Spring Boot QuickStart 5: Transaction Management

Transaction management:

Two new girls added:

First step: Create Girlrespository

 PackageCom.payease.service;ImportCom.payease.entity.Girl;Importorg.springframework.data.jpa.repository.JpaRepository;Importjava.util.List;/*** Created by liuxiaoming on 2017/11/6.*/ Public InterfaceGirlrespositoryextendsJparepository<girl,integer>{    //Conditional query: Search by age     PublicList<girl>findbyage (Integer age);}

Step Two: Create girlservice

 PackageCom.payease.service;ImportCom.payease.entity.Girl;Importorg.springframework.beans.factory.annotation.Autowired;ImportOrg.springframework.stereotype.Service;/*** Created by liuxiaoming on 2017/11/7.*/@Service Public classGirlservice {@AutowiredPrivategirlrespository girlrespository;  Public voidInserttwo () {Girl Girla=NewGirl (); Girla.setcupsize (A); Girla.setage (18);        Girlrespository.save (Girla); Girl girlb=NewGirl (); Girlb.setcupsize (B); Girlb.setage (20);    Girlrespository.save (GIRLB); }}

Step three: write in the controller

 Public class Girlcontroller {    @Autowired    private  girlservice girlservice;    @PostMapping ("Girls/two")    publicvoid  girltwo () {        Girlservice.inserttwo ();    }}

Fourth step: Start the project postman submit

Original database:

Postman after submitting the request:

Transaction management: Failed to insert data when data insertion is required

First step: Change the length of this field to 1

Step Two: Add annotations to the service

Spring Boot QuickStart 5: Transaction Management