安装Spring-启动Maven项目

Question

我正在尝试从配置Spring项目。

依赖关系-> kafka，web

当我导入这个项目时，我在pom.xml中出现了错误

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.6.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>

作为

Project build error: Non-resolvable parent POM for com.mobicule.kafkaexample:Spring-Producer:0.0.1-SNAPSHOT: Cannot 
 access central (https://repo.maven.apache.org/maven2) in offline mode and the artifact org.springframework.boot:spring-boot-
 starter-parent:pom:2.0.6.RELEASE has not been downloaded from it before. and 'parent.relativePath' points at no local POM

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.mobicule.kafkaexample</groupId>
    <artifactId>Spring-Producer</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>Spring-Producer</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.6.RELEASE</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-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.kafka</groupId>
            <artifactId>spring-kafka</artifactId>
        </dependency>

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

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


</project>

在“首选项”下，我已将安装作为嵌入式检查。这会造成什么问题吗？

另外，我是否需要在eclipse中单独安装maven才能运行这个项目？

请指导我，因为我无法理解任何maven错误。

Answer 1

您正处于脱机模式。见例外

脱机模式下的访问中心( access，https://repo.maven.apache.org/maven2)和工件org.SpringFrawork.boot:spring starter:pom:2.0.6以前没有从它下载过artifact。

你使用什么IDE？

编辑:在Eclipse中，转到: Window/Preferences/Maven -> First复选框，将Maven设置为脱机模式。检查是否选中了此选项。如果选择了->，取消选择并尝试重新构建(干净安装)