未与 -source 1.6 一起设置引导类路径

bootstrap class path not set in conjunction with -source 1.6

<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.2</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
<compilerArgument>-Xlint:all</compilerArgument>
<showWarnings>true</showWarnings>
<showDeprecation>true</showDeprecation>
<encoding>UTF-8</encoding>
</configuration>
</plugin>

把红色部分都设置成1.7