不可解析的导入POM未找到

Question

我在父pom中尝试像模块一样的弹簧启动，现在我得到了错误

[ERROR] [ERROR] Some problems were encountered while processing the POMs:
[ERROR] Non-resolvable import POM: Failure to find org.springframework.boot:spring-boot-dependencies:pom:2.0.0.M6 in 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 @ line 30, column 19
 @ 
[ERROR] The build could not read 1 project -> [Help 1]
[ERROR]   
[ERROR]   The project mydomain.project:main-project:1.0-SNAPSHOT (D:\gitProjects\main-server\sources\pom.xml) has 1 error
[ERROR]     Non-resolvable import POM: Failure to find org.springframework.boot:spring-boot-dependencies:pom:2.0.0.M6 in 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 @ line 30, column 19 -> [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

我尝试在.m2 local repo中删除myproject

我有2个模块的maven项目（简单的java和spring boot）。我将父启动从春季启动提取到主要pom，如dependensyManagment，并将paren设置为spring boot - 主项目。之后我得到了这个错误

我还原了变化，一切正常。所有粉碎时，我一步一步嘲笑点

1. 我把它添加到主pom

<dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-dependencies</artifactId>
        <version>2.0.0.M6</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
    </dependencies>   </dependencyManagement>

2. 在春季靴子我改变了这一点

<parent>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-parent</artifactId>
      <version>2.0.0.M6</version>
      <relativePath/> <!-- lookup parent from repository -->
  </parent>

对此：

<parent>
        <artifactId>main-project</artifactId>
        <groupId>main.project</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>

Answer 1

版本2.0.0.M6不在repo http://repo.maven.apache.org/maven2中。如果你不想使用这个版本，你必须使用maven repo http://repo.spring.io/milestone。所以将它添加到您的POM文件中：

<repositories>
    <repository>
        <id>spring-milestone-repo</id>
        <url>http://repo.spring.io/milestone/</url>
    </repository>
</repositories>

我建议你使用spring-boot（1.5.8.RELEASE）的最新版本，而不是里程碑版本。我不知道你的POM是怎样的，但是你可以用不同的方式在你的POM中定义spring boot：

1. Using the Spring Boot parent POM

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.8.RELEASE</version>
</parent>

然后你可以添加你想要使用的依赖项，例如：

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
</dependencies>

见：https://spring.io/guides/gs/spring-boot/

2. Declare Spring-Boot in Dependency-Management

如果您已经使用了自己的父POM，那么您还可以在POM中导入spring boot依赖关系管理：

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-dependencies</artifactId>
            <version>1.5.8.RELEASE</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

与变体＃1相同，您可以在之后声明要使用的spring boot的依赖项。