ERROR :Non-resolvable parent POM: Could not transfer artifact org.springframework.boot:spring-boot-starter-parent:pom

问题

I am getting the below exception in pom.xml when trying to run application, I saw some posts regarding the error, I followed them but no use, I understood the artifact(parent) is referred locally and is not present, but I don't know how to resolve this, could somebody please help me,

The error is

Project build error: Non-resolvable parent POM for com.example:demo:0.0.1-SNAPSHOT: Failure 
 to transfer org.springframework.boot:spring-boot-starter-parent:pom:1.5.18.BUILD-SNAPSHOT 
 from https://repo.spring.io/snapshot was cached in the local repository, resolution will not be 
 reattempted until the update interval of spring-snapshots has elapsed or updates are forced. 
 Original error: Could not transfer artifact org.springframework.boot:spring-boot-starter-
 parent:pom:1.5.18.BUILD-SNAPSHOT from/to spring-snapshots (https://repo.spring.io/
 snapshot): repo.spring.io and 'parent.relativePath' points at no local POM

below is the pom.xml

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.example</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>demo</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.18.BUILD-SNAPSHOT</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jersey</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

    <repositories>
        <repository>
            <id>spring-snapshots</id>
            <name>Spring Snapshots</name>
            <url>https://repo.spring.io/snapshot</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>

    <pluginRepositories>
        <pluginRepository>
            <id>spring-snapshots</id>
            <name>Spring Snapshots</name>
            <url>https://repo.spring.io/snapshot</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </pluginRepository>
        <pluginRepository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </pluginRepository>
    </pluginRepositories>


</project>

回答1:

pom.xml is fine, Looks like It's a problem with your internet connection. Check, if you can reach https://repo.spring.io/snapshot/ with your browser. If yes, check if you need to configure a proxy server. If no, you should contact your internet provider.

Here is the documentation, how you configure a proxy server for Maven: https://maven.apache.org/guides/mini/guide-proxies.html

回答2:

There is an issue with the version of Spring Boot you are using as it is a build. Just copy the another release version of 1.X and replace it.

<parent>  <groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>1.5.17.RELEASE</version><relativePath/> <!-- lookup parent from repository --></parent>

回答3:

if you can access the url https://repo.spring.io/snapshot/ from your browser, then it can be a maven issue, maven is unable to connect to the repository and that can be due to:

1)any cache issue in the downloaded dependencies,try out deleting the local dependencies, try out solution provided here.

2)try Maven Update and maven clean.

3)try re-opening the IDE after doing the above.

回答4:

1. Downgrade the spring boot starter to lower version.
2. Update the Maven project.

Hope it works.

来源：https://stackoverflow.com/questions/53187059/error-non-resolvable-parent-pom-could-not-transfer-artifact-org-springframewor