java - eclipse中读取maven项目失败: For Input String "US"

Question

我在 Eclipse (Neon 2) 中有一个 Maven 项目。

该特定项目的 pom.xml 出现错误。每当我在 eclipse 中打开 pom 文件时，“错误日志”选项卡中都会抛出一条错误消息。消息是这样的 --> 无法读取 Maven 项目:对于输入字符串:“US”。

双击错误会显示完整的错误消息:

java.lang.NumberFormatException: For input string: "US"
    at java.lang.NumberFormatException.forInputString(Unknown Source)
    at java.lang.Integer.parseInt(Unknown Source)
    at org.apache.maven.artifact.repository.MavenArtifactRepository.decode(MavenArtifactRepository.java:314)
    at org.apache.maven.artifact.repository.MavenArtifactRepository.basedir(MavenArtifactRepository.java:246)
    at org.apache.maven.artifact.repository.MavenArtifactRepository.<init>(MavenArtifactRepository.java:80)
    at org.apache.maven.bridge.MavenRepositorySystem.createArtifactRepository(MavenRepositorySystem.java:467)
    at org.apache.maven.bridge.MavenRepositorySystem.buildArtifactRepository(MavenRepositorySystem.java:387)
    at org.apache.maven.project.DefaultProjectBuilder.initProject(DefaultProjectBuilder.java:863)
    at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:176)
    at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:119)
    at org.apache.maven.project.DefaultProjectBuilder.initProject(DefaultProjectBuilder.java:679)
    at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:176)
    at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:119)
    at org.eclipse.m2e.core.internal.embedder.MavenImpl.readMavenProject(MavenImpl.java:636)
    at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager$5.call(ProjectRegistryManager.java:816)
    at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager$5.call(ProjectRegistryManager.java:1)
    at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:176)
    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.project.registry.ProjectRegistryManager.execute(ProjectRegistryManager.java:967)
    at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.readProjectWithDependencies(ProjectRegistryManager.java:811)
    at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.create(ProjectRegistryManager.java:192)
    at org.eclipse.m2e.core.internal.project.registry.MavenProjectManager.create(MavenProjectManager.java:80)
    at org.eclipse.m2e.core.ui.internal.actions.SelectionUtil.getMavenProject(SelectionUtil.java:259)
    at org.eclipse.m2e.editor.pom.MavenPomEditor.readMavenProject(MavenPomEditor.java:732)
    at org.eclipse.m2e.editor.pom.MavenPomEditor$5.run(MavenPomEditor.java:1053)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)

我仍然能够执行 mvn clean/install 等...但是在项目中不断看到 pom 错误很烦人。我不想简单地改变 Maven 或 Eclipse 中的某些内容来隐藏错误，我想了解为什么会发生这种情况以及修复它的最佳方法是什么。

Answer 1

这里抛出错误:

at org.apache.maven.artifact.repository.MavenArtifactRepository.decode(MavenArtifactRepository.java:314)

查看 MavenArtifactRepository 的 source code ，我认为您在 pom.xml 或 settings.xml 中定义了一个存储库，其 URL 无效(使用 String 美国)。

• 查看您的 pom.xml 或父 pom；
• 查看 settings.xml(通常位于 ~/.m2 中，尽管您可能已覆盖其在 Eclipse 中的位置)；
• 也许它是在 Eclipse 中配置的某个存储库，您可以通过 Eclipse 配置文件对 Eclipse 工作区进行完整搜索。

MavenArtifactRepository的相关源代码(阅读javadoc注释):

/**
 * Create a remote download repository.
 * @param url the URL of the repository
*/
public MavenArtifactRepository(..., String url, ...) {
    ...
    this.basedir = basedir( url );
}


/**
 * Derive the path portion of the given URL.
 * @param url the repository URL
*/
private String basedir( String url ) {
    if ( protocol.equalsIgnoreCase( "file" ) ) {
        retValue = url.substring( protocol.length() + 1 );
        retValue = decode( retValue );
    ...
}

/**
 * Decodes the specified (portion of a) URL. <strong>Note:</strong> This decoder assumes that ISO-8859-1 is used to
 * convert URL-encoded bytes to characters.
 *
 * @param url The URL to decode, may be <code>null</code>.
 * @return The decoded URL or <code>null</code> if the input was <code>null</code>.
 */
private static String decode( String url )
{
    String decoded = url;
    if ( url != null )
    {
        int pos = -1;
        while ( ( pos = decoded.indexOf( '%', pos + 1 ) ) >= 0 )
        {
            if ( pos + 2 < decoded.length() )
            {
                String hexStr = decoded.substring( pos + 1, pos + 3 );
                char ch = (char) Integer.parseInt( hexStr, 16 );
                decoded = decoded.substring( 0, pos ) + ch + decoded.substring( pos + 3 );
            }
        }
    }
    return decoded;
}

<小时/>

如果我正确地阅读了代码，您的坏存储库可能如下所示:

file:anything%USanything

显然(根据代码)，只有有效的 2 位十六进制 应该跟在网址中的“%”符号之后...