spring boot-Spring boot的官方實例為何無法運行

Spring boot的官方實例為何無法運行

本人小白，學Java沒多久，剛剛開始接觸Spring boot，環境都配置好了，上手用官網上QuickStart試了一下，結果跑不起來。
代碼如下：

pom代碼：

 <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.sae.sg.lhf</groupId>
  <artifactId>hello</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <name>SampleController</name>
  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.3.0.RELEASE</version>
</parent>
<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
</dependencies>
</project>

Java代碼：

 package hello;

import org.springframework.boot.*;
import org.springframework.boot.autoconfigure.*;
import org.springframework.stereotype.*;
import org.springframework.web.bind.annotation.*;


@Controller
@EnableAutoConfiguration

public class SampleController {

    @RequestMapping("/")
    @ResponseBody
    String home() {
        return "Hello World!";
    }

    public static void main(String[] args) throws Exception {
        SpringApplication.run(SampleController.class, args);
    }
}

幾乎是完全按照官網上的實例照搬下來的，但是編譯之後報錯：

控制台最後輸出也有ERROR：
[ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:1.3.0.RELEASE:run (default-cli) on project hello: An exception occured while running. null: InvocationTargetException: Unable to start embedded Tomcat servlet container: Tomcat connector in failed state -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

求教是什麼原因，應該如何修改代碼？

最佳回答：

報錯的那個問題已經解決了，右鍵項目選maven--->Update Project..就可以了，但是編譯還是一直有錯，浏覽器訪問localhost:8080也沒有預期的效果