指定Maven项目的系统属性 [英] Specify system property to Maven project

问题描述

是否有一种方法(我是说我该如何设置)在maven项目中?

Is there a way ( I mean how do I ) set a system property in a maven project?

我想从我的测试和我的webapp(在本地运行)中访问一个属性，并且我知道我可以使用java系统属性.

I want to access a property from my test and my webapp ( running locally ) and I know I can use a java system property.

我应该将其放在./settings.xml或类似的文件中吗?

Should I put that in ./settings.xml or something like that?

上下文

我参加了一个开源项目，并设法将数据库配置更改为使用JavaDB

I took an open source project and managed to change the db configuration to use JavaDB

现在，在JavaDB的jdbc URL中，可以将数据库的位置指定为完整路径(请参阅:

Now, in the jdbc url for JavaDB, the location of the database could be specified as the full path ( see: this other question )

或系统属性:derby.system.home

我的代码已经在工作，但是目前所有代码都被硬编码为:

I have the code working already, but currently it is all hardcoded to:

 jdbc:derby:/Users/oscarreyes/javadbs/mydb

我想删除完整路径，使其保留为:

And I want to remove the full path, to leave it like:

 jdbc:derby:mydb

为此，我需要指定系统属性(derby.system.home)进行Maven操作，但是我不知道如何操作.

To do that I need to specify the system property ( derby.system.home ) to maven, but I don't know how.

该测试是使用junit进行的(我在pom.xml中看不到任何插件)，并且该Web应用程序使用jetty插件运行.

The test are performed using junit ( I don't see any plugin in pom.xml ) and the web app runs with the jetty plugin.

在命令行中指定system属性似乎可以解决码头问题，但是我不确定这是否可行(允许其他用户通过eclipse/idea/来运行它)

Specifying the system property in the command line seems to work for jetty, but I'm not sure if that's something practical ( granted some other users may run it from eclipse/idea/ whatever )

推荐答案

是否有一种方法(我的意思是我)在Maven项目中设置系统属性?我想从测试中访问属性[...]

Is there a way ( I mean how do I ) set a system property in a maven project? I want to access a property from my test [...]

您可以在 Maven Surefire插件配置中设置系统属性(此很有意义，因为默认情况下测试是分叉的).来自使用系统属性:

You can set system properties in the Maven Surefire Plugin configuration (this makes sense since tests are forked by default). From Using System Properties:

<project>
  [...]
  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-surefire-plugin</artifactId>
        <version>2.5</version>
        <configuration>
          <systemPropertyVariables>
            <propertyName>propertyValue</propertyName>
            <buildDirectory>${project.build.directory}</buildDirectory>
            [...]
          </systemPropertyVariables>
        </configuration>
      </plugin>
    </plugins>
  </build>
  [...]
</project>

和我的网络应用程序(在本地运行)

and my webapp ( running locally )

不知道您的意思是什么，但是我假设webapp容器是由Maven启动的.您可以使用以下命令在命令行上传递系统属性:

Not sure what you mean here but I'll assume the webapp container is started by Maven. You can pass system properties on the command line using:

mvn -DargLine="-DpropertyName=propertyValue"

更新:好的，现在就知道了.对于Jetty，您还应该能够在Maven Jetty插件配置中设置系统属性.来自设置系统属性:

Update: Ok, got it now. For Jetty, you should also be able to set system properties in the Maven Jetty Plugin configuration. From Setting System Properties:

<project>
  ...
  <plugins>
    ...
      <plugin>
        <groupId>org.mortbay.jetty</groupId>
        <artifactId>maven-jetty-plugin</artifactId>
        <configuration>
         ...
         <systemProperties>
            <systemProperty>
              <name>propertyName</name>
              <value>propertyValue</value>
            </systemProperty>
            ...
         </systemProperties>
        </configuration>
      </plugin>
  </plugins>
</project>

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