maven 指定 jdk 版本编译

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  <build> 
    <plugins> 
        <plugin> 
            <groupId>org.apache.maven.plugins</groupId> 
            <artifactId>maven-compiler-plugin</artifactId> 
            <version>3.8.0</version> 
            <configuration> 
                <source>1.7</source> 
                <target>1.7</target> 
            </configuration> 
        </plugin> 
    </plugins> 
</build>