报错信息：Java compiler level does not match the version of the installed Java project facet

解决方法：

1.点击工具栏上的“Window” -》“Preferences”-》“Java”-》“Compiler”-》选择高版本jdk

2.右键项目-》“Properties”-》“Java Compiler”-》选择高版本jdk

3.右键项目-》“Properties”-》“Project facts”-》选择高版本jdk

转载：https://jingyan.baidu.com/article/95c9d20da3ec5fec4e756186.html

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