Spring Boot初步使用

About 15 minutesA favorite text editor or IDEJDK 1.8 or laterGradle 2.3+ or Maven 3.0+You can also import the code straight into your IDE:Spring Tool Suite (STS)IntelliJ IDEA

以上是官方文档，jdk1.8、maven 3.X、idea, 基础设施都有了，可以开工了。

新建maven工程，根据官方文档修改pom.xml

    <parent>        <groupId>org.springframework.boot</groupId>        <artifactId>spring-boot-starter-parent</artifactId>        <version>1.5.5.RELEASE</version>    </parent>    <dependencies>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-web</artifactId>        </dependency>    </dependencies>    <properties>        <java.version>1.8</java.version>    </properties>    <build>        <plugins>            <plugin>                <groupId>org.springframework.boot</groupId>                <artifactId>spring-boot-maven-plugin</artifactId>            </plugin>        </plugins>    </build>

在src/main/java下新建了Application类.
Application.java

@SpringBootApplicationpublic class Application {    public static void main(String[] args){        SpringApplication.run(Application.class, args);    }}

然后运行main函数，开始有如下警告，并且项目会报错。

** WARNING ** : Your ApplicationContext is unlikely to start due to a @ComponentScan of the default package.

新建一个package,然后把Application类移动到新建的package中，启动正常。