idea根据编译提示可以设置编译级别,但如果reimport后,级别又自动回到1.5,
通过将下述配置引入pom文件中,即可解决:
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
</configuration>
</plugin>
</plugins>
</build>
原文:https://www.cnblogs.com/wangxuejian/p/13709352.html