有没有办法在编译期间在 Java 类中使用 maven 属性 [英] Is there a way to use maven property in Java class during compilation

问题描述

我只想在编译时在我的 Java 类中使用 maven 占位符以减少重复.

I just want to use maven placeholder in my Java class at compile time in order to reduce duplication.

类似的东西:

pom.xml

<properties>
  <some.version>1.0</some.version>
</properties>

SomeVersion.java

package some.company;

public class SomeVersion {

    public static String getVersion() {
        return "${some.version}"
    }

}

推荐答案

只需在 src/main/resources 中创建文件 app.properties，内容如下

simply create file app.properties in src/main/resources with content like this

application.version=${project.version}

然后像这样启用maven过滤

then enable maven filtering like this

<build>
    <resources>
        <resource>
            <directory>src/main/resources</directory>
            <filtering>true</filtering>
        </resource>
    </resources>

仅此而已 - 在应用程序代码中只需读取属性文件

That's all - in app code just read properties file

ClassPathResource resource = new ClassPathResource( "app.properties" );
p = new Properties();
InputStream inputStream = null;
try {
    inputStream = resource.getInputStream();
    p.load( inputStream );
} catch ( IOException e ) {
    LOGGER.error( e.getMessage(), e );
} finally {
    Closeables.closeQuietly( inputStream );
}

并提供这样的方法

public static String projectVersion() {
    return p.getProperty( "application.version" );
}

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