springboot 简单demo

1.Annotation
Spring MVC annotations (not specific to Spring Boot)

• @RestController

  handling incoming web requests

• @RequestMapping

  provides “routing” information

2. configure

• @EnableAutoConfiguration.

  want to configure Spring

3. The “main” Method run goal

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

4. Running the Example

• Creating an Executable Jar

mvn package

• To run that application, use the java -jar command, as follows:

$ java -jar target/myproject-0.0.1-SNAPSHOT.jar

• If you want to peek inside, you can use jar tvf, as follows:

$ jar tvf target/myproject-0.0.1-SNAPSHOT.jar

mvn

    4.0.0

    com.example
    SpringBootLearn
    1.0-SNAPSHOT

    
        org.springframework.boot
        spring-boot-starter-parent
        2.1.3.RELEASE
    

    

    
        
            org.springframework.boot
            spring-boot-starter-web
        
    

    
        
            
                org.springframework.boot
                spring-boot-maven-plugin
            
        
    

code

package com.example;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@EnableAutoConfiguration
public class Test {

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

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