对我来说，工作是把包含插件的存储库放在pluginRepository标签下。的例子,

<pluginRepositories>
    <pluginRepository>
        <id>pcentral</id>
        <name>pcentral</name>
        <url>https://repo1.maven.org/maven2</url>
    </pluginRepository>
</pluginRepositories>

如果你已经尝试清除你的.m2文件夹，使用“Invalidate Caches”和“Restart”，仔细检查POM文件中的插件声明，那么:

1. 检查IntelliJ Maven配置

Ctrl + Shift +一个 输入“Maven设置” 勾选“使用插件注册表” 再次检查“Maven主路径”和“用户设置文件” 尝试获取额外的日志:将“输出级别”设置为“调试”，然后单击“应用”

2. 检查IntelliJ Java配置

Ctrl + Shift +一个 输入“进口” 仔细检查“JDK for importer”中使用的JDK

3.更新cacerts keystore文件

请确保您信任远程Maven存储库的TLS服务器证书。为此，将公共证书添加到/path/to/jdk/jre/lib/security/下的cacerts密钥存储库(例如使用https://keystore-explorer.org/) -默认密码为“changeit”

如果你不能编辑文件:

Ctrl + Shift +一个 输入“进口” 更新“导入器的虚拟机选项”-Djavax.net.ssl.trustStore=/path/to/cacerts -Djavax.net.ssl.trustStorePassword=changeit然后单击“应用”

解决了! !

这就是我解决问题的方法……

Tried one of the answers which include 'could solve it by enabling "use plugin registry" '. Did enable that but no luck. Tried again one of the answers in the thread which says 'If that does not work, Invalidate your caches (File > Invalidate caches) and restart.' Did that but again no luck. Tried These options .. Go to Settings --> Maven --> Importing and made sure the following was selected Import Maven projects automatically Create IDEA modules for aggregator projects Keep source... Exclude build dir... Use Maven output... Generated souces folders: "detect automatically" Phase to be...: "process-resources" Automatically download: "sources" & "documentation" Use Maven3 to import project VM options for importer: -Xmx512m But again no success. Now lets say I had 10 such plugins which didn't get resolve and among them the first was 'org.apache.maven.plugins:maven-site-plugin' I went to '.m2/repository/org/apache/maven/plugins/' and deleted the directory 'maven-site-plugin' and did a maven reimport again. Guess what, particular missing plugin got dowloaded. And I just followed similar steps for other missing plugins and all got resolved.

6月/ 2021:

不删除，不重新导入。

我所做的就是:

C:\Users\dell\.m2\repository\org\apache\maven\plugins

然后双击每个插件文件夹，并查看下载的版本。

然后我回到pom文件，根据下载的版本，我在<version>....中仔细修改了那些版本> < /版本标签。然后刷新。

这样，所有的红色标记都消失了，甚至那些黄色标记也消失了。

所有的清洁。

这是我完整的pom文件，以备进一步通知。该项目是JavaFx+Maven与阴影:

<?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>main.java.sample</groupId>
    <artifactId>ThreeColumnTable</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>11</maven.compiler.source>
        <maven.compiler.target>11</maven.compiler.target>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.openjfx</groupId>
            <artifactId>javafx-controls</artifactId>
            <version>15.0.1</version>
        </dependency>
        <dependency>
            <groupId>org.openjfx</groupId>
            <artifactId>javafx-fxml</artifactId>
            <version>15.0.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-install-plugin</artifactId>
            <version>2.4</version>
            <type>maven-plugin</type>
        </dependency>

        <dependency>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-deploy-plugin</artifactId>
            <version>2.7</version>
            <type>maven-plugin</type>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.0</version>
                <configuration>
                    <source>11</source>
                    <target>11</target>
                    <release>11</release>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-resources-plugin</artifactId>
                <version>2.6</version>
                <executions>
                    <execution>
                        <phase>test</phase>
                        <goals>
                            <goal>resources</goal>
                            <goal>testResources</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-project-info-reports-plugin</artifactId>
                <version>3.1.2</version>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-clean-plugin</artifactId>
                <version>3.1.0</version>
                <configuration>
                    <filesets>
                        <fileset>
                            <directory>src/main/generated-groovy-stubs</directory>
                        </fileset>
                    </filesets>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <version>2.4</version>
                <configuration>
                    <archive>
                        <manifest>
                            <mainClass>org.example.App</mainClass>
                            <manifestFile>src/main/resources/META-INF/MANIFEST.MF</manifestFile>
                        </manifest>
                    </archive>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.openjfx</groupId>
                <artifactId>javafx-maven-plugin</artifactId>
                <version>0.0.1</version>
                <configuration>
                    <mainClass>org.example.App</mainClass>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>3.2.4</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                        <configuration>
                            <shadedArtifactAttached>true</shadedArtifactAttached>
                            <shadedClassifierName>project-classifier</shadedClassifierName>
                            <transformers>
                                <transformer implementation=
                                                     "org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                                    <mainClass>org.example.Main</mainClass>
                                </transformer>
                            </transformers>

                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

删除本地Maven未知插件并重新导入所有Maven项目。这将解决这个问题。

你可以在View > Tool Windows > Maven下找到它:

如果你在Maven插件的项目下面有红色的涂鸦，试着点击“重新导入所有Maven项目”按钮(看起来像一个刷新符号)。