SpringBoot总结(四)--HelloWorld

灰太狼 2022-05-08 14:03 156阅读 0赞

本文内容来自尚硅谷

**目录**

1实现的功能

2创建一个maven项目

3导入spring boot相关的依赖

4编写一个主程序；启动Spring Boot应用

5、编写相关的Controller、Service

6运行main函数

7页面效果

8打包

8.1向pom.xml中引入插件

8.2idea打包

8.3执行该jar包

--------------------

# 1实现的功能 #

浏览器发送hello请求，服务器接受请求并处理，响应Hello World字符串；

# 2创建一个maven项目 #

![70][]

![70 1][]

![70 2][]

![70 3][]

创建了一个maven项目

![70 4][]

# 3导入spring boot相关的依赖 #

<parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>1.5.9.RELEASE</version>
        </parent>
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
        </dependencies>

![70 5][]

该依赖代码来自springboot官网的快速启动

![70 6][]

# 4编写一个主程序；启动Spring Boot应用 #

![70 7][]

package com.atguigu;
    
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    
    
    /**
     *  @SpringBootApplication 来标注一个主程序类，说明这是一个Spring Boot应用
     */
    @SpringBootApplication
    public class HelloWorldMainApplication {
    
        public static void main(String[] args) {
    
            // Spring应用启动起来
            SpringApplication.run(HelloWorldMainApplication.class,args);
        }
    }

# 5、编写相关的Controller、Service #

![70 8][]

package com.atguigu.controller;
    
    
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.ResponseBody;
    
    @Controller
    public class HelloController {
    
       @ResponseBody
       @RequestMapping("/hello")
        public String hello(){
            return "Hello World!";
        }
    }

# 6运行main函数 #

![70 9][]

# 7页面效果 #

![70 10][]

# 8打包 #

## 8.1向pom.xml中引入插件 ##

<build>
    		<plugins>
    			<plugin>
    				<groupId>org.springframework.boot</groupId>
    				<artifactId>spring-boot-maven-plugin</artifactId>
    			</plugin>
    		</plugins>
    	</build>

## 8.2idea打包  ##

# ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xzeDIwMTc_size_16_color_FFFFFF_t_70][] #

## 8.3执行该jar包 ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xzeDIwMTc_size_16_color_FFFFFF_t_70 1][]

[70]: /images/20220508/db7b68c281a247caa609ce8e7217c7ea.png
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xzeDIwMTc_size_16_color_FFFFFF_t_70]: /images/20220508/ca70b75dde6441de8684109c6d8915d1.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xzeDIwMTc_size_16_color_FFFFFF_t_70 1]: /images/20220508/b0976e4abf4f455fa865dba99034759c.png