spring boot项目新建

1、右建

2、maven,下一步取名新建

3、pom.xml文件

插入依赖

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.4.RELEASE</version>
    </parent>

    <dependencies>
        <!--web起步依赖-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- redis 使用-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.51</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>

        <!--通用mapper起步依赖-->
        <dependency>
            <groupId>tk.mybatis</groupId>
            <artifactId>mapper-spring-boot-starter</artifactId>
            <version>2.0.4</version>
        </dependency>
        <!--MySQL数据库驱动-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <!--mybatis分页插件-->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper-spring-boot-starter</artifactId>
            <version>1.2.3</version>
        </dependency>
    </dependencies>

4、创建文件

内容
application.yml

server:
  port: 9001
spring:
  application:
    name: dade01
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://192.168.200.128:3306/changgou_goods?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC
    username: root
    password: root

DadeApplication

package com;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
//@MapperScan(basePackages = {"dao"})
public class DadeApplication {
    public static void main(String[] args) {
        SpringApplication.run( DadeApplication.class);
    }
}

AdminController

package com.controller;

import org.springframework.web.bind.annotation.*;

@RestController
@CrossOrigin
@RequestMapping("/admin")
public class AdminController {
    @GetMapping("/{id}")
    public long findById(@PathVariable Long id){

        return 123;
    }
}

右建导入maven，DadeApplication运行