SpringBoot-- classic Hello World [two]

Foreword

To create a hello world chant

step

Of course, it is to open our IDEA to create a Maven project Kazakhstan

Create a project

1. File->New->Project

2.Maven-> JDK version choose -> Next

3. Groupld->Artifactld->Next

4. location->Finsh

5. Open Auto Import

Import dependence

Import-related dependence of SpringBoot into SpringBoot official website clicks Quick startin the Spring Lnitializr
after fill in specific information, we can click on Explore- Ctrl + Spaceto generate a pom.xmlfile, simply copy the configuration to cover the project.

Main program

Write a main program used to start SpringBoot applications, please pay attention to self-created position.
1. Create a class file

2. mark the main program

3. The main program code as follows

package com.wangyang;


import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;

/**
 * @SpringBootApplication 标注一个主程序类,说明这是一个Spring Boot应用
 */
//DataSourceAutoConfiguration禁止自动加载,不然会产生报错
@SpringBootApplication(exclude= {DataSourceAutoConfiguration.class})
public class HelloWorldMainApplication {

    public static void main(String[] args) {
        //启动Spring应用
        SpringApplication.run(HelloWorldMainApplication.class,args);
    }
}

Write business code

1. Create a controller controller

2. Business Code

package com.wangyang.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
public class HelloWorldController {

    @ResponseBody
    @RequestMapping("/")
    public String hello(){
        return "hello world";
    }
}

Run the main method

Returns to the main program, the main method can be run directly

address

Project Package

Run jar package

access