Spring Boot 主类及目录结构介绍说明

 
在介绍Spring Boot目录结构前，笔者先简述Spring Boot项目和传统项目的区别
   1.Spring Boot通常情况下，打成一个jar包
     传统项目通常会打成一个war包
   2.Spring Boot直接打成jar包，里面内置了Servlet容器 
     可直接使用 java -jar ****.jar 无需web容器的Servlet容器

META-INF/MANIFEST.MF

Manifest-Version: 1.0
Archiver-Version: Plexus Archiver
Built-By: admin
Start-Class: cn.javastack.MyApplication
Spring-Boot-Classes: BOOT-INF/classes/
Spring-Boot-Lib: BOOT-INF/lib/
Spring-Boot-Version: 2.0.4.RELEASE
Created-By: Apache Maven 3.5.0
Build-Jdk: 1.8.0_151
Main-Class: org.springframework.boot.loader.JarLauncher

jar包内容

 +- java265
     +- TestMain.java
     |
     +- user
     |   +- User.java
     |   +- UserController.java
     |   +- UserService.java
     |   +- UserRepository.java
     |
     +- order
         +- Order.java
         +- OrderController.java
         +- OrderService.java
         +- OrderRepository.java

主启动类

package cn.java265.TestMain;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;


/*
* java265.com 示例代码
*/

@SpringBootApplication
public class TestMain {

    public static void main(String[] args) {
        SpringApplication.run(MyApplication.class, args);
    }

}