Eclipse 在 Maven 编译阶段抛出错误？

Question

项目无法执行 Maven 生命周期映射的两个生命周期阶段：

编译器：编译
编译器：测试编译

以下是 eclipse 中的错误：

CoreException: Could not calculate build plan: Plugin org.apache.maven.plugins:maven-compiler-plugin:2.5.1 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-compiler-plugin:jar:2.5.1: ArtifactResolutionException: Failure to transfer org.apache.maven.plugins:maven-compiler-plugin:pom:2.5.1 from http://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced. Original error: Could not transfer artifact org.apache.maven.plugins:maven-compiler-plugin:pom:2.5.1 from/to central (http://repo.maven.apache.org/maven2): repo.maven.apache.org
pom.xml /ex line 1 Maven Project Build Lifecycle Mapping Problem
Plugin execution not covered by lifecycle configuration: org.apache.maven.plugins:maven-compiler-plugin:2.5.1:compile (execution: default-compile, phase: compile) pom.xml
/ex line 1 Maven Project Build Lifecycle Mapping Problem
Plugin execution not covered by lifecycle configuration: org.apache.maven.plugins:maven-compiler-plugin:2.5.1:testCompile (execution: default-testCompile, phase: test-compile)
pom.xml /ex line 1 Maven Project Build Lifecycle Mapping Problem

Answer 1

在eclipse中转到windows->preferences->maven->user setting

将用户设置文本框指向 %M2_HOME%\conf

中的 setting.xml

Answer 2

if its not working still then you need to add plugins in the POM.xml and update project

<build>
    <plugins>
        <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.20</version>
                <configuration>
                     <suiteXmlFiles>
                            <suiteXmlFile>testng.xml</suiteXmlFile>
                     </suiteXmlFiles>
                </configuration>
             </plugin>
             <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.6.2</version>
            <configuration>
                <source>1.8</source>
                <target>1.8</target>
        </configuration>
        </plugin>
    </plugins>
</build>

Eclipse 在 Maven 编译阶段抛出错误？

Eclipse throwing errors for maven compile phase?

pom.xml