初玩 spring boot，记录创建过程
1.File -- New -- Project
2. 选择 Spring Initializr，点击 Next
3.等待加载完成，图中圈的地方可以自定义修改，点Next
4. 选择Web -- Spring Web ，点击 Next
5.项目名和工程路径，点击 Finish
6.等待加载完，目录如下：
pom文件：
1 <?xml version="1.0" encoding="UTF-8"?>
2 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
3 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
4 <modelVersion>4.0.0</modelVersion>
5 <parent>
6 <groupId>org.springframework.boot</groupId>
7 <artifactId>spring-boot-starter-parent</artifactId>
8 <version>2.3.0.RELEASE</version>
9 <relativePath/> <!-- lookup parent from repository -->
10 </parent>
11 <groupId>com.example</groupId>
12 <artifactId>demo</artifactId>
13 <version>0.0.1-SNAPSHOT</version>
14 <name>demo</name>
15 <description>Demo project for Spring Boot</description>
16
17 <properties>
18 <java.version>1.8</java.version>
19 </properties>
20
21 <dependencies>
22 <dependency>
23 <groupId>org.springframework.boot</groupId>
24 <artifactId>spring-boot-starter-web</artifactId>
25 </dependency>
26
27 <dependency>
28 <groupId>org.springframework.boot</groupId>
29 <artifactId>spring-boot-starter-test</artifactId>
30 <scope>test</scope>
31 <exclusions>
32 <exclusion>
33 <groupId>org.junit.vintage</groupId>
34 <artifactId>junit-vintage-engine</artifactId>
35 </exclusion>
36 </exclusions>
37 </dependency>
38 </dependencies>
39
40 <build>
41 <plugins>
42 <plugin>
43 <groupId>org.springframework.boot</groupId>
44 <artifactId>spring-boot-maven-plugin</artifactId>
45 </plugin>
46 </plugins>
47 </build>
48
49 </project>
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7.新建 controller 目录，在此目录下新建 HelloController 文件，内容如下：
1 package com.example.demo.controller;
2
3
4 import org.springframework.web.bind.annotation.*;
5
6
7 /**
8 * created by why
9 * @date 20200531
10 *
11 */
12
13
14 @RestController
15 public class HelloController {
16
17 @GetMapping("/hello")
18 public String say(){
19 return "Hello Spring boot";
20 }
21
22 @GetMapping("add1")
23 public String h1(){
24 return "这add1";
25 }
26
8.运行 DemoApplication，如图，打开链接 http://127.0.0.1:8080/hello
9.启动后的端口 是 8080，可以在 application.properties 文件中 添加如图，修改启动端口
1 #端口号
2
