java - 停止maven安装

Question

我正在使用默认的 pom.xml 测试一个 Spring Boot 项目。

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.4.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>demo</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>   
</project>

当我尝试运行命令mvn clean install时，以下两个异常ProjectBuildingException和UnresolvableModelException出现如下

[INFO] Scanning for projects...
Downloading from central: https://repo.maven.apache.org/maven2/org/springframework/boot/spring-boot-starter-parent/2.2.4.RELEASE/spring-boot-starter-parent-2.2.4.RELEASE.pom
[ERROR] [ERROR] Some problems were encountered while processing the POMs:
[FATAL] Non-resolvable parent POM for com.example:demo:0.0.1-SNAPSHOT: Could not transfer artifact org.springframework.boot:spring-boot-starter-parent:pom:2.2.4.RELEASE from/to central (https://repo.maven.apache.org/maven2): Transfer failed for https://repo.maven.apache.org/maven2/org/springframework/boot/spring-boot-starter-parent/2.2.4.RELEASE/spring-boot-starter-parent-2.2.4.RELEASE.pom and 'parent.relativePath' points at no local POM @ line 5, column 10
 @
[ERROR] The build could not read 1 project -> [Help 1]
[ERROR]
[ERROR]   The project com.example:demo:0.0.1-SNAPSHOT (C:\Users\User\Desktop\demo\pom.xml) has 1 error
[ERROR]     Non-resolvable parent POM for com.example:demo:0.0.1-SNAPSHOT: Could not transfer artifact org.springframework.boot:spring-boot-starter-parent:pom:2.2.4.RELEASE from/to central (https://repo.maven.apache.org/maven2): Transfer failed for https://repo.maven.apache.org/maven2/org/springframework/boot/spring-boot-starter-parent/2.2.4.RELEASE/spring-boot-starter-parent-2.2.4.RELEASE.pom and 'parent.relativePath' points at no local POM @ line 5, column 10: Connect to repo.maven.apache.org:443 [repo.maven.apache.org/151.101.240.215] failed: Connection timed out: connect -> [Help 2]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/ProjectBuildingException
[ERROR] [Help 2] http://cwiki.apache.org/confluence/display/MAVEN/UnresolvableModelException

Answer 1

原始日志显示尝试连接到 https://repo.maven.apache.org/maven2时间到。这可能是暂时的网络问题。