[英]Accessing Maven Pom Variables From Properties File
I am developing a custom maven plugin. 我正在开发一个自定义maven插件。 When I write: 我写的时候:
${project.version}
into my pom file I can get its value however is there a way if I write into a properties file: 进入我的pom文件我可以得到它的值但是如果我写入属性文件有一种方法:
project.version = ${project.version}
that will set the project.version value correctly, how can I implement it at my Java code? 这将正确设置project.version值,如何在我的Java代码中实现它?
PS: I don't use annotations at my Mojo and I don't want to use variables at my Java code because user should define as my variables as at a properties file and I can not change my core Java code in order to changed things. PS:我没有在我的Mojo上使用注释,我不想在我的Java代码中使用变量,因为用户应该在属性文件中定义我的变量,并且我无法更改我的核心Java代码以便更改内容。
您只需在<build>
添加<resources>
<build>
并打开过滤所需的任何内容即可使用Maven资源过滤 。
within your mojo if using annotations see http://maven.apache.org/plugin-tools/maven-plugin-plugin/examples/using-annotations.html use 如果使用注释,请在您的mojo中查看http://maven.apache.org/plugin-tools/maven-plugin-plugin/examples/using-annotations.html使用
@Component
protected MavenProject project;
with doclet 与doclet
/**
* The Maven project to act upon.
*
* @parameter expression="${project}"
* @required
*/
private MavenProject project;
then project.getVersion() project.getVersion()
You may read and save any property in your pom.xml
as i do in this function: 您可以像在此函数中一样读取并保存pom.xml
任何属性:
/**
* Save a property in a pom.xml
*
* @param propertyName Name of the property
* @param value New value for the property
*/
public static void saveProjectProperty(String propertyName, String value)
{
Model model = null;
FileReader reader = null;
MavenXpp3Reader mavenreader = new MavenXpp3Reader();
try
{
reader = new FileReader("pom.xml");
model = mavenreader.read(reader);
MavenProject project = new MavenProject(model);
while (project.getParent() != null)
{
project = project.getParent();
}
project.getProperties().put(propertyName, value);
try (FileWriter fileWriter = new FileWriter("pom.xml"))
{
project.writeModel(fileWriter);
}
}
catch (IOException ex)
{
LOG.severe("Error saving pom.xml");
}
catch (XmlPullParserException ex)
{
LOG.warning("Error reading pom.xml");
}
}
To be able to use the clases not native in the JVM you should add these dependencies: 为了能够使用JVM中不是本机的clases,您应该添加这些依赖项:
<dependency>
<groupId>org.apache.maven</groupId>
<artifactId>maven-model</artifactId>
<version>2.0</version>
</dependency>
<dependency>
<groupId>org.apache.maven</groupId>
<artifactId>maven-project</artifactId>
<version>2.0</version>
</dependency
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