idea error:java: 无效的源发行版: 8

1. 检查pom.xml

    <plugin>        <groupId>org.apache.maven.plugins</groupId>        <artifactId>maven-compiler-plugin</artifactId>        <configuration>            <source>1.8</source>            <target>1.8</target>            <encoding>utf8</encoding>        </configuration> </plugin>

   可以发现，pom.xml中要求的是jdk8，出错的原因就是idea中配置的jdk版本不是8

2. 安装jdk1.8，过程略

3. 修改idea中的配置：file–>project structure

4. file–>project structure
   

5. file–>settings

6. file–>settings

7. file–>settings