Maven 换源 & Mybatis 开启 Log4j 日志框架

本文主要讲解如何在 idea 开发环境下更换 maven 国内镜像源与 Mybatis 开启 Log4j 日志框架相关操作

Maven 换源

国内镜像地址 : https://developer.aliyun.com/mvn/guide

在 maven 中找到 conf 然后配置 settings.xml 即可

不要在 idea 默认的 maven 插件目录下修改配置，否则下次更新会重新覆盖，失效！！！

其他不再赘述，请读者自行查询

这里主要叙述下 idea 开发环境中 针对 maven 的配置项，开始前首先区分两个设置

• 项目设置，只针对当前项目生效；
• 开发环境默认设置，每次建立项目都从这里读取相关配置；

由于我们在本地配置好了 maven 仓储库，并不想使用默认指定的位置（一般都在 c 盘符下），所以需要在 idea 中更新下

1.项目设置

进入设置，找到 maven

2.默认设置

如果你不想每次新建项目都需要重新配置，最好执行以下操作

Mybatis 开启 Log4j 日志框架

ration. Cause: org.apache.ibatis.logging.LogException: Error setting Log implementation. Cause: java.lang.NoClassDefFoundError: org/apache/log4j/Priority

网络现在大多的参考教程配置项仍为 log4j 1.2.17 版本，单此版本的安全漏洞在 idea 中禁用，若读者不能自行找到更高或最新版本，请参考以下教程

maven 中央仓库搜索 log4j 结果

发现已经迁移位置，来到新位置

可以看到已经针对漏洞进行了修复

点击合适版本并选择对应引入方式，（这里以 maven 为例）加入到 pom 文件下即可

pom.xml

<dependency>
    <groupId>org.apache.logging.log4jgroupId>
    <artifactId>log4j-coreartifactId>
    <version>2.19.0version>
dependency>
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log4j.properties

#声明日志的输出级别及输出方式
log4j.rootLogger=DEBUG,stdout
# MyBatis logging configuration...
# MyBatis 日志配置 (记得修改为你的项目对应文件)
log4j.logger.com.jason.jasonMapper=TRACE
# Console output...
#声明日志的输出位置在控制台输出
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
#定义日志的打印格式  %t 表示线程名称  %5p表示输出日志级别   %n表示换行
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n
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mybatis-config.xml

<settings>
    
    <setting name="logImpl" value="LOG4J"/>
settings>
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重新启动测试，成功

