接上一博客：spring boot mvc入门与配置（一），本文内容实现基本的mvc功能
导入后的结构如下图所示
DemoApplication类是启动类，里面有main函数，并且运行的时候要按照java application来运行
编写配置文件
#Common Application properties #https://docs.spring.io/spring-boot/docs/current/reference/html/appendix-application-properties.html#data-properties spring. thymeleaf: prefix: "classpath:/templates/" suffix: ".html" #数据源基本配置 spring.datasource.url=jdbc:mysql://localhost:3306/mybatis?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8&useSSL=true spring.datasource.username=root spring.datasource.password=root spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver # 下面是数据库连接池配置 # Hikari will use the above plus the following to setup connection pooling spring.datasource.type=com.zaxxer.hikari.HikariDataSource spring.datasource.hikari.minimum-idle=10 spring.datasource.hikari.maximum-pool-size=25 spring.datasource.hikari.auto-commit=true spring.datasource.hikari.idle-timeout=30000 spring.datasource.hikari.pool-name=DatebookHikariCP spring.datasource.hikari.max-lifetime=1800000 spring.datasource.hikari.connection-timeout=30000 spring.datasource.hikari.connection-test-query=SELECT 1：键值对和=键值对可以混合使用
package com.example.demo; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.EnableAutoConfiguration; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.context.annotation.ComponentScan; //@SpringBootApplication相当于下面三个配置: //@EnableAutoConfiguration //@ComponentScan({"com.xx","com.xx2"}) //@Configuration: //@ComponentScan默认扫描启动类的所在的包和子包下面所有的注解。 //https://docs.spring.io/spring-boot/docs/current/reference/html/using-spring-boot.html#using-boot-using-springbootapplication-annotation //一篇比较好的关于@configuration博客文章： //https://www.cnblogs.com/duanxz/p/7493276.html @SpringBootApplication public class DemoApplication { public static void main(String[] args) { SpringApplication.run(DemoApplication.class, args); } }所有的包和类需要在com.example.demo 下面创建
直接在应用程序包下面创建一个controller类：
package com.example.demo; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PostMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; @RestController public class MyController { @GetMapping("/hello") public String hello() { return "hello world"; } }上述代码@RestController表示返回的是一个json字符串类型的controller
右击DemoApplication类运行项目，如下入所示
输入结果如下图所示 ：
稍微深入一点的spring boot mvc开发：thymeleaf和mybatis实现网站的入门案例，请参考我的博文sping boot2整合Mybatis以及常犯错误。
