将Maven project导入Eclipse时出错

Question

当我将从开源网站（如Apache,Github）下载的现有Maven项目导入Eclipse时，发生了几个错误:(.注意，所有Maven项目都可以在Eclipse下正确编译和测试。

• 首先，在将maven项目导入到Eclipse之后，项目图标上将出现红色X，但是项目中没有错误。我发现在pom.xml文件中存在parent节点。我删除了节点，然后错误就消失了，我想知道为什么，因为maven项目中没有模块。下面的代码是我之前删除的节点。

<parent>
    <groupId> org.apache.commons </groupId>
    <artifactId> commons-parent </artifactId>
    <version> 38</version>
  </parent>

Failure to transfer xerces:xmlParserAPIs:jar:2.6.2 from https://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 xerces:xmlParserAPIs:jar:2.6.2 from/to central (https://repo.maven.apache.org/maven2): The operation was cancelled.

org.eclipse.aether.transfer.ArtifactTransferException: Failure to transfer xerces:xmlParserAPIs:jar:2.6.2 from https://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 xerces:xmlParserAPIs:jar:2.6.2 from/to central (https://repo.maven.apache.org/maven2): The operation was cancelled.
    at org.eclipse.aether.internal.impl.DefaultUpdateCheckManager.newException(DefaultUpdateCheckManager.java:238)
    at org.eclipse.aether.internal.impl.DefaultUpdateCheckManager.checkArtifact(DefaultUpdateCheckManager.java:206)

Answer 1

以下错误org.eclipse.aether.transfer.ArtifactTransferException：从https://repo.maven.apache.org/maven2传输Xerces:xmlparserapis:jar:2.6.2已缓存在本地存储库中，在经过central的更新间隔或强制更新之前，不会重新尝试解决。原始错误：无法将工件Xerces:XMLParserAPIS:JAR:2.6.2从/传输到central(https://repo.maven.apache.org/maven2):取消的操作将在步骤2中得到修复。

请尝试此操作，如果1不起作用，请尝试2：

1）首先更新项目，Alt-F5

3）如果失败，请从命令行尝试mvn clean install-u。