无法在eclipse中打开新创建的Maven项目

I created a new maven project using the following maven command

我使用以下maven命令创建了一个新的maven项目

mvn archetype:generate -DgroupId=com.company.lib_name -DartifactId=lib_name -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false

When I open this newly created project in eclipse it gives the following error:

当我在eclipse中打开这个新创建的项目时,会出现以下错误:

Could not calculate build plan: Plugin org.apache.maven.plugins:maven-jar-  plugin:2.3.2 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-jar-plugin:jar:2.3.2
Plugin org.apache.maven.plugins:maven-jar-plugin:2.3.2 or one of its    dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-jar-plugin:jar:2.3.2: Hostname cannot be null

I tried th following:

我试过以下:

Deleted the .m2/repository and rebuilt the project

删除.m2 / repository并重建项目

Verified that the artifact exists in the maven repo

已验证该工件存在于maven仓库中

Maven user settings point to the correct settings.xml

Maven用户设置指向正确的settings.xml

Project compiles on the command line

项目在命令行上编译

Cleaned the project

清理了这个项目

Forced updates n the project

强制更新项目

Checked repo to see all the dependencies are downloaded

检查repo以查看所有依赖项已下载

Change eclipse to use the external maven instead of embeded Also I am using Kepler and Maven 3.

改变eclipse使用外部maven而不是embeded我也使用Kepler和Maven 3。

Any idea what 'hostname cannot be null' is pointing at?

知道什么'主机名不能为空'指的是什么?

THis is the pom content

这是pom的内容

  <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/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.company.lib</groupId>
  <artifactId>liby</artifactId>
   <packaging>jar</packaging>
  <version>1.0-SNAPSHOT</version>
 <name>lib</name>
  <url>http://maven.apache.org</url>
  <dependencies>
    <dependency>
     <groupId>junit</groupId>
     <artifactId>junit</artifactId>
     <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
     <dependency>
       <groupId>org.slf4j</groupId>
       <artifactId>jcl-over-slf4j</artifactId>
       <version>1.7.0</version>
       <scope>runtime</scope>
       </dependency>
       <dependency>
       <groupId>org.slf4j</groupId>
       <artifactId>slf4j-api</artifactId>
        <version>1.7.0</version>
        <scope>runtime</scope>
    </dependency>
   <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-log4j12</artifactId>
      <scope>runtime</scope>
   </dependency>
   <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>1.2.14</version>
   </dependency>
   </dependencies>
 </project>

And the settings.xml

和settings.xml

<settings>
<profiles>
    <profile>
        <id>Blah</id>
        <repositories>
            <repository>
                <id>inhouse</id>
                <url>http://mavenrepo/maven2_repositories/inhouse</url>
                <releases>
                    <enabled>true</enabled>
                </releases>
                <snapshots>
                    <enabled>true</enabled>
                </snapshots>
            </repository>
            <repository>
                <id>inhouse_snapshot</id>
                <url>http://mavenrepo/maven2_repositories/inhouse_snapshot</url>
                <releases>
                    <enabled>true</enabled>
                </releases>
                <snapshots>
                    <enabled>true</enabled>
                </snapshots>
            </repository>
        </repositories>
        <pluginRepositories>
            <pluginRepository>
                <id>inhouse</id>
                <url>http://mavenrepo/maven2_repositories/inhouse</url>
                <releases>
                    <enabled>true</enabled>
                </releases>
                <snapshots>
                    <enabled>true</enabled>
                </snapshots>
            </pluginRepository>
            <pluginRepository>
                <id>inhouse_snapshot</id>
                <url>http://mavenrepo/maven2_repositories/inhouse_snapshot</url>
                <releases>
                    <enabled>true</enabled>
                </releases>
                <snapshots>
                    <enabled>true</enabled>
                </snapshots>
            </pluginRepository>
        </pluginRepositories>
    </profile> 
</profiles>
<activeProfiles>
    <activeProfile>company_name</activeProfile>
</activeProfiles>

<mirrors>
    <mirror>
        <id>central-to-nexus</id> 
        <mirrorOf>*</mirrorOf>
        <url>http://mw_maven_repository_readonly/nexus/content/groups/cached</url>
    </mirror>
</mirrors>

3 个解决方案

#1

It seems that you have created the project from Maven Template but you did not make this project as an Eclipse project before import it in Eclipse.

您似乎已经从Maven模板创建了项目,但在Eclipse中导入之前您没有将此项目作为Eclipse项目。

So after create a new maven project using the maven command you should also execute the below command to make the project as an Eclipse project

因此,在使用maven命令创建新的maven项目之后,您还应该执行以下命令以将项目作为Eclipse项目

mvn eclipse:eclipse

It will generate all project files that are required by Eclipse IDE.

它将生成Eclipse IDE所需的所有项目文件。

I also prefer to execute "mvn clean install" before import the project in Eclipse.

我还喜欢在Eclipse中导入项目之前执行“mvn clean install”。

#2

At command prompt :

在命令提示符下:

mvn eclipse:eclipse
mvn clean install

mvn eclipse:eclipse mvn clean install

This should download all dependencies

这应该下载所有依赖项

#3

Thank you all for the answers. but the problem was with the maven repo url.

谢谢大家的答案。但问题出在maven repo网址上。

#1