使用STS的项目构建错误

Question

在spring中创建一个新的Spring项目时，我收到以下错误消息

项目构建错误:com.test:security的不可解决的父POM :1.3.8-快照:未能将org.springframework.boot:spring-boot-starter-parent:pom:1.3.8.RELEASE从https://repo.maven.apache.org/maven2中缓存在本地存储库中，在中央更新间隔过去或更新被强制执行之前，不会重新尝试解析。原始错误:无法将工件org.springframework.boot:spring-boot-starter-parent:pom:1.3.8.RELEASE从/转到中心(https://repo.maven.apache.org/maven2)：在没有本地POM的情况下连接超时和“parent.relativePath”点

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.test</groupId>
   <artifactId>security</artifactId>
   <version>1.3.8-SNAPSHOT</version>
   <packaging>jar</packaging>
   <name>security</name>
   <description>Demo project for Spring Boot</description>

   <parent>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-parent</artifactId>
      <version>1.3.8.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-security</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>

对于每个spring项目，我都会收到上面的错误消息。

Answer 1

您应该将Spring引导父级依赖项更新为最新的realease1.5.3：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.3.RELEASE</version>
</dependency>

Answer 2

你用的是Maven 2还是Maven 3.x

根据文档，Spring Boot与Apache Maven 3.2或更高版本(https://docs.spring.io/spring-boot/docs/current-SNAPSHOT/reference/htmlsingle/#getting-started-maven-installation)兼容。