我前面的帖子有介绍spring boot的简单搭建，现在我再讲讲spring boot的简单配置

首先，项目结构

启动类

@RestController    注解相当于@ResponseBody ＋ @Controller合在一起的作用。
@SpringBootApplication     项目创建默认的注解，解释的话有点多直接贴网址大家自己进去了解   https://blog.csdn.net/dyangel2013/article/details/79775122    
@EnableAutoConfiguration     详细的自己去了解一下   https://blog.csdn.net/zxc123e/article/details/80222967

package com.example;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;@RestController
@SpringBootApplication
@EnableAutoConfiguration
public class BaiduditudemoApplication {public static void main(String[] args) {SpringApplication.run(BaiduditudemoApplication.class, args);}
}

pojo包下不需要什么注解

我倒是了解到现在可以加入

@Getter
@Setter
@ToString

可以让你省略掉冗余的get  set 方法和toString方法

mapper包下是接口和mapper文件

接口依然不需要什么注解，mapper文件中需要注意的有一点

1中是对应的接口位置

2中对应pojo实体类

service包下的结构

接口依然没有什么注解，service的实现类需要加入@service注解

也可以加上@Transactional事务处理的注解，事务处理在启动类也可以用另一个注解加入

这是application.properties里的配置

spring.datasource.url=jdbc:mysql://localhost:3306/mpms
spring.datasource.username=root
spring.datasource.password=123
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.jpa.database=mysql

最后就是pom文件了，当然pom文件肯定不是最后才配置的，我只是放在最后说

<?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><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.1.3.RELEASE</version><relativePath /> <!-- lookup parent from repository --></parent><groupId>com.example</groupId><artifactId>baiduditudemo</artifactId><version>0.0.1-SNAPSHOT</version><name>baiduditudemo</name><description>Demo project for Spring Boot</description><properties><java.version>1.8</java.version></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-aop</artifactId></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-jdbc</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><scope>runtime</scope></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><dependency><groupId>org.mybatis.spring.boot</groupId><artifactId>mybatis-spring-boot-starter</artifactId><version>1.1.1</version></dependency><!-- http --><!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpcore --><dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpcore</artifactId><version>4.4.10</version></dependency><!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpclient --><dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpclient</artifactId><version>4.5.6</version></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project>

很多注解我也不是很深入的理解，目前只能说是能够运用，大家多多谅解不能详细给大家解释