构建第一个SpringBoot项目

我不是女神ヾ 2022-05-23 06:09 347阅读 0赞

1.配置POM.xml文件

<?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>
    
        <groupId>com.didispace</groupId>
        <artifactId>Chapter1</artifactId>
        <version>1.0.0</version>
        <packaging>jar</packaging>
    
        <name>Chapter1</name>
        <description>The first Spring Boot project</description>
    
        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.0.2.RELEASE</version>
            <relativePath/> 
        </parent>
    
        <properties>
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
            <java.version>1.8</java.version>
        </properties>
    
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency> 
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
    
        </dependencies>
    
        <build>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
        ````
        < plugin>
            </plugins>
        </build>
    
    </project>

2.文件结构  
![这里写图片描述][70]

3.spring boot应用程序入口

package com.didispace;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    
    @SpringBootApplication
    public class Chapter1Application { 
    
        public static void main(String[] args) {
            SpringApplication.run(Chapter1Application.class, args);
        }
    
    }

4.配置controller

package com.didispace.web;
    
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    //作用相当于spring中的@Controller
    @RestController
    public class HelloController { 
    
        @RequestMapping("/hello")
        public String index() {
            return "Hello World";
        }
    
    }

5.配置web程序启动的端口号  
在spring boot的通用配置文件application.properties中配置server.port属性值

# 服务端口
    server.port=8080

\`6.启动程序  
运行Chapter1Application 中的main方法，当启动成功后，在浏览器中访问8080端口会出现如下所示的界面：  
![这里写图片描述][70 1]

[70]: /images/20220523/640004a6d19e4da3acca249e474b87ed.png
[70 1]: /images/20220523/7323262dc0464d7aa38462a920290db3.png