"C:\Program Files\Java\jdk-17.0.2\bin\java.exe" -ea -Didea.test.cyclic.buffer.size=1048576 "-javaagent:C:\IDE\IntelliJ IDEA 2021.2\lib\idea_rt.jar=1831:C:\IDE\IntelliJ IDEA 2021.2\bin" -Dfile.encoding=UTF-8 -classpath "C:\IDE\IntelliJ IDEA 2021.2\lib\idea_rt.jar;C:\IDE\IntelliJ IDEA 2021.2\plugins\junit\lib\junit5-rt.jar;C:\IDE\IntelliJ IDEA 2021.2\plugins\junit\lib\junit-rt.jar;D:\ProgrammeDisk\java-workspace\Mybatis\target\classes;D:\SoftwareDownloading\Maven\mvn_repo\org\mybatis\mybatis\3.5.10\mybatis-3.5.10.jar;D:\SoftwareDownloading\Maven\mvn_repo\mysql\mysql-connector-java\8.0.30\mysql-connector-java-8.0.30.jar;D:\SoftwareDownloading\Maven\mvn_repo\com\google\protobuf\protobuf-java\3.19.4\protobuf-java-3.19.4.jar;D:\SoftwareDownloading\Maven\mvn_repo\junit\junit\4.13.2\junit-4.13.2.jar;D:\SoftwareDownloading\Maven\mvn_repo\org\hamcrest\hamcrest-core\1.3\hamcrest-core-1.3.jar;D:\SoftwareDownloading\Maven\mvn_repo\org\apache\logging\log4j\log4j-core\2.19.0\log4j-core-2.19.0.jar;D:\SoftwareDownloading\Maven\mvn_repo\org\apache\logging\log4j\log4j-api\2.19.0\log4j-api-2.19.0.jar;D:\SoftwareDownloading\Maven\mvn_repo\log4j\log4j\1.2.17\log4j-1.2.17.jar" com.intellij.rt.junit.JUnitStarter -ideVersion5 -junit4 com.jason.test.UserTest
DEBUG [main] - Logging initialized using 'class org.apache.ibatis.logging.log4j.Log4jImpl' adapter.
DEBUG [main] - Class not found: org.jboss.vfs.VFS
DEBUG [main] - JBoss 6 VFS API is not available in this environment.
DEBUG [main] - Class not found: org.jboss.vfs.VirtualFile
DEBUG [main] - VFS implementation org.apache.ibatis.io.JBoss6VFS is not valid in this environment.
DEBUG [main] - Using VFS adapter org.apache.ibatis.io.DefaultVFS
DEBUG [main] - Find JAR URL: file:/D:/ProgrammeDisk/java-workspace/Mybatis/target/classes/com/jason/pojo
DEBUG [main] - Not a JAR: file:/D:/ProgrammeDisk/java-workspace/Mybatis/target/classes/com/jason/pojo
DEBUG [main] - Reader entry: User.class
DEBUG [main] - Listing file:/D:/ProgrammeDisk/java-workspace/Mybatis/target/classes/com/jason/pojo
DEBUG [main] - Find JAR URL: file:/D:/ProgrammeDisk/java-workspace/Mybatis/target/classes/com/jason/pojo/User.class
DEBUG [main] - Not a JAR: file:/D:/ProgrammeDisk/java-workspace/Mybatis/target/classes/com/jason/pojo/User.class
DEBUG [main] - Reader entry: x   = H
DEBUG [main] - Checking to see if class com.jason.pojo.User matches criteria [is assignable to Object]
DEBUG [main] - PooledDataSource forcefully closed/removed all connections.
DEBUG [main] - PooledDataSource forcefully closed/removed all connections.
DEBUG [main] - PooledDataSource forcefully closed/removed all connections.
DEBUG [main] - PooledDataSource forcefully closed/removed all connections.
DEBUG [main] - Opening JDBC Connection
DEBUG [main] - Created connection 1198817209.
DEBUG [main] - Setting autocommit to false on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@47747fb9]
DEBUG [main] - ==>  Preparing: insert into tb_user(name,sex,age,phone) values (?,?,?,?,?)
DEBUG [main] - ==> Parameters: ooo(String), ooo(String), ooo(String), ooo(String), ooo(String)
DEBUG [main] - <==    Updates: 1
成功插入 1 条数据
DEBUG [main] - Committing JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@47747fb9]
DEBUG [main] - Resetting autocommit to true on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@47747fb9]
DEBUG [main] - Closing JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@47747fb9]
DEBUG [main] - Returned connection 1198817209 to pool.
DEBUG [Finalizer] - PooledDataSource forcefully closed/removed all connections.
DEBUG [main] - Logging initialized using 'class org.apache.ibatis.logging.log4j.Log4jImpl' adapter.
DEBUG [main] - Find JAR URL: file:/D:/ProgrammeDisk/java-workspace/Mybatis/target/classes/com/jason/pojo
DEBUG [main] - Not a JAR: file:/D:/ProgrammeDisk/java-workspace/Mybatis/target/classes/com/jason/pojo
DEBUG [main] - Reader entry: User.class
DEBUG [main] - Listing file:/D:/ProgrammeDisk/java-workspace/Mybatis/target/classes/com/jason/pojo
DEBUG [main] - Find JAR URL: file:/D:/ProgrammeDisk/java-workspace/Mybatis/target/classes/com/jason/pojo/User.class
DEBUG [main] - Not a JAR: file:/D:/ProgrammeDisk/java-workspace/Mybatis/target/classes/com/jason/pojo/User.class
DEBUG [main] - Reader entry: x   = H
DEBUG [main] - Checking to see if class com.jason.pojo.User matches criteria [is assignable to Object]
DEBUG [main] - PooledDataSource forcefully closed/removed all connections.
DEBUG [main] - PooledDataSource forcefully closed/removed all connections.
DEBUG [main] - PooledDataSource forcefully closed/removed all connections.
DEBUG [main] - PooledDataSource forcefully closed/removed all connections.
DEBUG [main] - Opening JDBC Connection
DEBUG [main] - Created connection 470132045.
DEBUG [main] - Setting autocommit to false on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@1c05a54d]
DEBUG [main] - ==>  Preparing:  select * from tb_user where id=?
DEBUG [main] - ==> Parameters: 41(Integer)
DEBUG [main] - <==      Total: 1
User{id=41, name='jason', sex='男', age='00', phone='12345678901'}
DEBUG [main] - Resetting autocommit to true on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@1c05a54d]
DEBUG [main] - Closing JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@1c05a54d]
DEBUG [main] - Returned connection 470132045 to pool.

Process finished with exit code 0
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参考资料：

• Log4j vulnerability - Is Log4j 1.2.17 vulnerable (was unable to find any JNDI code in source)?
• How to mitigate Apache Log4j Deserialization RCE (CVE-2019-17571)