Idea项目--SpringBoot入门项目

我会带着你远行 2023-07-18 14:21 11阅读 0赞

原文网址：[Idea项目--SpringBoot入门项目\_IT利刃出鞘的博客-CSDN博客\_idea 项目][Idea_--SpringBoot_IT_-CSDN_idea]

# 其他网址 #

[使用idea快速创建springboot项目 - 前进的小学生的博客 - CSDN博客][idea_springboot_ - _ - CSDN]  
[使用idea创建第一个springboot项目 - FarStars的博客 - CSDN博客][idea_springboot_ - FarStars_ - CSDN]  
[使用IDEA创建一个springboot项目 - Spring Web Starter，Templa - 豌豆ip代理][IDEA_springboot_ - Spring Web Starter_Templa - _ip]

# 创建工程 #

File=> New=> Project=> Spring initializr=> 选择自己的JDK=> next

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3p6emZmaGg_size_16_color_FFFFFF_t_70][]

Group栏输入组织名，Artifact就是项目名。其它选择默认就好，直接Next

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZlaXlpbmcwY2FuZ2xhbmc_size_16_color_FFFFFF_t_70][]

我们要构建一个web项目通过访问Controller来验证项目是否成功搭建，所以这里添加web包

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZlaXlpbmcwY2FuZ2xhbmc_size_16_color_FFFFFF_t_70 1][]

输入工程名（默认会以工程名作为路径，当然可以修改）

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZlaXlpbmcwY2FuZ2xhbmc_size_16_color_FFFFFF_t_70 2][]

# 创建之后的结果 #

项目结构

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZlaXlpbmcwY2FuZ2xhbmc_size_16_color_FFFFFF_t_70 3][]

maven结构

可发现：SpringBoot自动带Tomcat，不需要外置的Tomcat。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZlaXlpbmcwY2FuZ2xhbmc_size_16_color_FFFFFF_t_70 4][]

pom.xml（自动生成的）

<?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 https://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>2.2.6.RELEASE</version>
            <relativePath/> 
        </parent>
        <groupId>com.example</groupId>
        <artifactId>demo</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <name>demo</name>
        <description>Demo project for Spring Boot</description>
    
        <properties>
            <java.version>1.8</java.version>
        </properties>
    
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
                <exclusions>
                    <exclusion>
                        <groupId>org.junit.vintage</groupId>
                        <artifactId>junit-vintage-engine</artifactId>
                    </exclusion>
                </exclusions>
            </dependency>
        </dependencies>
    
        <build>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                </plugin>
            </plugins>
        </build>
    
    </project>

# 直接运行 #

运行方法：Idea里找到DemoApplication.java并打开，点击左侧三角号即可。（或者用快捷键shift+f10）

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZlaXlpbmcwY2FuZ2xhbmc_size_16_color_FFFFFF_t_70 5][]

浏览器输入localhost:8080并打开。

可以看见一个错误页面，这是springboot为我们自动生成的错误页面/error，因为此时我们还没有创建一个Controller接口

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZlaXlpbmcwY2FuZ2xhbmc_size_16_color_FFFFFF_t_70 6][]

# 创建Controller #

在包上右键=> New=> Class

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZlaXlpbmcwY2FuZ2xhbmc_size_16_color_FFFFFF_t_70 7][]

输入Java文件名

> 下图这种方法，可以在包下边创建controller文件夹，再创建HelloContrller.java文件

![20200502200450128.png][]

创建之后的结果

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZlaXlpbmcwY2FuZ2xhbmc_size_16_color_FFFFFF_t_70 8][]

编辑HelloController.java

package com.example.demo.controller;
    
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    @RestController
    public class HelloController {
        @RequestMapping
        public String helloRoot(){
            return "This is root";
        }
    
        @RequestMapping("/hello")
        public String hello(){
            return "Hello World";
        }
    }

# 再次运行 #

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZlaXlpbmcwY2FuZ2xhbmc_size_16_color_FFFFFF_t_70 5][]

运行后，输入地址查看

![20200502201239354.png][]

![20200502201302364.png][]

[Idea_--SpringBoot_IT_-CSDN_idea]: https://knife.blog.csdn.net/article/details/105174868
[idea_springboot_ - _ - CSDN]: https://blog.csdn.net/zzzffhh/article/details/88732128
[idea_springboot_ - FarStars_ - CSDN]: https://blog.csdn.net/qq_34205356/article/details/81098354
[IDEA_springboot_ - Spring Web Starter_Templa - _ip]: https://www.wandouip.com/t5i377317/
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[20200502200450128.png]: /images/20230528/161cf1872d7a4e5a94dafa350132f3a6.png
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[20200502201239354.png]: /images/20230528/067e5e4c70cc43b7a06967142eadc71e.png
[20200502201302364.png]: /images/20230528/734cf2acba7742ec9f7c405237ce19a4.png