SpringBoot入门之Idea工程快速搭建 02

悠悠 2021-11-09 14:31 364阅读 0赞

# 2. SpringBoot工程环境快速搭建 #

## 2.1 创建一个Maven项目 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjY0MTkwOQ_size_16_color_FFFFFF_t_70]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjY0MTkwOQ_size_16_color_FFFFFF_t_70 1]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjY0MTkwOQ_size_16_color_FFFFFF_t_70 2]  
**创建好的项目, 构造是下图这个样子的~**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjY0MTkwOQ_size_16_color_FFFFFF_t_70 3]

## 2.2 导入pom依赖 ##

<?xml version="1.0" encoding="UTF-8"?>
    <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>
    
        
        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.0.0.RELEASE</version>
        </parent>
    
        <groupId>com.acece</groupId>
        <artifactId>SpringBootStudy_01</artifactId>
        <version>1.0-SNAPSHOT</version>
    
        
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
        </dependencies>
    
    </project>

*  `spring-boot-starter-parent`: 在pom.xml中引入spring-boot-start-parent,spring官方的解释叫什么stater poms,它可以提供dependency management,也就是说依赖管理，引入以后在申明其它dependency的时候就不需要version了，后面可以看到。
 *  `spring-boot-starter-web`: springweb 核心组件, 因为springboot要集成springMVC进行Controller开发,所以要引入web依赖.

## 2.2 编写SpringBoot引导类 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjY0MTkwOQ_size_16_color_FFFFFF_t_70 4]

package com.acece;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    /** * 这是启动类 */
    @SpringBootApplication
    public class SpringBootApplicationRunner { 
        public static void main(String[] args) { 
            SpringApplication.run(SpringBootApplicationRunner.class,args);
        }
    }

## 2.3 启动引导类 ##

*  控制台启动信息如下,说明项目已经启动,而且还有一个默认的8080端口.  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjY0MTkwOQ_size_16_color_FFFFFF_t_70 5]
 *  我们访问8080端口,能够访问到,因为我们我们什么都没有返回给浏览器所以显示erro.  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjY0MTkwOQ_size_16_color_FFFFFF_t_70 6]

## 2.4 编写Controller类, 返回浏览器hello world ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjY0MTkwOQ_size_16_color_FFFFFF_t_70 7]

import org.springframework.web.bind.annotation.RestController;
    
    @RestController
    public class HelloWorld { 
        @RequestMapping("/index")
        public String index(){ 
            return "hello world";
        }
    }

**访问8080/index, 结果如下**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjY0MTkwOQ_size_16_color_FFFFFF_t_70 8]  
**至此, SpringBoot入门程序已完成,下篇详细介绍SpringBoot启动原理~, 喜欢本篇文章,请举起小手点个赞~~**

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