Maven的pom文件错误

以下错误是因为Maven的本地包索引错误引起的。
直接删除 Maven本地包目录下面的org.springframework.boot下面的包（可以整个boot删除，以后重新下载），然后项目——右键Maven——update maven project即可。
Description	Resource	Path	Location	Type
Failed to read artifact descriptor for org.springframework.boot:spring-boot-starter-test:jar:2.1.0.RELEASE

org.eclipse.aether.resolution.ArtifactDescriptorException: Failed to read artifact descriptor for org.springframework.boot:spring-boot-starter-test:jar:2.1.0.RELEASE
	at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.loadPom(DefaultArtifactDescriptorReader.java:276)
	at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.readArtifactDescriptor(DefaultArtifactDescriptorReader.java:192)
	at org.eclipse.aether.internal.impl.DefaultDependencyCollector.resolveCachedArtifactDescriptor(DefaultDependencyCollector.java:539)
	at org.eclipse.aether.internal.impl.DefaultDependencyCollector.getArtifactDescriptorResult(DefaultDependencyCollector.java:522)
	at org.eclipse.aether.internal.impl.DefaultDependencyCollector.processDependency(DefaultDependencyCollector.java:411)
	at org.eclipse.aether.internal.impl.DefaultDependencyCollector.processDependency(DefaultDependencyCollector.java:365)
	at org.eclipse.aether.internal.impl.DefaultDependencyCollector.process(DefaultDependencyCollector.java:353)
	at org.eclipse.aether.internal.impl.DefaultDependencyCollector.collectDependencies(DefaultDependencyCollector.java:256)
	at org.eclipse.aether.internal.impl.DefaultRepositorySystem.collectDependencies(DefaultRepositorySystem.java:282)
	at org.apache.maven.project.DefaultProjectDependenciesResolver.resolve(DefaultProjectDependenciesResolver.java:169)
	at org.apache.maven.project.DefaultProjectBuilder.resolveDependencies(DefaultProjectBuilder.java:212)
	at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:185)
	at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:116)
	at org.eclipse.m2e.core.internal.embedder.MavenImpl.readMavenProject(MavenImpl.java:636)
	at org.eclipse.m2e.core.internal.project.registry.DefaultMavenDependencyResolver.resolveProjectDependencies(DefaultMavenDependencyResolver.java:63)
	at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refreshPhase2(ProjectRegistryManager.java:530)
	at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager$3.call(ProjectRegistryManager.java:492)
	at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager$3.call(ProjectRegistryManager.java:1)
	at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:177)
	at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:151)
	at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:496)
	at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:351)
	at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:298)
	at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.updateProjectConfiguration0(ProjectConfigurationManager.java:405)
	at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager$2.call(ProjectConfigurationManager.java:352)
	at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager$2.call(ProjectConfigurationManager.java:1)
	at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:177)
	at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:151)
	at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:99)
	at org.eclipse.m2e.core.internal.embedder.MavenImpl.execute(MavenImpl.java:1351)
	at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.updateProjectConfiguration(ProjectConfigurationManager.java:349)
	at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.updateProjectConfiguration(ProjectConfigurationManager.java:335)
	at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.updateProjectConfiguration(ProjectConfigurationManager.java:317)
	at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.updateProjectConfiguration(ProjectConfigurationManager.java:306)
	at org.springframework.ide.eclipse.boot.wizard.importing.MavenStrategy.createEclipseProjectFromExistingMavenProject(MavenStrategy.java:138)
	at org.springframework.ide.eclipse.boot.wizard.importing.MavenStrategy$MavenCodeSetImport.run(MavenStrategy.java:84)
	at org.springframework.ide.eclipse.boot.wizard.NewSpringBootWizardModel.importProject(NewSpringBootWizardModel.java:351)
	at org.springframework.ide.eclipse.boot.wizard.NewSpringBootWizardModel.performFinish(NewSpringBootWizardModel.java:330)
	at org.springframework.ide.eclipse.boot.wizard.NewSpringBootWizard$1.run(NewSpringBootWizard.java:227)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
Caused by: org.eclipse.aether.resolution.ArtifactResolutionException: Failure to transfer org.springframework.boot:spring-boot-starter-test:pom:2.1.0.RELEASE from http://maven.aliyun.com/nexus/content/groups/public/ was cached in the local repository, resolution will not be reattempted until the update interval of alimaven has elapsed or updates are forced. Original error: Could not transfer artifact org.springframework.boot:spring-boot-starter-test:pom:2.1.0.RELEASE from/to alimaven (http://maven.aliyun.com/nexus/content/groups/public/): The operation was cancelled.
	at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:422)
	at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifacts(DefaultArtifactResolver.java:224)
	at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifact(DefaultArtifactResolver.java:201)
	at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.loadPom(DefaultArtifactDescriptorReader.java:261)
	... 39 more
Caused by: org.eclipse.aether.transfer.ArtifactTransferException: Failure to transfer org.springframework.boot:spring-boot-starter-test:pom:2.1.0.RELEASE from http://maven.aliyun.com/nexus/content/groups/public/ was cached in the local repository, resolution will not be reattempted until the update interval of alimaven has elapsed or updates are forced. Original error: Could not transfer artifact org.springframework.boot:spring-boot-starter-test:pom:2.1.0.RELEASE from/to alimaven (http://maven.aliyun.com/nexus/content/groups/public/): The operation was cancelled.
	at org.eclipse.aether.internal.impl.DefaultUpdateCheckManager.newException(DefaultUpdateCheckManager.java:240)
	at org.eclipse.aether.internal.impl.DefaultUpdateCheckManager.checkArtifact(DefaultUpdateCheckManager.java:208)
	at org.eclipse.aether.internal.impl.DefaultArtifactResolver.gatherDownloads(DefaultArtifactResolver.java:563)
	at org.eclipse.aether.internal.impl.DefaultArtifactResolver.performDownloads(DefaultArtifactResolver.java:481)
	at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:399)
	... 42 more
	pom.xml	/demo	line 1	Maven Dependency Problem
原文链接：https://blog.csdn.net/zhi_ai_yaya/article/details/83858639