我最初认为将maven-compiler-plugin
的源/目标设置为1.7就足以使编译失败,但是如果你安装了JDK 8,则编译会成功(奇怪!)。
你真正需要的是maven-enforcer-plugin
。请参见以下配置,我已将其放置在运行validate
阶段之前,也就是compile
之前:
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-enforcer-plugin</artifactId>
<version>3.0.0-M3</version>
<executions>
<execution>
<id>default-cli</id>
<phase>validate</phase>
<goals>
<goal>enforce</goal>
</goals>
<configuration>
<rules>
<requireJavaVersion>
<version>[1.7,1.8)</version>
</requireJavaVersion>
</rules>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
输出:
[INFO] --- maven-enforcer-plugin:3.0.0-M3:enforce (default-cli) @ compiler-demo ---
[WARNING] Rule 0: org.apache.maven.plugins.enforcer.RequireJavaVersion failed with message:
Detected JDK Version: 1.8.0-152 is not in the allowed range [1.7,1.8).
您甚至可以设置自定义消息,使同事们更清楚明白,例如:
<rules>
<requireJavaVersion>
<version>[1.7,1.8)</version> <message>Project requires JDK 7</message> </requireJavaVersion></rules>
输出:
[INFO] --- maven-enforcer-plugin:3.0.0-M3:enforce (default-cli) @ compiler-demo ---
[WARNING] Rule 0: org.apache.maven.plugins.enforcer.RequireJavaVersion failed with message:
Project requires JDK 7
为了探索插件的能力,我试图看看它是否支持多个版本范围。 它确实支持(在JDK 11上运行以尝试它):
<requireJavaVersion>
<version>[1.7,1.8),[9,10)</version>
</requireJavaVersion>
输出:
[INFO] --- maven-enforcer-plugin:3.0.0-M3:enforce (default-cli) @ compiler-demo ---
[WARNING] Rule 0: org.apache.maven.plugins.enforcer.RequireJavaVersion failed with message:
Detected JDK Version: 11.0.1 is not in the allowed range [1.7,1.8),[9,10).