.xml的配置

<?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
    
    <log4j:configuration>
        <appender name="STDOUT" class="org.apache.log4j.ConsoleAppender">
            <param name="Encoding" value="UTF-8"/>
            <layout class="org.apache.log4j.PatternLayout">
                <param name="ConversionPattern" value="%-5p %d{MM-dd HH:mm:ss:SSS} %m (%F:%L) \n"/>
            </layout>
        </appender>
        <logger name="java.sql">
            <level value="debug"/>
        </logger>
        <logger name="org.apache.ibatis">
            <level value="info"/>
        </logger>
        <root>
            <level value="debug"/>
            <appender-ref ref="STDOUT"/>
        </root>
    </log4j:configuration>

log4j.properties的配置

log4j.rootLogger=DEBUG, stdout
    log4j.logger.org.mybatis.example.BlogMapper=TRACE
    log4j.appender.stdout=org.apache.log4j.ConsoleAppender
    log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
    log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n

至于配那个配置，任君选择

## 3、如果还是报错，就再加载一遍maven依赖 ##

弱弱的说一句：可能要注意log4j的版本兼容问题，有可能是版本过低导致

## 4、可以自己手动写一个初始化方法 ##

#### fileInputStream = new FileInputStream("src/main/resources/log4j.properties"); ####

是log4j的配置所在的位置，按照位置来写路径

![f42c7618a6134b4d9c199c14637c7607.png][]

最后调用初始化方法

![8edf429384734d7d90a0a02ea9a490ad.png][]

![34fdcbd218c94002b3b4d41bfa343266.png][]

![6727daf7fbae47a6a586b7c2b15f6724.png][]

谢谢各位大佬观看

[f42c7618a6134b4d9c199c14637c7607.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/07/5985c41575f3456fa0ec915177b31e70.png
[8edf429384734d7d90a0a02ea9a490ad.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/07/33e42d17f34e4f7aa456ed50260c5993.png
[34fdcbd218c94002b3b4d41bfa343266.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/07/34839f57b66948a28c39a7311270cc20.png
[6727daf7fbae47a6a586b7c2b15f6724.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/07/18223a00d1f74a7a90c04d7f9a418288.png