为什么 Maven 会警告我有关编码的问题？

java maven maven-archetype

2022-08-31 08:16:12

我的目标是从项目创建一个原型。

当我运行一个不涉及maven-原型-插件的目标时，我看不到任何警告：

[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ maven-archetype-base ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 1 resource
[INFO] 
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ maven-archetype-base ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 0 resource
[INFO]

另一方面，当我运行archetype：create-from-project时，我得到了几个：

[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ maven-archetype-base-archetype ---
[WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 10 resources
[INFO] 
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ maven-archetype-base-archetype ---
[WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 2 resources

我知道“标准”的方法是使用属性。为了解决这个问题，我尝试向pom添加更多属性，但都没有奏效。project.build.sourceEncoding

有什么想法吗？谢谢。

我有以下pom.xml：

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>my.group.id</groupId>
<artifactId>my-artifact</artifactId>
<version>0.0.1</version>
<packaging>maven-archetype</packaging>

<properties>

    <!-- Compiler properties -->
    <maven.compiler.target>1.7</maven.compiler.target>
    <maven.compiler.source>1.7</maven.compiler.source>
    <encoding>UTF-8</encoding>
    <project.build.sourceEncoding>${encoding}</project.build.sourceEncoding>
    <project.reporting.outputEncoding>${encoding}</project.reporting.outputEncoding>
    <project.resources.sourceEncoding>${encoding}</project.resources.sourceEncoding>
    <archetype.encoding>${encoding}</archetype.encoding>

    <!-- Maven plugins version -->
    <maven-archetype-plugin-version>2.2</maven-archetype-plugin-version>
    <maven-resources-plugin-version>2.6</maven-resources-plugin-version>

    <!-- Maven extentions version -->
    <maven-archetype-packaging-extension-version>2.2</maven-archetype-packaging-extension-version>
</properties>
<dependencies>
[...]
</dependencies>

<build>
    <extensions>
        <extension>
            <groupId>org.apache.maven.archetype</groupId>
            <artifactId>archetype-packaging</artifactId>
            <version>${maven-archetype-packaging-extension-version}</version>
        </extension>
    </extensions>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-resources-plugin</artifactId>
            <version>${maven-resources-plugin-version}</version>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-archetype-plugin</artifactId>
            <version>${maven-archetype-plugin-version}</version>
            <extensions>true</extensions>
        </plugin>

    </plugins>

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

答案 1

您尚未按如下方式设置编码默认属性：

<project>
  ...
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>
  ...
</project>

这种方法比为每个插件手动定义编码更好，因为所有插件都具有用于编码的默认值，例如maven-resources-plugin：

encoding:

The character encoding scheme to be applied when filtering resources.
Type: java.lang.String
Required: No
User Property: encoding
Default: ${project.build.sourceEncoding}

所以这意味着你只需要定义这个属性，插件就会自动使用这个编码。

答案 2

我很生气地看到，在上述条目之后，Maven一直在抱怨

然后我意识到它是故障安全插件，它需要自己的属性

所以它在这里

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
</properties>