maven默认过滤器目录的好处 [英] Benefits of maven default filters directory

问题描述

最近我发现了maven资源过滤，并在文档中看到了一个注释：

Recently I have discovered maven resource filtering and saw one note in documentation:

标准目录布局 < br>
src / main / filters资源过滤器文件

Standard Directory Layout
src/main/filters Resource filter files

我注意到maven没有搜索在<$中声明的文件默认情况下，此目录中的c $ c>< filter> 标记。那么在这种情况下坚持使用Maven布局有什么好处（除了结构均匀性）？

I have noticed that maven does not search files declared in <filter> tag in this directory by default. So what are the benefits of sticking with Maven Layout in this case (except structure uniformity ofcourse)?

推荐答案

基本上你假设 src / main / filters （或 src / test / filters ）中存在的文件本身是可过滤的。这个假设是不正确的。

Basically you're assuming that the files that are present in src/main/filters (or src/test/filters) are themselves filterable. That assumption isn't correct.

src / main / filters 文件夹的目的是包含将使用的资源过滤器文件在过滤操作期间由Maven提供。

The purpose of the src/main/filters folder is to contain the resource filter files that will be used by Maven during the filtering action.

例如，假设您已定义以下属性：

For instance, imagine that you have the following property defined:

<project>
...
<properties>
    <my.property>foo</my.property>
</properties>
...
</project>

现在想象你正在过滤一些文件夹：

And now imagine that you're filtering some folder:

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

使用该定义， src / main /中的任何文件包含 $ {my.property} 的资源将替换为 foo 。

现在想象一下每次要添加新属性时都不想更改POM。

Now imagine that you don't want to change your POM every time you want to add a new property.

然后是 src / main / filters 开始行动了。您可以使用属性在 src / main / filters 下创建一个文件，然后在POM中添加一个过滤器，而不是将您的属性放在POM中：

Then is when src/main/filters comes into action. Instead of placing your properties in your POM, you create a file under src/main/filters with your properties and you add a filter to your POM:

<project>
    ...
    <name>Some Project</name>
    ...
    <build>
        ...
        <filters>
            <filter>my-filter.properties</filter>
        </filters>
        ...
    </build>
    ...
</project>

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