【Java实战】创建第一个Springboot项目Hello world

- 日理万妓 2024-02-21 04:21 70阅读 0赞

没有旗舰版的Idea授权，所以安装了社区版的idea。不知道从何时开始，社区版IDEA的插件不好用了，所以就换了个方法生成Springboot项目。

#### 一 在线生成 ####

选择好对应的选项后，点击生成就可以下载到一个完整的springboot项目了。

![ff4ca6aef4a346a89b0bc09c3a59be86.png][]

#### 二 使用IDEA maven生成 ####

1、点击新建项目

2、选中左侧maven，然后点击Next按钮。

![a62df15519bc4053ae2690a1cfd84fac.png][]

3、填写项目的名称，点击Finish

![149df445feee44338a7e18fa0e5b6bfe.png][]

4、生成的项目大概是这个样子的

![f082b10ded7b463f81f16ae216b13cbd.png][]

5、修改pom.xml、增加application、增加controller

**pom.xml**

<?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>org.example</groupId>
        <artifactId>learningExample2</artifactId>
        <version>1.0-SNAPSHOT</version>
        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.7.16</version>
            <relativePath/> 
        </parent>
        <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.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <optional>true</optional>
            </dependency>
        </dependencies>
        <build>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                    <configuration>
                        <excludes>
                            <exclude>
                                <groupId>org.projectlombok</groupId>
                                <artifactId>lombok</artifactId>
                            </exclude>
                        </excludes>
                    </configuration>
                </plugin>
            </plugins>
        </build>
        <repositories>
            <repository>
                <id>spring-milestones</id>
                <name>Spring Milestones</name>
                <url>https://repo.spring.io/milestone</url>
                <snapshots>
                    <enabled>false</enabled>
                </snapshots>
            </repository>
            <repository>
                <id>spring-snapshots</id>
                <name>Spring Snapshots</name>
                <url>https://repo.spring.io/snapshot</url>
                <releases>
                    <enabled>false</enabled>
                </releases>
            </repository>
        </repositories>
        <pluginRepositories>
            <pluginRepository>
                <id>spring-milestones</id>
                <name>Spring Milestones</name>
                <url>https://repo.spring.io/milestone</url>
                <snapshots>
                    <enabled>false</enabled>
                </snapshots>
            </pluginRepository>
            <pluginRepository>
                <id>spring-snapshots</id>
                <name>Spring Snapshots</name>
                <url>https://repo.spring.io/snapshot</url>
                <releases>
                    <enabled>false</enabled>
                </releases>
            </pluginRepository>
        </pluginRepositories>
    
    </project>

LearningExample2Application.java

package org.example.learningExample2;
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    
    @SpringBootApplication
    public class LearningExample2Application {
    
        public static void main(String[] args) {
            SpringApplication.run(LearningExample2Application.class, args);
        }
    }

TestController.java

package org.example.learningExample2.controller;
    
    
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    @RestController
    @RequestMapping("/")
    public class TestController {
        @GetMapping("/test")
        public String testHello(){
            return "hello world";
        }
    }

**启动程序就可以访问了，默认是8080端口。**

![f3af972eca5a4ac3ad367dc77ce3c13b.png][]

6、如果想要更改访问的端口和访问路径，则可以在yml中修改。

![926ef9b9557f4b0594415a181db910bf.png][]

重新启动程序，就可以用新的链接访问程序了。

![9ae21f7713e440bd99c79cd6811083c2.png][]

[ff4ca6aef4a346a89b0bc09c3a59be86.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/21/19ac19259c144f03acd9d9adcc8493f6.png
[a62df15519bc4053ae2690a1cfd84fac.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/21/17b1fedebc6241298596fbecb948d8ee.png
[149df445feee44338a7e18fa0e5b6bfe.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/21/71bc7aedac62422f92a2b50d1866a4d0.png
[f082b10ded7b463f81f16ae216b13cbd.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/21/f2354fd57a654f0f89e602649ddb2522.png
[f3af972eca5a4ac3ad367dc77ce3c13b.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/21/03eea3543fe141b984358c40fd710605.png
[926ef9b9557f4b0594415a181db910bf.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/21/b9455fc409cf411886fb09120d95828e.png
[9ae21f7713e440bd99c79cd6811083c2.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/21/5ddaaa9e517849108cd5a90cfb4708d1.png