1. New project springboot.world
2.pom.xml to add parent dependencies
<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.2.RELEASE</version> </parent>
Add the parent dependency of spring boot, so that the current project is the spring boot project, spring-boot-starter-parent is a special starter, which is used to provide related Maven default dependencies
3.pom.xml add web dependencies
<dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> </dependencies>
After adding this, the following annotations can be used. As for why, it should be clear when you think about it with your butt. I will not describe it in detail here.
@RestController
@RequestMapping("/simple")
............etc
4. Write a simple controller experience
package com.basic.demo;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
/**
* desc: simple controller
* @date 2017-03-28 11:28:56
* @author hone the dragon
*
*/
@RestController
@RequestMapping("/simple")
public class SimpleController {
@RequestMapping("/hello/{id}")
public String hello(@PathVariable("id") Long id){
return "Hello: "+id;
}
}
Project startup entry
package com.basic.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
/**
* desc: project startup entry
* @date 2017-03-28 11:29:39
* @author hone the dragon
*
*/
@SpringBootApplication
public class App {
public static void main(String[] args) {
SpringApplication.run(App.class, args);
}
}
Run the main method, so we start the project, what are you waiting for, test it out
Enter the address: http://localhost:8080/simple/hello/666666
The effect is as follows:
success! ! ! Not much nonsense. crap now
@SpringBootApplication is the core annotation of the spring boot project, the main purpose is to enable automatic configuration.
The @SpringBootApplication annotation mainly combines @Configuration, @EnableAutoConfiguration, @ComponentScan
Spring Boot will automatically scan the sibling package of the class where @SpringBootApplication is located, as well as the beans in the subordinate package