使用SpringToolSuite打开新的Spring Boot项目时出错

Question

我刚接触SpringBootApplication，我下载了Spring3.7.2，我正在尝试创建一个简单的Spring.I。我转到File->New Spring Starter Project，选择Type作为Maven project，在dependencies下面选择Web并单击Finish。我在pom.xml中的父标记上得到一个错误，并且也看不到maven依赖库。我尝试右键单击项目->选择Maven->更新项目->选中所有框和更新，但不起作用。我也尝试过清理C：{User}下的存储库，清理并重新构建项目，但对我不起作用。Screenshot of the STS

项目生成错误:无法解析的POM父POM。示例:演示:0.0.1-快照:无法将项目org.springframework.boot:spring-boot-starter-parent:pom:1.4.3.RELEASE从中心(https://repo.maven.apache.org/maven2)传输到中心( repo.maven.apache.org )：没有本地POM处的repo.maven.apache.org和'parent.relativePath‘点

请告诉我我漏掉了什么。下面是我的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.example</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>SpringApplication1</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.4.3.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.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>