java - 无法解决maven依赖关系

Question

<?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.microservice.voucher</groupId>
    <artifactId>voucher</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>VoucherMicroService</name>
    <description>microservice project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-parent</artifactId>
        <version>Angel.SR3</version>
    </parent>

    <properties>
        <!-- Stand-alone RESTFul application for testing only -->
        <start-class>com.microservice.service.Main</start-class>
    </properties>

    <dependencies>
        <dependency>
            <!-- Setup Spring Boot -->
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <!-- Setup Spring MVC & REST, use Embedded Tomcat -->
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

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

        <dependency>
            <!-- Setup Spring Data common components -->
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-commons</artifactId>
        </dependency>

        <dependency>
            <!-- Testing starter -->
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
        </dependency>

        <dependency>
            <!-- Setup Spring Data JPA Repository support -->
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>

        <dependency>
            <!-- In-memory database for testing/demos -->
            <groupId>org.hsqldb</groupId>
            <artifactId>hsqldb</artifactId>
        </dependency>

        <dependency>
            <!-- Spring Cloud starter -->
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter</artifactId>
        </dependency>

        <dependency>
            <!-- Eureka service registration -->
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka-server</artifactId>
        </dependency>

        <dependency>
            <groupId>org.postgresql</groupId>
            <artifactId>postgresql</artifactId>
            <version>9.4-1201-jdbc41</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.scala-lang</groupId>
            <artifactId>scala-library</artifactId>
            <version>2.10.4</version>
        </dependency>
        <dependency>
            <groupId>org.neo4j</groupId>
            <artifactId>neo4j-cypher-compiler-2.1</artifactId>
            <version>2.1.5</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

这是我的 pom 文件

<小时/>

我正在将 Maven 项目导入到 sts，该项目来自 Windows，现在我正在尝试导入到 ubuntu。

这样的错误消息

Could not get the value for parameter encoding for plugin execution default-resources
Plugin org.apache.maven.plugins:maven-resources-plugin:2.6 or one of its dependencies could not be resolved: The following artifacts could not be resolved: org.apache.maven:maven-project:jar:2.0.6, org.apache.maven:maven-plugin-registry:jar:2.0.6, org.apache.maven:maven-artifact:jar:2.0.6: Failure to transfer org.apache.maven:maven-project:jar:2.0.6 from 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. Original error: Could not transfer artifact org.apache.maven:maven-project:jar:2.0.6 from/to central (https://repo.maven.apache.org/maven2): The operation was cancelled.

Answer 1

在两种情况下你会得到上面的错误

1. 如果maven中央存储库没有请求的jar
2. 如果无法访问maven中央存储库进行下载。

您的情况属于情况 2。我可以在 https://repo1.maven.org/maven2/org/apache/maven/maven-project/2.0.6/ 的中央存储库中看到 jar 文件之一。

检查 maven settings.xml 文件中的 intenet/proxy 设置。输入您的代理主机和端口值。

我粘贴下面的示例代理设置。

<proxies>
   <proxy>
      <id>example-proxy</id>
      <active>true</active>
      <protocol>http</protocol>
      <host>proxy.example.com</host>
      <port>8080</port>
      <username>proxyuser</username>
      <password>somepassword</password>
      <nonProxyHosts>www.google.com|*.example.com</nonProxyHosts>
    </proxy>
  </proxies>