我的情况:

maven-javadoc-plugin with version 3.2.0 is displayed red in IntelliJ. Plugin is present in my local maven repo. Re-imported maven million times. Ran mvn clean install from the command line N times. All my maven settings in IntelliJ are correct. Tried to switch between Bundled and non-bundled Maven. Tried do delete the whole maven repo and to delete only the plugin from it. Nothing of the above worked. The only thing that almost always helps with modern IntelliJ IDEA versions is "Invalidate caches / Restart". It helped this time as well. maven-javadoc-plugin is not red anymore, and I can click on it and to to the source pom file of the plugin.

多年来，我在使用maven-deploy插件时遇到了这个问题，即使我没有直接将插件包含在POM中，这个错误也出现了。作为一种解决方法，我不得不强制将带有一个版本的插件包含到我的POMs插件部分中，只是为了删除红色曲线。

在尝试了Stack Overflow上的每个解决方案后，我发现了问题:在我的.m2/repository/org/apache/maven/plugins/maven-deploy-plugin目录中，有一个版本是“X.Y”和“2.8.2”等。所以我删除了整个Maven -deploy-plugin目录，然后重新导入我的Maven项目。

因此，问题似乎是解析存储库时的IntelliJ错误。不过，我不会删除整个存储库，只删除报告错误的插件。

以下是我试图解决这个问题的方法，它奏效了:

从.m2 repo中手动删除现有插件 在IntelliJ中启用“使用插件注册表” 使缓存无效并重新启动IntelliJ 在IntelliJ中重新导入maven项目

在执行上述步骤后，问题得到了修复。希望这对你也有帮助。

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>

我也有同样的问题。我将插件添加到pom.xml依赖项中，它为我工作。

    <dependency>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-site-plugin</artifactId>
        <version>3.3</version>
        <type>maven-plugin</type>
    </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>

取消选中Maven设置中的“脱机工作”复选框。