idea编译-java版本的问题-！ 源发行版 1.7 需要目标发行版 1.7

Information:java: javacTask: 源发行版 1.7 需要目标发行版 1.7
Information:java: Errors occurred while compiling module ‘AdvanceGreen’
Information:javac 7 was used to compile java sources
Information:2019/1/8 19:41 - Compilation completed with 1 error and 0 warnings in 1s 172ms
所以如果是Maven项目，在pom.xml中指定java版本最好。
https://blog.csdn.net/V_ashon/article/details/80996132

<plugins>
    <plugin>
        <groupId>org.apache.maven.pluginsgroupId>
        <artifactId>maven-compiler-pluginartifactId>
        <version>3.7.0version>
        <configuration>
            <source>1.8source>
            <target>1.8target>
        configuration>
    plugin>
plugins>