spring boot demo

╰+哭是因爲堅強的太久メ 2022-02-23 00:58 140阅读 0赞

### 说明 ###

*  项目基于idea+maven
 *  代码github位置：https://github.com/ydfind/java-blog/tree/master/firstboot
 *  最终项目目录：  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NuZGF5WVU_size_16_color_FFFFFF_t_70]

### 程序 ###

##### 1 idea新建maven项目，项目名称“first-boot” #####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NuZGF5WVU_size_16_color_FFFFFF_t_70 1]  
![!\[在这里插入图片描述\](https://img-blog.csdnimg.cn/20190405145523655.png?x-oss-process=image/watermark,type\_ZmFuZ3poZW5naGVpdGk,shadow\_10,text\_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NuZGF5WVU=,size\_16,color\_FFFF][https_img-blog.csdnimg.cn_20190405145523655.png_x-oss-process_image_watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NuZGF5WVU_size_16_color_FFFF]  
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##### 2 添加依赖，pom添加下面 #####

<properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>
      
      <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.5.RELEASE</version>
      </parent>
      <dependencies>
        
        <dependency>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
      </dependencies>

##### 3 编写控制器 #####

package com.ydfind.blog.demo;
    
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.ResponseBody;
    
    /**
     * @author ydfind
     * @create 2019-04-05 15:10
     */
    @Controller
    public class FirstBootController {
        @GetMapping("/hello")
        @ResponseBody
        public String hello(){
            return "Hello World";
        }
    }

##### 4 编写启动类 #####

package com.ydfind.blog.demo;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    
    /**
     * @author ydfind
     * @create 2019-04-05 15:07
     */
    @SpringBootApplication
    public class FirstBootMainApp {
    
        public static void main(String[] args){
            SpringApplication.run(FirstBootMainApp.class, args);
        }
    }

##### 5 运行 #####

启动FirstBootMainApp类的main函数:  
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### 服务器运行jar ###

若需要idea编译成jar，在centos运营，则pom.xml还需要

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

### 流程总结 ###

*  建立maven项目
 *  pom添加parent的spring-boot-starter-parent（版本2.1.5.RELEASE）,和spring-boot-starter-web；
 *  写启动类。@SpringBootApplication、SpringApplication.run(main.class, args);
 *  写controller类。@RestController，@GetMapping的hello函数
 *  启动程序，访问hello接口验证

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