[英]Access maven properties defined in the pom
如何在普通 maven 项目和 maven 插件项目中访问 pom 中定义的 maven 属性?
Use the properties-maven-plugin to write specific pom properties
to a file at compile time, and then read that file at run time. 使用properties-maven-plugin在编译时将特定的pom
properties
写入文件,然后在运行时读取该文件。
In your pom.xml : 在你的pom.xml中 :
<properties>
<name>${project.name}</name>
<version>${project.version}</version>
<foo>bar</foo>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>properties-maven-plugin</artifactId>
<version>1.0.0</version>
<executions>
<execution>
<phase>generate-resources</phase>
<goals>
<goal>write-project-properties</goal>
</goals>
<configuration>
<outputFile>${project.build.outputDirectory}/my.properties</outputFile>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
And then in .java : 然后在.java中 :
java.io.InputStream is = this.getClass().getResourceAsStream("my.properties");
java.util.Properties p = new Properties();
p.load(is);
String name = p.getProperty("name");
String version = p.getProperty("version");
String foo = p.getProperty("foo");
Maven already has a solution to do what you want: Maven已经有了解决方案来做你想做的事:
Get MavenProject from just the POM.xml - pom parser? 从POM.xml获取MavenProject - pom解析器?
btw: first hit at google search ;) 顺便说一下:第一次点击google搜索;)
Model model = null;
FileReader reader = null;
MavenXpp3Reader mavenreader = new MavenXpp3Reader();
try {
reader = new FileReader(pomfile); // <-- pomfile is your pom.xml
model = mavenreader.read(reader);
model.setPomFile(pomfile);
}catch(Exception ex){
// do something better here
ex.printStackTrace()
}
MavenProject project = new MavenProject(model);
project.getProperties() // <-- thats what you need
This can be done with standard java properties in combination with the maven-resource-plugin
with enabled filtering on properties. 这可以通过标准java属性与
maven-resource-plugin
结合使用,并启用属性过滤。
For more info see http://maven.apache.org/plugins/maven-resources-plugin/examples/filter.html 有关详细信息,请参阅http://maven.apache.org/plugins/maven-resources-plugin/examples/filter.html
This will work for standard maven project as for plugin projects 这将适用于标准maven项目和插件项目
Update for Leif Gruenwoldt answer : Leif Gruenwoldt答案的更新:
It's important to use使用很重要
this.getClass().getClassLoader().getResourceAsStream("maven.properties");
instead of just而不仅仅是
this.getClass().getResourceAsStream("maven.properties");
Especially, if you write your maven.properties
file right to project.build.outputDirectory
:特别是,如果您将
maven.properties
文件写入project.build.outputDirectory
:
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>properties-maven-plugin</artifactId>
<version>1.0.0</version>
<executions>
<execution>
<phase>generate-resources</phase>
<goals>
<goal>write-project-properties</goal>
</goals>
<configuration>
<outputFile>${project.build.outputDirectory}/maven.properties</outputFile>
</configuration>
</execution>
</executions>
</plugin>
I use the build-info goal in spring-boot-maven-plugin :我在spring-boot-maven-plugin 中使用build-info目标:
In my pom.xml:在我的 pom.xml 中:
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<executions>
...
<execution>
<id>build-info</id>
<goals>
<goal>build-info</goal>
</goals>
</execution>
</executions>
<configuration>
...
</configuration>
</plugin>
And in my code:在我的代码中:
@Autowired
BuildProperties buildProperties;
...
@GetMapping
public Map<String, String> getVersion() {
return Map.of(
"build.name", buildProperties.getName(),
"build.version", buildProperties.getVersion(),
"build.date", buildProperties.getTime().toString());
}
More information about this plugin goal can be found here: https://docs.spring.io/spring-boot/docs/current/maven-plugin/reference/htmlsingle/#goals-build-info关于这个插件目标的更多信息可以在这里找到: https : //docs.spring.io/spring-boot/docs/current/maven-plugin/reference/htmlsingle/#goals-build-info
您可以使用JDOM(http://www.jdom.org/)解析pom文件。
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