[Maven] [에러] not supported in -1.5

아래처럼 추가해주면 됨.

<plugin>

<groupId>org.apache.maven.plugins</groupId>

<artifactId>maven-compiler-plugin</artifactId>

<version>2.4</version>

<configuration>

<source>1.8</source>

<target>1.8</target>

</configuration>

</plugin>