环境： 环境变量JAVA_HOME配置jdk1.8

idea配置支持lambda：

File -> Project Structure -> Modules ->  Language level, 选择: 8-Lambdas, type annotations etc.

File -> Project Structure -> Project  ->  Project language level, 选择: 8-Lambdas, type annotations etc.

pom文件中对编译器的配置：

ROOT

org.apache.maven.plugins

maven-surefire-plugin

true

org.apache.maven.plugins

maven-compiler-plugin

3.3

1.8

1.8

true

UTF-8

org.springframework.boot

spring-boot-maven-plugin