一、问题

升级java11后，maven命令打包报错：

mvn clean package -Dmaven.test.skip=true

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.1:compile (default-compile) on project ***: Fatal error compiling: invalid target release: 11 -> [Help 1]

二、排查过程

1.首先检查一下IDEA中如下设置，完成之后maven打包仍然报错。

2.检查java版本，运行命令java-version,发现在windows命令行和IDEA中结果不同。猜测跟系统环境变量有关。

3.设置环境变量指向jdk11安装目录，然后重启IDEA，maven命令打包成功。

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