一：idea language level 总是变成springboot 默认5时，
打包错误：-source 1.5 中不支持 diamond 运算符
plugin添加指定版本配置，如下
二：idea maven 打包报如下错误
Caused by: org.yaml.snakeyaml.scanner.ScannerException: while scanning for the next token
found character '@' that cannot start any token. (Do not use @ for indentation)
in 'reader', line 7, column 13:
active: @activatedProperties@
plugin添加配置，如下 注：当打包不报如上错误，启动项目主类时同样报此错，添加以下依赖
<dependency>
<groupId>org.yaml</groupId>
<artifactId>snakeyaml</artifactId>
<version>your-version</version>
</dependency>
**
END 完整配置：
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
</resource>
</resources>
</build>
