写spring helloController.clss ,@Controller 报错
IDEA下报错：annotations are not supported at this language level
解决：
1. File -> Project Structure -> Project -> Project Language Level 选择“8 Lamdas Type Annotations etc”
2. 如果没有改选项请先安装和配置JDK1.8
3. 如果为Maven项目，请将pom.xml中maven-compiler-plugin中<configuration>中的<source>和<target>配置为1.8
annotations are not supported at this language level解决办法
原文：http://www.cnblogs.com/pinganjiankang/p/6920423.html