在pom.xml中使用变量 [英] Using variables in pom.xml

问题描述

我想使用一个变量，该变量在属性文件中取决于环境. 我想在我的pom.xml中使用该变量.

I want to use a variable which has different values in the properties file depending on the environment. I want to use that variable in my pom.xml.

推荐答案

您正在寻找 Maven资源过滤

使用资源过滤时需要遵循3个步骤:

步骤1:

在pom中添加一组适当的<profile>条目，并将所需的变量包括在<properties>的列表中:

You are looking for Maven Resource Filtering

There are 3 steps to follow when using resource filtering:

Step 1:

Add a set of appropriate <profile> entries in your pom and include the variables you need in a list of <properties>:

<profile>
    <id>Dev</id>
    <properties>
        <proxyServer>dev.proxy.host</proxyServer>
        <proxyPort>1234</proxyPort>
    </properties>
</profile>
<profile>
    <id>QA</id>
    <properties>
        <proxyServer>QA.PROXY.NET</proxyServer>
        <proxyPort>8888</proxyPort>
    </properties>
</profile>
<profile>
    <id>Prod</id>
    <activation>
        <activeByDefault>true</activeByDefault>
    </activation>
    <properties>
        <proxyServer>PROD.PROXY.NET</proxyServer>
        <proxyPort>8080</proxyPort>
    </properties>
</profile>

请注意，Prod配置文件已标记为:<activeByDefault>.

Notice that the Prod profile has been tagged: <activeByDefault>.

在属性文件中，使用pom样式变量划分来添加变量值占位符，以匹配pom中使用的<property>标记名称:

Within the properties file, use pom-style variable demarcation to add variable value placeholders, matching the <property> tag names used in the pom:

proxyServer=${proxyServer}
proxyPort=${proxyPort}

步骤3:

在pom的<build>部分中，添加一个<resources>条目(假设您的属性位于 src/main/resources 目录中)，包括一个<filtering>标记，并设置值至:true:

Step 3:

Within the pom's <build> section, add a <resources> entry (assuming that your properties are in the src/main/resources directory), include a <filtering> tag, and set the value to: true:

<resources>
    <resource>
        <directory>src/main/resources</directory>
        <filtering>true</filtering>
        <includes>
            <include>settings.properties</include>
        </includes>
    </resource>
</resources>

然后，当您运行Maven构建时，标出的属性值将替换为pom <profile>条目中定义的值.

Then, when you run your Maven build, the demarcated property values will be replaced with the values that are defined in the pom <profile> entries.

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