设置Maven项目时出错

Question

第一次我在Eclipse Luna上设置Maven项目，并且在pom.xml文件上遇到了以下错误。 我做了很多谷歌来解决这个问题，但无法解决错误。

错误：

未能从https://repo.maven.apache.org/maven2传输org.apache.maven：maven-archiver：pom：2.6到本地存储库中缓存，直到中心的更新间隔过去，解析才会重新尝试或强制更新。 原始错误：无法从/到中央（（ https://repo.maven.apache.org/maven2 ）传输工件org.apache.maven：maven-archiver：pom：2.6：repo.maven.apache.org

http://maven.apache.org/xsd/maven-4.0.0.xsd“> 4.0.0 vpp-plant-config-design vpp-plant-config-design 0.0.1-SNAPSHOT VPP Plant Config Design org.springframework .boot spring-boot-starter-parent 1.4.0.RELEASE

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <java.version>1.7</java.version>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.postgresql</groupId>
        <artifactId>postgresql</artifactId>
        <version>9.3-1100-jdbc41</version>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.27</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-jdbc</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-jersey</artifactId>
    </dependency>
    <dependency>
        <groupId>org.apache.commons</groupId>
        <artifactId>commons-lang3</artifactId>
        <version>3.5</version>
    </dependency>
    <dependency>
        <groupId>org.apache.poi</groupId>
        <artifactId>poi</artifactId>
        <version>3.10-FINAL</version>
    </dependency>
    <dependency>
        <groupId>org.apache.poi</groupId>
        <artifactId>poi-ooxml</artifactId>
        <version>3.9</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.json/json -->
    <dependency>
        <groupId>com.google.code.gson</groupId>
        <artifactId>gson</artifactId>
        </dependency>

    <!-- <dependency> <groupId>ojdbc</groupId> <artifactId>ojdbc</artifactId> <version>14</version> </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-data-jpa</artifactId>
    </dependency>
    <dependency>
        <groupId>commons-dbcp</groupId>
        <artifactId>commons-dbcp</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.security.oauth</groupId>
        <artifactId>spring-security-oauth2</artifactId>
    </dependency>
           <dependency>
        <groupId>commons-collections</groupId>
        <artifactId>commons-collections</artifactId>
    </dependency>
            <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>         
    </dependency>
    <dependency>
       <groupId>jfree</groupId>
       <artifactId>jcommon</artifactId>
       <version>1.0.0</version>
    </dependency>
   <dependency>
      <groupId>org.hibernate</groupId>
      <artifactId>hibernate-core</artifactId>
      <version>5.1.0.Final</version>
      <scope>provided</scope>
   </dependency>
   <dependency>
     <groupId>org.hibernate</groupId>
     <artifactId>hibernate-validator</artifactId>
     <version>5.2.4.Final</version>
     <scope>provided</scope>
   </dependency>
   <dependency>
     <groupId>org.hibernate</groupId>
     <artifactId>hibernate-entitymanager</artifactId>
     <version>5.1.0.Final</version>
   </dependency>
   <dependency>
     <groupId>net.sf.dozer</groupId>
     <artifactId>dozer</artifactId>
     <version>5.5.1</version>
   </dependency>

</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <configuration>
                <excludes>
                    <exclude>
                        <groupId>org.projectlombok</groupId>
                        <artifactId>lombok</artifactId>
                    </exclude>
                </excludes>
            </configuration>
        </plugin>
    </plugins>
</build>

Answer 1

发生这种情况是因为您具有Maven默认存储库配置，该配置每天更新一次来自存储库的工件。

要解决此问题，您有两种选择：

1. 使用maven build命令中的-U选项强制maven更新
2. 删除依赖项的目录，然后再次运行build命令

最后但并非最不重要的一点是，您可以更改存储库的updatePolicy 。 看看Maven仓库文档