POM 错误：未能找到 org.springframework.boot

Question

新手上路，请多包涵

我一直在尝试设置一个 Spring Boot 项目，但出现错误。我研究并尝试了各种选择，但到目前为止没有运气。任何帮助，将不胜感激。

项目构建错误：Non-resolvable parent POM: Failure to find org.springframework.boot:spring-boot-starter-parent:pom:1.1.3.RELEASE in http://repo.maven.apache.org/ maven2 被缓存在本地存储库中，直到经过中央的更新间隔或强制更新并且’parent.relativePath’指向没有本地POM，才会重新尝试解析

POM.XML（父标签错误）

 <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.programmingfree</groupId>
  <artifactId>spring-data-rest-angular</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <name>Spring Data Rest + AngularJS</name>
  <description>This project uses Spring Data Rest and AngularJS to perform CRUD operations against MySql Database.</description>
  <parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.1.3.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
  <dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-thymeleaf</artifactId>
		</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-rest</artifactId>
		</dependency>
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
		</dependency>
	</dependencies>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<start-class>com.programmingfree.springservice.Application</start-class>
		<java.version>1.7</java.version>
	</properties>

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