Write your first Springboot application

1.1.1. Setting the parent of spring boot

<parent>      <groupId>org.springframework.boot</groupId>      <artifactId> spring-boot-starter-parent</artifactid>      <version>1.5.2.RELEASE</version>   </parent >

Description: The spring boot project must have the parent set to spring Boot's parent, which contains a large number of default configurations, which greatly simplifies our development.

1.1.2. Importing Spring Boot Web support

<dependency>        <groupId>org.springframework.boot</groupId>        <artifactId> Spring-boot-starter-web</artifactid>      </dependency>

　　

1.1.3. Adding a Spring Boot plugin

<plugin>           <groupId>org.springframework.boot</groupId>           <artifactId> Spring-boot-maven-plugin</artifactid>        </plugin>

1.1.4. Writing the first spring boot application

@Controller @springbootapplication@configurationpublic class Helloapplication {       @RequestMapping ("Hello")    @ Responsebody public    String Hello () {        return ' Hello world! ";    }       public static void Main (string[] args) {        springapplication.run (helloapplication.class, args);    

Code Description:

1, @SpringBootApplication: The core annotation of the Spring boot project, the main purpose is to turn on automatic configuration. ；

2. @Configuration: This is a configuration class that configures spring;

3, @Controller: Marked this is a SPRINGMVC controller controllers;

4, Main method: In the Main method to start an application, that is: the application of the portal;

1.1.5. Launching the app

In the spring boot project, there are two ways to start a direct run Java application and another is to run through the spring boot maven plugin.

The first type:

The second type:

Start effect:

See the following information to indicate that the boot was successful:

INFO 6188---[main] c.i.springboot.demo.helloapplication:started helloapplication in 3.281 seconds (JVM Running for 3.601)

1.1.6. Testing

Open the browser and enter the address:

Effect:

Isn't it easy?

Writing the first Springboot app