springboot入门程序详解

亦凉 2022-04-06 06:57 156阅读 0赞

springboot程序

工具

maven

sts

java8(微服务)

1.首先springboot它是一个快速搭建spring的框架(使用java8的微服务技术),相比较springmvc而言少了更多的配置,因为它已经封装了springmvc.因此使用maven开发我们只需要引入的依赖即可

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
      <modelVersion>4.0.0</modelVersion>
    
      <groupId>com.bldz.springboot</groupId>
      <artifactId>springboot-helloworld</artifactId>
      <version>0.0.1-SNAPSHOT</version>
      <packaging>jar</packaging>
    
      <name>springboot-helloworld</name>
      <url>http://maven.apache.org</url>
    
    
      
      <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <java.version>1.8</java.version>
      </properties>
    
      <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>1.5.1.RELEASE</version>
        </parent>
    
        <dependencies>
            
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
    		<dependency>
            	<groupId>junit</groupId>
            	<artifactId>junit</artifactId>
            </dependency>
        </dependencies>
    </project>

2.由于springboot底层使用的是springmvc,因此我们在写controller层的时候,需要引入注解@RestController,这里的@RestController 相当于 springmvc的 @controller和@RequestBody,代码如下

package org.spring.springboot;
    
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    /**
     * 
     * @RestController 相当于 springmvc的 @controller和@RequestBody
     * @author qinxw
     *
     */
    @RestController
    public class HelloWorldController {
    	@RequestMapping("/")
    	public String hello() {
    		return "hello";
    	}
    }

3.就是写一个springboot的启动类,并使用springboot框架的@SpringBootApplication注解标记为这是springboot的启动类,详细代码如下

package org.spring.springboot;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    
    /**
     * springboot 启动类
     * @author qinxianwei
     *
     */
    @SpringBootApplication
    public class App{
        public static void main(String[] args ){
            SpringApplication.run(App.class, args);
        }
    }

4.运行main方法,测试结果如下

![8f0e532b-762b-3993-b908-38099ada37c4.png][]  
   
![256b2fda-bf39-33b7-b318-ef004ce21a12.png][]

码云代码下载链接

https://git.oschina.net/ymdrqq/springboot-helloworld.git

[8f0e532b-762b-3993-b908-38099ada37c4.png]: /images/20220406/2ba277f72e0540e3aa3e3a6c9adf37ba.png
[256b2fda-bf39-33b7-b318-ef004ce21a12.png]: /images/20220406/1d2d655b197c47b0ab3654e5b8170a9b.png