Spring boot扫描包@ComponentScan 、@EnableJpaRepositories、@EntityScan

package com.reptile.springboot.start; /**

• Alipay.com Inc. Copyright © 2004-2019 All Rights Reserved.
  */

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.domain.EntityScan;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
*

• @author Administrator

• @version $Id: TestApplication.java, v 0.1 2019年07月01日 20:14 Administrator Exp $
  /
  @SpringBootApplication
  @RestController
  @ComponentScan(basePackages = "com.reptile.springboot.")
  @EnableJpaRepositories(basePackages = “com.reptile.springboot.dao”)
  @EntityScan(basePackages = “com.reptile.springboot.entity”)
  public class Application {

  //@RequestMapping("/")
  //public String helloSpring(){
  // return “hello spring boot”;
  //}

  public static void main(String [] agrs){

   SpringApplication.run(Application.class,agrs);
  

  }
  }
  @ComponentScan(basePackages = “com.reptile.springboot.*”)
  是扫描@Controller @Service 等注解的
  @EnableJpaRepositories(basePackages = “com.reptile.springboot.dao”)
  是扫描@Repository注解的 就是Dao 接口继承 JpaRepository
  @EntityScan(basePackages = “com.reptile.springboot.entity”)
  是扫描@Entity 的注解， 扫描实体类

如果不配置这个三个注解 会报找不到相应的bean