首先在idea中查看maven的编码方式

执行mvn -v命令 查看编码语言是GBK

C:\Users\13488>mvn -v
Apache Maven 3.6.3 (cecedd343002696d0abb50b32b541b8a6ba2883f)
Maven home: D:\maven\apache-maven-3.6.3\bin\..
Java version: 1.8.0_202, vendor: Oracle Corporation, runtime: D:\Java\jdk1.8.0_202\jre
Default locale: zh_CN, platform encoding: GBK
OS name: "windows 10", version: "10.0", arch: "amd64", family: "windows"

在系统环境变量中，添加变量（变量名：MAVEN_OPTS，变量值：-Dfile.encoding=UTF-8），如下图

重启idea之后之后重新查看maven的编码方式

C:\Users\13488>mvn -v
Apache Maven 3.6.3 (cecedd343002696d0abb50b32b541b8a6ba2883f)
Maven home: D:\maven\apache-maven-3.6.3\bin\..
Java version: 1.8.0_202, vendor: Oracle Corporation, runtime: D:\Java\jdk1.8.0_202\jre
Default locale: zh_CN, platform encoding: UTF-8
OS name: "windows 10", version: "10.0", arch: "amd64", family: "windows"