Maven找不到依赖项

Question

通过尝试将 Androidx appcompact 库依赖项添加到我的 hello world java maven 项目来玩 maven。我已经通过依赖更新了我的项目 pom.xml：

<dependencies>

...

<dependency>

<groupId>androidx.appcompat</groupId>

<artifactId>appcompat</artifactId>

<version>1.1.0</version>

<scope>runtime</scope>

</dependency>

...

</dependencies>

和存储库：

<repositories>

<repository>

<id>google</id>

<url>https://maven.google.com/</url>

</repository>

</repositories>

我已经执行了mvn package 命令并得到了错误：

[ERROR] Failed to execute goal on project my-app: Could not resolve dependencies for project com.mycompany.app:my-app:jar:1.0-SNAPSHOT: Could not find artifact androidx.appcompat:appcompat:jar:1.1.0 in google (https://maven.google.com/)

我做错了什么？

根据maven仓库包应该有。

整个 POM.XML：

<?xml version="1.0" encoding="UTF-8"?>

<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>com.mycompany.app</groupId>
  <artifactId>my-app</artifactId>
  <version>1.0-SNAPSHOT</version>

  <name>my-app</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</maven.compiler.target>
    <maven.compiler.release>11</maven.compiler.release>
  </properties>

  <dependencies>
  <dependency>
    <groupId>androidx.appcompat</groupId>
    <artifactId>appcompat</artifactId>
    <version>1.1.0</version>
    <scope>runtime</scope>
</dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>
  </dependencies>
    <repositories>
        <repository>
           <id>google</id>
           <url>https://maven.google.com/</url>
        </repository>

    </repositories>
  <build>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.1.0</version>
        </plugin>
        <!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.8.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.22.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-jar-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
        <!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
        <plugin>
          <artifactId>maven-site-plugin</artifactId>
          <version>3.7.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-project-info-reports-plugin</artifactId>
          <version>3.0.0</version>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>
</project>

Answer 1

试试

mvn clean install -U 

这将强制更新您的依赖项，同时检查 pom 文件中的 mvn 语法，如果仍然无法正常工作，请分享您的完整 pom 文件