解决办法：

 <plugin>
      <groupId>org.apache.maven.plugins</groupId>
      <artifactId>maven-compiler-plugin</artifactId>
      <version>3.1</version>
      <configuration>
          <source>${java.version}</source>
          <target>${java.version}</target>
          <encoding>UTF-8</encoding>
          <compilerArguments>
              <bootclasspath>${java.home}/lib/rt.jar</bootclasspath>
          </compilerArguments>
      </configuration>
  </plugin>

如果已经配置了

<plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
</plugin>

将maven-compiler-plugin配置在后面，插件会覆盖springboot集成的插件